7th Class Science Acids, Bases and Salts / अम्ल, क्षार एवं लवण Question Bank

done Acids, Bases and Salts Total Questions - 130

• question_answer1)
  Acid present in soured curd is
  A)
  Lactic acid       done clear
  B)
  Acetic acid done clear
  C)
  Tartaric acid                done clear
  D)
  Oxalic add done clear
  View Solution play_arrow

• question_answer2)
  Which of the following acid is used by gold smith for dissolving gold?
  A)
  Nitric acid                    done clear
  B)
  Sulphuric acid done clear
  C)
  Aqua regia                   done clear
  D)
  Hydrochloric acid done clear
  View Solution play_arrow

• question_answer3)
  Which of the following substance present in turmeric changes its colour on reaction with base?
  A)
  Lichen                         done clear
  B)
  Magnesia done clear
  C)
  Curcumin        done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer4)
  Which of the following is not an indicator?
  A)
  China rose      done clear
  B)
  Onion done clear
  C)
  Clove                           done clear
  D)
  Lemon done clear
  View Solution play_arrow

• question_answer5)
  Sodium bicarbonate is commonly called
  A)
  Lime water                  done clear
  B)
  Slaked lime done clear
  C)
  Washing soda              done clear
  D)
  Baking soda done clear
  View Solution play_arrow

• question_answer6)
  Complete the following analogy: Turmeric: Indicator:: Milk of magnesia:
  A)
  Strong acid                  done clear
  B)
  Antacid done clear
  C)
  Antidote for sting         done clear
  D)
  Hydrated salt done clear
  View Solution play_arrow

• question_answer7)
  Complete the following analogy: Sea water : Salty:: ______: Soap
  A)
  Bitter                            done clear
  B)
  Slippery done clear
  C)
  Sour                             done clear
  D)
  Both (a) and (b) done clear
  View Solution play_arrow

• question_answer8)
  Which one of the following salts is used for making detergent powder?
  A)
  Washing soda  done clear
  B)
  Potassium nitrate done clear
  C)
  Sodium bicarbonate    done clear
  D)
  Common salt done clear
  View Solution play_arrow

• question_answer9)
  Which of the following is not a base?
  A)
  Magnesium hydroxide done clear
  B)
  Calcium hydroxide done clear
  C)
  Calcium carbonate done clear
  D)
  Sodium hydroxide done clear
  View Solution play_arrow

• question_answer10)
  Antacids contain -
  A)
  Strong acid                  done clear
  B)
  Weak base done clear
  C)
  Strong base                  done clear
  D)
  Weak acid done clear
  View Solution play_arrow

• question_answer11)
  Usefulness of an indicator depends upon change in:
  A)
  its colour         done clear
  B)
  its physical state done clear
  C)
  its temperature             done clear
  D)
  its pressure done clear
  View Solution play_arrow

• question_answer12)
  Acid present in vinegar is:
  A)
  formic acid                  done clear
  B)
  acetic acid done clear
  C)
  sulphuric acid              done clear
  D)
  nitric acid done clear
  View Solution play_arrow

• question_answer13)
  Reaction of an acid with a base is:
  A)
  decomposition             done clear
  B)
  combination done clear
  C)
  redox                           done clear
  D)
  neutralization done clear
  View Solution play_arrow

• question_answer14)
  Antacids contain:
  A)
  weak base        done clear
  B)
  weak acid done clear
  C)
  strong base      done clear
  D)
  strong acid done clear
  View Solution play_arrow

• question_answer15)
  Which medicines are used for treating indigestion?
  A)
  Antibiotic        done clear
  B)
  Analgesic done clear
  C)
  Antacids         done clear
  D)
  Antiseptic done clear
  View Solution play_arrow

• question_answer16)
  Which of the following is acidic in nature?
  A)
  Apple juice      done clear
  B)
  Soap solution done clear
  C)
  Slaked lime                  done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer17)
   .................. is present in sour milk-
  A)
  Glycolic add                done clear
  B)
  Lactic acid done clear
  C)
  Citrus add       done clear
  D)
  Tartaric acid done clear
  View Solution play_arrow

• question_answer18)
   .................. is the strongest add:
  A)
  Nitric add       done clear
  B)
  Malic add done clear
  C)
  Formic add                  done clear
  D)
  Lactic add done clear
  View Solution play_arrow

• question_answer19)
  Sharp pain caused by an ant bite is due to:
  A)
  malic acid                    done clear
  B)
  nitric acid done clear
  C)
  formic add       done clear
  D)
  lactic add done clear
  View Solution play_arrow

• question_answer20)
  Acid turns:
  A)
  blue litmus red    done clear
  B)
  red litmus blue done clear
  C)
  blue litmus green          done clear
  D)
  red litmus yellow done clear
  View Solution play_arrow

• question_answer21)
  Which is not a property of an acid?
  A)
  All acids have sour taste. done clear
  B)
  All acids turn blue litmus red. done clear
  C)
  All acids turn red litmus blue. done clear
  D)
  All the acids give neutralisation reaction. done clear
  View Solution play_arrow

• question_answer22)
  Bases:
  A)
  have slippery feel         done clear
  B)
  tastes sour done clear
  C)
  turn blue litmus red      done clear
  D)
  All these are correct done clear
  View Solution play_arrow

• question_answer23)
  Acids are stored in glass container and not in metallic containers. Why?
  A)
  Glass containers are transparent done clear
  B)
  Glass containers are cheaper done clear
  C)
  Metal containers are not easily available. done clear
  D)
  Metals react with acids if acids are stored in metallic containers. done clear
  View Solution play_arrow

• question_answer24)
  Which of the following is a neutralization reaction?
  A)
  Sodium chloride + Water\[\to \] Sodium hydroxide + Hydrochloric acid done clear
  B)
  Calcium carbonate + Water\[\to \] Calcium hydroxide + Carbon dioxide done clear
  C)
  Sodium hydroxide + Hydrochloric add \[\to \]Sodium chloride + Water done clear
  D)
  Copper sulphate + Zinc\[\to \] Zinc sulphate + Copper done clear
  View Solution play_arrow

• question_answer25)
  Select the one that should be used for treating a person stung by an ant.
  A)
  Sodium carbonate solution done clear
  B)
  Water   done clear
  C)
  Vinegar                        done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer26)
  ................ is present in grapes.
  A)
  Malic add        done clear
  B)
  Tartaric acid done clear
  C)
  Acetic acid                   done clear
  D)
  Citric acid done clear
  View Solution play_arrow

• question_answer27)
  Disposal of factory wastes in water bodies has been found to be harmful to water plants and animals. To prevent this the factory owner should:
  A)
  neutralize waste before disposal done clear
  B)
  make the waste acidic before disposal done clear
  C)
  make the waste basic before disposal done clear
  D)
  All of the above are correct done clear
  View Solution play_arrow

• question_answer28)
  Which of the following statements is correct?
  A)
  Products of neutralization reaction are salt and water. done clear
  B)
  Reactants of neutralization reaction are acid and alkali. done clear
  C)
  Any neutralization reaction is an exothermic reaction. done clear
  D)
  All the above are correct. done clear
  View Solution play_arrow

• question_answer29)
  Which of the following statements is correct?
  A)
  Hydrochloric acid turns red litmus to blue. done clear
  B)
  Sodium hydroxide turns blue litmus to red. done clear
  C)
  Both the above are correct. done clear
  D)
  None of these is correct. done clear
  View Solution play_arrow

• question_answer30)
  Which of the following statements is correct?
  A)
  Indicator is a substance that shows different colors in acidic and basic solution. done clear
  B)
  Turmeric stain on a white shut turns to red when it is washed with soap. done clear
  C)
  Lime water is a solution of calcium hydroxide. done clear
  D)
  All the above are correct. done clear
  View Solution play_arrow

• question_answer31)
  Which of the following statements is correct?
  A)
  Acids are corrosive in nature. done clear
  B)
  Excess of carbon dioxide in air can cause acid rain. done clear
  C)
  Excess of hydrochloric acid in stomach causes indigestion. done clear
  D)
  All the above are correct. done clear
  View Solution play_arrow

• question_answer32)
  A natural dye extracted from lichens and most commonly used as an indicator. What is its colour in distilled water?
  A)
  Blue (b)                        done clear
  B)
  Red done clear
  C)
  Mauve              done clear
  D)
  Colourless done clear
  View Solution play_arrow

• question_answer33)
  ............... changes odour in acidic and basic medium and is used as an olfactory indicator.
  A)
  Onion                          done clear
  B)
  Vanilla done clear
  C)
  Clove oil         done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer34)
  Neutral substances are:
  A)
  those substances which are slightly acidic or slightly basic in solution. done clear
  B)
  those substances which do not change the colour of either red or blue litmus done clear
  C)
  Both the above are correct done clear
  D)
  None of the above is correct done clear
  View Solution play_arrow

• question_answer35)
  Rain becomes acidic:
  A)
  because excess of carbon dioxide present in air get dissolved in rain drops to form carbonic acid. done clear
  B)
  oxides of nitrogen and sulphur present in air dissolve to form respective acids. done clear
  C)
  Both the above are correct done clear
  D)
  None of these is correct done clear
  View Solution play_arrow

• question_answer36)
  A base is a substance that
  A)
  feels slippery done clear
  B)
  tastes sour done clear
  C)
  reacts with metals to produce hydrogen gas done clear
  D)
  and (c) done clear
  View Solution play_arrow

• question_answer37)
  A neutralization reaction
  A)
  includes an acid and a base    done clear
  B)
  produces a salt done clear
  C)
  forms water done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer38)
  Which among the following is organic weak acid?
  A)
  Formic acid     done clear
  B)
  Sulphuric acid done clear
  C)
  Nitric acid       done clear
  D)
  Hydrochloric acid done clear
  View Solution play_arrow

• question_answer39)
  Which among the given acids is the strongest acid?
  A)
  Acetic acid       done clear
  B)
  Sulphuric acid done clear
  C)
  Formic acid                 done clear
  D)
  Tannic acid done clear
  View Solution play_arrow

• question_answer40)
  Which of the following is the weakest acid?
  A)
  Citric           done clear
  B)
  Sulphuric done clear
  C)
  Hydrochloric                done clear
  D)
  Nitric done clear
  View Solution play_arrow

• question_answer41)
  DIRECTION: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column - I (Acid)	Column-II (Natural Source of acid)
  (A) Acetic acid	(p) Spinach
  (B) Citric acid	(q) Tamarind
  (C) Tartaric acid	(r) Orange
  (D) Oxalic acid	(s) Vinegar

  A)
  A\[\to \] (p), B\[\to \] (q), C\[\to \] (r), D\[\to \] (s) done clear
  B)
  A\[\to \] (q), B\[\to \] (s), C\[\to \] (p), D\[\to \] (r) done clear
  C)
  A\[\to \] (r), B\[\to \] (p), C\[\to \] (s), D\[\to \] (q) done clear
  D)
  A\[\to \] (s), B\[\to \] (r), C\[\to \] (q), D\[\to \] (p) done clear
  View Solution play_arrow

• question_answer42)
  DIRECTION: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column - I	Column - II
  (A) Malic acid	(p) Window cleaner
  (B) Zinc carbonate	(q) Milk
  (C) Ammonium hydroxide	(r) Calamine
  (D) Lactice acid	(s) Apple

  A)
           A\[\to \] (s), B\[\to \] (q), C\[\to \] (p), D\[\to \] (r) done clear
  B)
  A\[\to \] (r), B\[\to \] (s), C\[\to \] (q), D\[\to \] (p) done clear
  C)
  A\[\to \] (s), B\[\to \] (r), C\[\to \] (p), D\[\to \] (q) done clear
  D)
  A\[\to \] (p), B\[\to \] (q), C\[\to \] (r), D\[\to \] (s) done clear
  View Solution play_arrow

• question_answer43)
  DIRECTION: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column - I	Column - II
  (A) Sting of an ant	(p) Litmus
  (B) Alkali	(q) Soluble base
  (C) Indicator	(r) Calamine
  (D) Bitter	(s) Formic acid

  A)
  A\[\to \] (s), B\[\to \] (p), C\[\to \] (q), D\[\to \] (r) done clear
  B)
  A\[\to \] (s), B\[\to \] (q), C\[\to \] (r), D\[\to \] (p) done clear
  C)
  A\[\to \] (s), B\[\to \] (q), C\[\to \] (p), D\[\to \] (r) done clear
  D)
  A\[\to \] (r), B\[\to \] (q), C\[\to \] (p), D\[\to \] (s) done clear
  View Solution play_arrow

• question_answer44)
  DIRECTION: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column - I	Column - II
  (A) Slaked lime	(p) Used in batteries
  (B) Vinegar	(q) Sour in taste
  (C) Sulphuric acid	(r) Apply on bee?s sting
  (D) Turmeric indicator	(s) Turns brown with the application of soap

  A)
  A\[\to \] (s), B\[\to \] (q), C\[\to \] (p), D\[\to \] (r) done clear
  B)
  A\[\to \] (r), B\[\to \] (q), C\[\to \] (p), D\[\to \] (s) done clear
  C)
  A\[\to \] (q), B\[\to \] (r), C\[\to \] (p), D\[\to \] (s) done clear
  D)
  A\[\to \] (r), B\[\to \] (q), C\[\to \] (s), D\[\to \] (p) done clear
  View Solution play_arrow

• question_answer45)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage ? 1 Observe the flow chart given below and answer the questions that follow: \[\text{Magnesium+Oxygen}\xrightarrow{\text{heat}}\text{''A''}\xrightarrow{\text{Water}}\text{''B''}\xrightarrow[\text{solution}]{\text{Red litmus}}\text{''C''}\] "A" in this represents
  A)
  magnesium oxide done clear
  B)
  magnesium hydroxide done clear
  C)
  both magnesium oxide and magnesium hydroxide done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer46)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage ? 1 Observe the flow chart given below and answer the questions that follow: \[\text{Magnesium+Oxygen}\xrightarrow{\text{heat}}\text{''A''}\xrightarrow{\text{Water}}\text{''B''}\xrightarrow[\text{solution}]{\text{Red litmus}}\text{''C''}\] "B" in this represents
  A)
  Magnesium                  done clear
  B)
  Magnesium oxide done clear
  C)
  Magnesium hydroxide done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer47)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage ? 1 Observe the flow chart given below and answer the questions that follow: \[\text{Magnesium+Oxygen}\xrightarrow{\text{heat}}\text{''A''}\xrightarrow{\text{Water}}\text{''B''}\xrightarrow[\text{solution}]{\text{Red litmus}}\text{''C''}\] "C" in it indicates that
  A)
  Red litmus when added to "B", no change in colour occurs. done clear
  B)
  Red litmus when added to "B" changes to blue. done clear
  C)
  Red litmus when added to "B" changes to green. done clear
  D)
  Red litmus when added to "B" it gives a colorless solution done clear
  View Solution play_arrow

• question_answer48)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage ? 2 The reaction between an acid and a base is known as neutralization reaction. In this reaction salt and water are produced with evolution of heat. Salt is a product formed as a result of neutralization reaction. Name the salt formed by reaction of sodium hydroxide and hydrochloric acid.
  A)
  sodium carbonate        done clear
  B)
  sodium bicarbonate done clear
  C)
  sodium chloride           done clear
  D)
  sodium sulphate done clear
  View Solution play_arrow

• question_answer49)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage ? 2 The reaction between an acid and a base is known as neutralization reaction. In this reaction salt and water are produced with evolution of heat. A neutralization reaction is:
  A)
  an exothermic reaction done clear
  B)
  endothermic reaction done clear
  C)
  accompained by absorption of heat done clear
  D)
  None of these is correct done clear
  View Solution play_arrow

• question_answer50)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage ? 2 The reaction between an acid and a base is known as neutralization reaction. In this reaction salt and water are produced with evolution of heat. Which of the following is not an example of neutralization?
  A)
  Taking antacid in case of acidity done clear
  B)
  Treating acidic soil with quick lime done clear
  C)
  Change in colour of blue litmus paper to red with acidic solution done clear
  D)
  Both (a) and (b) done clear
  View Solution play_arrow

• question_answer51)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 3 Rahul and Manish went to a party Rahul ate too much fast food in the party and after returning home was complaining about the stomachache. Manish was worried about his condition. They went to doctor. Doctor told them not to get worried as this is due to indigestion of food and gave him some medicines. Which of the following acid present in our stomach helps in digestion?
  A)
  Acetic acid done clear
  B)
  Oxalic acid done clear
  C)
  Hydrochloric acid done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer52)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 3 Rahul and Manish went to a party Rahul ate too much fast food in the party and after returning home was complaining about the stomachache. Manish was worried about his condition. They went to doctor. Doctor told them not to get worried as this is due to indigestion of food and gave him some medicines. Indigestion is caused by presence of excess of ........................... in the stomach?
  A)
  food material   done clear
  B)
  hydrochloric acid done clear
  C)
  baking soda                 done clear
  D)
  milk of magnesia done clear
  View Solution play_arrow

• question_answer53)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 3 Rahul and Manish went to a party Rahul ate too much fast food in the party and after returning home was complaining about the stomachache. Manish was worried about his condition. They went to doctor. Doctor told them not to get worried as this is due to indigestion of food and gave him some medicines. The medicines that are used to relieve us of indigestion are generally called
  A)
  antibiotic         done clear
  B)
  analgesic done clear
  C)
  antacid           done clear
  D)
  antipyretic done clear
  View Solution play_arrow

• question_answer54)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 3 Rahul and Manish went to a party Rahul ate too much fast food in the party and after returning home was complaining about the stomachache. Manish was worried about his condition. They went to doctor. Doctor told them not to get worried as this is due to indigestion of food and gave him some medicines. Which of the following is used as an antacid?
  A)
  Acetic acid                   done clear
  B)
  Sodium hydroxide done clear
  C)
  Magnesium hydroxide done clear
  D)
  Hydrochloric acid done clear
  View Solution play_arrow

• question_answer55)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 4 Indicators change their colour when added to a solution containing an acidic or a basic substance. Turmeric, litmus, China rose petals (Gudhal), etc., are some naturally occurring indicators. Naturally occurring indicator litmus
  A)
  is extracted from lichens done clear
  B)
  has available as red and blue litmus paper done clear
  C)
  has purple colour in distilled water done clear
  D)
  All the above are correct done clear
  View Solution play_arrow

• question_answer56)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 4 Indicators change their colour when added to a solution containing an acidic or a basic substance. Turmeric, litmus, China rose petals (Gudhal), etc., are some naturally occurring indicators. Which of the following statements is correct?
  A)
  Colour of litmus changes from blue to red in an acidic solution. done clear
  B)
  Colour of litmus changes from red to blue in an acidic solution. done clear
  C)
  Colour of litmus changes from pink to colourless in an acidic solution. done clear
  D)
  Colour of litmus changes from colourless to pink in a basic solution. done clear
  View Solution play_arrow

• question_answer57)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 4 Indicators change their colour when added to a solution containing an acidic or a basic substance. Turmeric, litmus, China rose petals (Gudhal), etc., are some naturally occurring indicators. Which of the following is correct about the indicator China rose?
  A)
  It is a natural indicator. done clear
  B)
  It gives green colour in an acidic solution. done clear
  C)
  It gives magenta colour in a basic solution. done clear
  D)
  All the above are correct. done clear
  View Solution play_arrow

• question_answer58)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 5 Consider the following substances and on that basis answer the following questions: Lemon juice, tomato juice, lime water, vinegar, sugar solution, solution of common salt. The number of acidic substances is:
  A)
   1                                 done clear
  B)
   2 done clear
  C)
   3                     done clear
  D)
   4 done clear
  View Solution play_arrow

• question_answer59)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 5 Consider the following substances and on that basis answer the following questions: Lemon juice, tomato juice, lime water, vinegar, sugar solution, solution of common salt. The number of basic substances is:
  A)
   1                                 done clear
  B)
   2 done clear
  C)
   3                                 done clear
  D)
   4 done clear
  View Solution play_arrow

• question_answer60)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 5 Consider the following substances and on that basis answer the following questions: Lemon juice, tomato juice, lime water, vinegar, sugar solution, solution of common salt. The number of neutral substances:
  A)
   1                                 done clear
  B)
   2 done clear
  C)
   3                                 done clear
  D)
   4 done clear
  View Solution play_arrow

• question_answer61)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Sulphuric acid is also known as oil of vitriol. Reason (R): It has oily appearance.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer62)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Rain containing excess amount of acid is called acid rain. Reason (R): Air pollutants like carbon dioxide, sulphur dioxide, nitrogen oxides dissolve in water to form carbonic acid, sulphuric acid and nitric acid.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer63)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Sodium hydroxide is an alkali. Reason (R): All bases are alkalies.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer64)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Toothpaste neutralised the acid produced by fermentation of food particles in mouth. Reason (R): Toothpaste is alkaline in nature.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer65)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Sugar is a neutral substance. Reason (R): A sugar solution turns red litmus blue.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer66)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Acids are sour in taste. Reason (R): Bases are soapy to touch and bitter in taste.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer67)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Orange juice turns blue litmus red (ii) Sting of an ant contains acetic acid
  A)
  Statement (i) is correct while statement (ii) is incorrect done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer68)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Baking soda is a mild base that is used in toothpastes and mouthwashes to neutralize acids, which can produce unpleasant odours. (ii) An alkali is a water soluble acid.
  A)
  Statement (i) is correct while statement (ii) is incorrect done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer69)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) All salts are neutral in nature. (ii) A solution of sodium chloride salt in water does not change the colour of any litmus paper.
  A)
  Statement (i) is correct while statement (ii) is incorrect done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer70)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Alkalies are sour to taste. (ii) Mineral acids change to organic acids on addition of water.
  A)
  Statement (i) is correct while statement (ii) is incorrect done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer71)
  DIRECTIONS: On the basis of following diagram/ picture answer the questions given below: Which of the following is the source of tartaric acid.
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer72)
  DIRECTIONS: On the basis of following diagram/ picture answer the questions given below: Which of the following will change red litmus paper to blue?
  A)
     done clear
  B)
  done clear
  C)
       done clear
  D)
  Both (a) and (b) done clear
  View Solution play_arrow

• question_answer73)
  A blue litmus paper was first dipped I dilute hydrochloric acid and then in dilute sodium hydroxide solution. It was observed that the colour of the litmus paper:
  A)
  changed to red done clear
  B)
  changed first to red and then to blue done clear
  C)
  changed blue to colourless done clear
  D)
  remained blue in both solutions. done clear
  View Solution play_arrow

• question_answer74)
  If you perform an experiment bare handed and you realise that your palm has become slippery and slimy. The most probable reason for this is that you have dropped:
  A)
  sodium hydroxide on your hands. done clear
  B)
  hydrochloric acid on your hands. done clear
  C)
  sodium chloride on your hands. done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer75)
  To test a solution in container 'A.' You dipped the filter paper in this solution and then in lime water. The colour of filter paper after dipping in lime water becomes brownish red. It shows that the solution in container 'A' was:
  A)
  Red litmus solution      done clear
  B)
  Methyl red solution done clear
  C)
  Turmeric solution done clear
  D)
  Phenolphthalein solution done clear
  View Solution play_arrow

• question_answer76)
  Which is responsible for the damaging effects caused by acid rain?
  A)
  Carbonic acid              done clear
  B)
  Sulphuric acid done clear
  C)
  Nitric acid                    done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer77)
  You dissolved a sample, in distilled water and then added a drop of this solution to a test-tube containing blue litmus solution which changes to red. It shows that the sample given to you is of:
  A)
  soap                             done clear
  B)
  tomato juice done clear
  C)
  baking soda                 done clear
  D)
  sugar done clear
  View Solution play_arrow

• question_answer78)
  When few drops of phenolphthalein are added to sample 'A' it turned pink. To this pink coloured solution we added a few drops of sample 'B'. With continuous stirring the pink colour disappears. Samples 'A' and 'B' are:
  A)
  sample 'A' is acidic and sample 'B' is basic. done clear
  B)
  sample 'A' is basic and sample 'B' is acidic. done clear
  C)
  sample 'A' is basic and sample 'B' is neutral. done clear
  D)
  sample 'A' is acidic and sample 'B' is neutral. done clear
  View Solution play_arrow

• question_answer79)
  You are provided with two solutions 'X' and 'Y?. The colour of turmeric stains on your clothes on coming in contact with solution 'X' changes to brick red and when in contact with solution 'Y' changes to yellow. The solution 'X' and 'Y' provided to you are respectively:
  A)
  Soap solution and lemon juice done clear
  B)
  Lemon juice and soap solution done clear
  C)
  Lemon juice and vinegar done clear
  D)
  Soap solution and sugar solution done clear
  View Solution play_arrow

• question_answer80)
  Following observation were recorded upon performing experiments with sample 'A' and sample 'B'. (i) When 2-3 drops of phenolphthalein are added to sample 'A' it becomes pink. (ii) When equal quantities of two samples are added in a test-tube, the test-tube becomes hot.
  A)
  sample 'A' is basic       done clear
  B)
  sample 'B' is acidic done clear
  C)
  (ii) observation confirms neutralisation done clear
  D)
  All the above are correct done clear
  View Solution play_arrow

• question_answer81)
  ............... is an acid-base indicator, its colour is yellow in basic medium and pink in acidic medium.
  A)
  Phenolphthalein done clear
  B)
  Methyl orange done clear
  C)
  Litmus done clear
  D)
  Both (a) and (b) are correct done clear
  View Solution play_arrow

• question_answer82)
  ............... is used to neutralize the acidic effect of ant bite by rubbing it at the point of ant bite.
  A)
  Moist baking soda        done clear
  B)
  Calamine solution done clear
  C)
  Both (a) and (b)           done clear
  D)
  Calcium carbonate done clear
  View Solution play_arrow

• question_answer83)
  ............... is used to treat a soil that is acidic and min which plants do not grow well.
  A)
  Quicklime done clear
  B)
  Slaked lime done clear
  C)
  Calcium oxide done clear
  D)
  Any one of (a), (b) or (c) done clear
  View Solution play_arrow

• question_answer84)
  Salts are compounds:
  A)
  having a bitter taste done clear
  B)
  having a sour taste done clear
  C)
  obtained as a result of neutralization reaction between acid and base. done clear
  D)
  All the above are correct done clear
  View Solution play_arrow

• question_answer85)
  Many salts absorb water (moisture) from the atmosphere. This property is called
  A)
  hydration       done clear
  B)
  dehydration done clear
  C)
  crystallization               done clear
  D)
  decantation done clear
  View Solution play_arrow

• question_answer86)
  The substances which form hydronium ions \[\left( {{\text{H}}_{\text{3}}}{{\text{O}}^{\text{+}}} \right)\] in water are called
  A)
  acids          done clear
  B)
  bases done clear
  C)
  alkalies                         done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer87)
  The compounds which produce hydroxyl ions\[\text{(O}{{\text{H}}^{\text{-}}}\text{)}\] in water are called
  A)
  alkalies                         done clear
  B)
  bases done clear
  C)
  acids                            done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer88)
  Metallic oxides dissolve in water to form
  A)
  acidic solution             done clear
  B)
  neutral solution done clear
  C)
  basic solution               done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer89)
  Non-metallic oxides react with water to form
  A)
  alkaline solution           done clear
  B)
  acidic solution done clear
  C)
  neutral solution            done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer90)
  A solution turns red litmus blue, its pH is likely to be
  A)
   1                                 done clear
  B)
   4 done clear
  C)
   5                                 done clear
  D)
   10 done clear
  View Solution play_arrow

• question_answer91)
  The acid present in tea is:
  A)
  tannic  done clear
  B)
  lactic done clear
  C)
  tartaric                         done clear
  D)
  citric done clear
  View Solution play_arrow

• question_answer92)
  Acid reacts with metal to form:
  A)
   \[\text{salt+C}{{\text{O}}_{\text{2}}}\]                 done clear
  B)
   salt + water done clear
  C)
   \[\text{salt+}{{\text{O}}_{\text{2}}}\]                                done clear
  D)
   \[\text{salt+}{{\text{H}}_{\text{2}}}\] done clear
  View Solution play_arrow

• question_answer93)
  Manisha took a little bit of soil from her garden and mixed it with water. When she dipped a blue litmus in it, the litmus turned red- By adding which of the following to her garden will she get better plant growth?
  A)
  Hydrochloric acid        done clear
  B)
  Slaked lime done clear
  C)
  Water               done clear
  D)
  Salt done clear
  View Solution play_arrow

• question_answer94)
  Common name of \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\] is:
  A)
  oil of vitriol      done clear
  B)
  muriatic acid done clear
  C)
  blue vitriol       done clear
  D)
  green vitriol done clear
  View Solution play_arrow

• question_answer95)
  Common name of copper sulphate is:
  A)
  chalk                            done clear
  B)
  quicklime done clear
  C)
  nitre                             done clear
  D)
  blue vitriol done clear
  View Solution play_arrow

• question_answer96)
  The waste from a paper factory contains high amount of hydrochloric acid. How should we treat the waste, before disposal, to make it safe?
  A)
  Treat it with chemicals containing sodium hydroxide done clear
  B)
  Treat it with chemicals containing sulphuric acid done clear
  C)
  Treat it with chemicals containing sodium chloride done clear
  D)
  Treat it with pure hydrochloric acid done clear
  View Solution play_arrow

• question_answer97)
  Read the following statements: (i) It is a reaction between an acid and a base. (ii) Salt and water are produced in this reaction. (iii) It is an exothermic reaction. Which reaction is being referred to?
  A)
  Displacement reaction done clear
  B)
  Neutralization reaction done clear
  C)
  Redox reaction done clear
  D)
  Decomposition reaction done clear
  View Solution play_arrow

• question_answer98)
  Study the table carefully

  	Sample	Blue litmus to red	Red litmus to blue
  (i)	Tamarind juice	√	×
  (ii)	Sugar syrup	×	√
  (iii)	Lime water	×	√
  (iv)	Soap solution	√	×

  Which of the above are correctly matched?
  A)
   (i) & (iii)                     done clear
  B)
   (ii) & (iv) done clear
  C)
   (i), (ii) & (iii)               done clear
  D)
   (i), (iii) & (iv) done clear
  View Solution play_arrow

• question_answer99)
  The two types of litmus paper are:
  A)
  blue and red    done clear
  B)
  blue and yellow done clear
  C)
  red and green               done clear
  D)
  yellow and red done clear
  View Solution play_arrow

• question_answer100)
  In acids, methyl orange turns:
  A)
  yellow                          done clear
  B)
  green done clear
  C)
  red                   done clear
  D)
  white done clear
  View Solution play_arrow

• question_answer101)
  In bases, methyl orange turns:
  A)
  green                            done clear
  B)
  black done clear
  C)
  red                               done clear
  D)
  yellow done clear
  View Solution play_arrow

• question_answer102)
  Phenolphthalein turns_______ in acidic and neutral solutions.
  A)
  colourless       done clear
  B)
  pink done clear
  C)
  red                               done clear
  D)
  green done clear
  View Solution play_arrow

• question_answer103)
  Lime water is a solution of:
  A)
   \[\text{Ca(OH}{{\text{)}}_{\text{2}}}\]in water     done clear
  B)
   \[\text{CaC}{{\text{l}}_{\text{2}}}\] in water done clear
  C)
   \[\text{NaOH}\] in water        done clear
  D)
   \[\text{NaCl}\] in water done clear
  View Solution play_arrow

• question_answer104)
  Silver and gold are purified with:
  A)
  nitric acid      done clear
  B)
  \[\text{HCl}\] done clear
  C)
  acetic acid      done clear
  D)
  sulphuric acid done clear
  View Solution play_arrow

• question_answer105)
  Soluble bases are called:
  A)
  salts                             done clear
  B)
  acids done clear
  C)
  alkalies             done clear
  D)
  All the three done clear
  View Solution play_arrow

• question_answer106)
  Caustic soda is the common name for:
  A)
   \[\text{Mg(OH}{{\text{)}}_{\text{2}}}\]                  done clear
  B)
   \[\text{KOH}\] done clear
  C)
   \[\text{Ca(OH}{{\text{)}}_{\text{2}}}\]                  done clear
  D)
   \[\text{NaOH}\] done clear
  View Solution play_arrow

• question_answer107)
  Calcium hydroxide (slaked lime) is used in:
  A)
  plastics and dyes          done clear
  B)
  fertilizers done clear
  C)
  antacid            done clear
  D)
  whitewashing done clear
  View Solution play_arrow

• question_answer108)
  DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column - I (Common name)	Column - II (Chemical name/ Chemical present)
  (A) Slaked lime	(p) Zinc carbonate
  (B) Baking soda	(q) Calcium hydroxide
  (C) Calamine solution	(r) Sodium bicarbonate
  (D) Milk of Magnesia	(s) Magnesium hydroxide

  A)
  (A) \[\to \] (p), (B) \[\to \] (q), (C) \[\to \] (r), (D) \[\to \] (s) done clear
  B)
  (A) \[\to \] (q), (B) \[\to \] (r), (C) \[\to \] (p), (D) \[\to \] (s) done clear
  C)
  (A) \[\to \] (r), (B) \[\to \] (s), (C) \[\to \] (q), (D) \[\to \] (p) done clear
  D)
  (A) \[\to \] (s), (B) \[\to \] (p), (C) \[\to \] (q), (D) \[\to \] (r) done clear
  View Solution play_arrow

• question_answer109)
  DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column - I	Column - II
  (A) Oxalic acid	(p) As an eye-wash, antiseptic and grain preservation
  (B) Nitric acid	(q) For making explosives
  (C) Boric acid	(r) In food preservation
  (D) Benzoic acid	(s) As a constituent of ink stain remover

  A)
  (A) \[\to \] (s), (B) \[\to \] (q), (C) \[\to \] (r), (D) \[\to \] (p) done clear
  B)
  (A) \[\to \] (q), (B) \[\to \] (s), (C) \[\to \] (p), (D) \[\to \] (r) done clear
  C)
  (A) \[\to \] (r), (B) \[\to \] (q), (C) \[\to \] (p), (D) \[\to \] (s) done clear
  D)
  (A) \[\to \] (s), (B) \[\to \] (q), (C) \[\to \] (p), (D) \[\to \] (r) done clear
  View Solution play_arrow

• question_answer110)
  DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column - I	Column - II
  (A) Fertilizer	(p) King of chemicals
  (B) Sulphuric acid	(q) Basic
  (C) Lime water	(r) Magnesium hydroxide
  (D) Milk of magnesia	(s) Potassium nitrate

  A)
  (A) \[\to \] (s), (B) \[\to \] (p), (C) \[\to \] (q), (D) \[\to \] (r) done clear
  B)
  (A) \[\to \] (q), (B) \[\to \] (s), (C) \[\to \] (p), (D) \[\to \] (r) done clear
  C)
  (A) \[\to \] (r), (B) \[\to \] (p), (C) \[\to \] (s), (D) \[\to \] (q) done clear
  D)
  (A) \[\to \] (s), (B) \[\to \] (r), (C) \[\to \] (q), (D) \[\to \] (p) done clear
  View Solution play_arrow

• question_answer111)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 The rain which contains a higher level of acid than normal is called acid rain. Acidic gases like sulphur dioxide, nitrogen dioxide and carbon dioxide which are released as pollutants during the burning of various types of faels dissolve in rain drops and when these rain drops fall as rain on earth, we call it acid rain. Nonmetallic oxides react with water to form:
  A)
  acids                done clear
  B)
  bases done clear
  C)
  salt                               done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer112)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 The rain which contains a higher level of acid than normal is called acid rain. Acidic gases like sulphur dioxide, nitrogen dioxide and carbon dioxide which are released as pollutants during the burning of various types of faels dissolve in rain drops and when these rain drops fall as rain on earth, we call it acid rain. \[\text{C}{{\text{O}}_{\text{2}}}\] dissolves in a water to form:
  A)
   \[\text{C+}{{\text{H}}_{\text{2}}}+{{\text{O}}_{\text{2}}}\]               done clear
  B)
   \[\text{C}{{\text{H}}_{\text{4}}}\] done clear
  C)
   \[\text{CO}\]                          done clear
  D)
  carbonic acid done clear
  View Solution play_arrow

• question_answer113)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 The rain which contains a higher level of acid than normal is called acid rain. Acidic gases like sulphur dioxide, nitrogen dioxide and carbon dioxide which are released as pollutants during the burning of various types of faels dissolve in rain drops and when these rain drops fall as rain on earth, we call it acid rain. Sulphuric acid is formed when ____ reacts with water.
  A)
   \[\text{S}{{\text{O}}_{\text{2}}}\]                                      done clear
  B)
   S done clear
  C)
   \[\text{S}{{\text{O}}_{\text{3}}}\]             done clear
  D)
   \[{{\text{O}}_{\text{2}}}\] done clear
  View Solution play_arrow

• question_answer114)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 The rain which contains a higher level of acid than normal is called acid rain. Acidic gases like sulphur dioxide, nitrogen dioxide and carbon dioxide which are released as pollutants during the burning of various types of faels dissolve in rain drops and when these rain drops fall as rain on earth, we call it acid rain. What is the main cause of acid rain?
  A)
  Pollution done clear
  B)
  Deforestation done clear
  C)
  Excessive rains done clear
  D)
  All factors are equally effective done clear
  View Solution play_arrow

• question_answer115)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Three different substances were taken and tested with litmus paper. The results are given below. Based on the results answer the questions 43 to 48.

  Type of Litmus	X	Y	Z
  Red litmus	turns blue	no change	no change
  Blue litmus	no litmus	turns red	no change

  What could be the substance X?
  A)
  An acid                        done clear
  B)
  A base done clear
  C)
  Water                           done clear
  D)
  Salt done clear
  View Solution play_arrow

• question_answer116)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Three different substances were taken and tested with litmus paper. The results are given below. Based on the results answer the questions 43 to 48.

  Type of Litmus	X	Y	Z
  Red litmus	turns blue	no change	no change
  Blue litmus	no litmus	turns red	no change

  What could be the substance Y?
  A)
  An acid                        done clear
  B)
  A base done clear
  C)
  Water                           done clear
  D)
  Salt done clear
  View Solution play_arrow

• question_answer117)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Three different substances were taken and tested with litmus paper. The results are given below. Based on the results answer the questions 43 to 48.

  Type of Litmus	X	Y	Z
  Red litmus	turns blue	no change	no change
  Blue litmus	no litmus	turns red	no change

  What could be the substance Z?
  A)
  Water               done clear
  B)
  Salt done clear
  C)
  Either A or B done clear
  D)
  Either an acid or a base done clear
  View Solution play_arrow

• question_answer118)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Three different substances were taken and tested with litmus paper. The results are given below. Based on the results answer the questions 43 to 48.

  Type of Litmus	X	Y	Z
  Red litmus	turns blue	no change	no change
  Blue litmus	no litmus	turns red	no change

  How can you obtain the substance Z?
  A)
  By the reaction of X and Y done clear
  B)
  By dissolving X in water done clear
  C)
  By dissolving Y in water done clear
  D)
  Cannot be said done clear
  View Solution play_arrow

• question_answer119)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Three different substances were taken and tested with litmus paper. The results are given below. Based on the results answer the questions 43 to 48.

  Type of Litmus	X	Y	Z
  Red litmus	turns blue	no change	no change
  Blue litmus	no litmus	turns red	no change

  Which of the following could be the substance Z?
  A)
   \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]                      done clear
  B)
   \[\text{HN}{{\text{O}}_{\text{3}}}\] done clear
  C)
   \[\text{KOH}\]                        done clear
  D)
   \[{{\text{H}}_{\text{2}}}\text{O}\] done clear
  View Solution play_arrow

• question_answer120)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Three different substances were taken and tested with litmus paper. The results are given below. Based on the results answer the questions 43 to 48.

  Type of Litmus	X	Y	Z
  Red litmus	turns blue	no change	no change
  Blue litmus	no litmus	turns red	no change

  How will the substance X behave with phenolphthalein?
  A)
  It turns pink done clear
  B)
  It remains colorless done clear
  C)
  It turns blue done clear
  D)
  It turns red done clear
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• question_answer121)
  DIRECTIONS: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Turmeric is a neutral indicator. Reason (R): Turmeric acquires orange colour in alkaline solution.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer122)
  DIRECTIONS: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Salts are the products of an acid- base reaction. Reason (R): Salt may be acidic or basic.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer123)
  DIRECTIONS: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Neutralization reaction is accompanied by evolution of heat. Reason (R): Neutralization reaction is a reaction between an acid and a base to form salt and water.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer124)
  DIRECTIONS: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): The substance which shows the nature of a solution as acidic or basic with the change in colour are called indicators. Reason (R): Red litmus turns blue in a solution containing vitamin 'C'.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer125)
  DIRECTIONS: Read the following three statements and choose the correct answer. (i) The salt formed by the neutralization of \[\text{NaOH}\] with \[\text{HCl}\] is basic in nature. (ii) Milk of magnesia contains magnesium hydroxide. (iii) Bases have pH from 1 to 7.
  A)
  Statement (i) and (iii) are incorrect but (ii) is correct done clear
  B)
  Statement (i) and (ii) are incorrect but (iii) is correct done clear
  C)
  All statements are correct done clear
  D)
  All statements are incorrect done clear
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• question_answer126)
  DIRECTIONS: Read the following three statements and choose the correct answer. (i) Phenolphthalein is a natural indicator. (ii) Sodium carbonate is commonly known as caustic soda. (iii) Universal indicator is made up of a mixture of different dyes.
  A)
  Statement (i) and (iii) are incorrect but (ii) is correct done clear
  B)
  Statement (i) and (ii) are incorrect but (iii) is correct done clear
  C)
  All statements are correct done clear
  D)
  All statements are incorrect done clear
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• question_answer127)
  DIRECTIONS: Read the following three statements and choose the correct answer. (i) If the soil is basic then compost is added to it to neutralize the basic nature of soil. (ii) China rose indicator changes colour to dark pink in acidic media and green in basic media. (iii) Tomato contains acetic acid.
  A)
  Statement (i) and (iii) are incorrect but (ii) is correct done clear
  B)
  Statement (i) and (ii) are incorrect but (iii) is correct done clear
  C)
  All statements are correct done clear
  D)
  All statements are incorrect done clear
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• question_answer128)
  DIRECTIONS: On the basis of following diagram/picture answer the questions given below: In an experiment about 10 ml of sodium hydroxide solution was taken in a beaker 'A'. To it was added a few drops of red litmus solution which turned blue. This solution was then taken in beaker 'B' and vinegar was added to it drop by drop with continuous stirring. It was observed that the colour of solution in beaker 'B' has changed to red. This experiment shows:      
  A)
  Saponification             done clear
  B)
  Acidification done clear
  C)
  Neutralization              done clear
  D)
  Both (b) and (c) done clear
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• question_answer129)
  DIRECTIONS: On the basis of following diagram/picture answer the questions given below: Study the following chart and Identify 'A' and 'B'.             A                                                          B
  A)
  Sodium hydroxide                               Sodium chloride done clear
  B)
  Hydrochloric acid                                Sodium hydroxide done clear
  C)
  Sodium hydroxide acid                                    Aluminum hydroxide done clear
  D)
  Hydrochloric acid                                Sodium chloride done clear
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• question_answer130)
  DIRECTIONS: On the basis of following diagram/picture answer the questions given below: In three test- tubes 'A', 'B', 'C' with solutions of different substances were added a few drops of China rose indicator. The colours shows in these test-tubes were magenta, colourless and green respectively Select the correct set indicating the substance whose solution are there in these test-tubes.
  A)

  ?A?	?B?	?C?
  Sugar solution	Lime water	Lime juice

  done clear
  B)

  ?A?	?B?	?C?
  Sugar solution	Lime juice	Lime water

  done clear
  C)

  ?A?	?B?	?C?
  Lime water	Sugar Solution	Lime juice

  done clear
  D)

  ?A?	?B?	?C?
  Lime juice	Sugar solution	Lime water

  done clear
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