Railways General Science & Technology Acids, Bases and Salts / अम्ल, क्षार एवं लवण Sample Paper

done Acids and Bases Sample Test Paper-16 Total Questions - 20    [Download]

• question_answer1)
  Which of the following is acidic in nature?
  A)
   Sugar
  done clear
  B)
          lime
  done clear
  C)
   Baking powder
  done clear
  D)
   vinegar
  done clear
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• question_answer2)
  An element common to all acids is
  A)
   Hydrogen         
  done clear
  B)
   oxygen
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  C)
   Sulphur
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  D)
   chlorine
  done clear
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• question_answer3)
  Baking soda is also known as
  A)
   Sodium bicarbonate
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  B)
   sodium carbonate
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  C)
   Calcium chloride
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  D)
   calcium carbonate
  done clear
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• question_answer4)
  What is the pH of pure water?
  A)
   1        
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  B)
   7
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  C)
   5                    
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  D)
   12
  done clear
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• question_answer5)
  Match the Column I with the Column II.

  	Column I		Column II
  A.	Tartaric acid	1.	Red ants
  B.	Formic acid	2.	Grapes
  C.	Uric acid	3.	Apples
  D.	Maleic acid	4.	Urine of mammals

  Codes:
  A)
   A-2, B-1, C-4, D-3
  done clear
  B)
   A-1, B-4, C-3, D-2
  done clear
  C)
   A-4, B-3, C-2, D-1
  done clear
  D)
   A-3, B-2, C-1, D-4
  done clear
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• question_answer6)
  Acid turns blue litmus red and base turns red litmus blue. A student tested a liquid with a red litmus paper which remained red with no change. This shows that the liquid
  A)
   Is not a base
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  B)
   Is not an acid
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  C)
   is neither an acid nor a base
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  D)
   None of these
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• question_answer7)
  Which one of the following statements is correct?
  A)
   All bases are alkali
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  B)
   None of the bases is alkali
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  C)
   There are no more bases except the alkalies
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  D)
   All alkalies are bases but all bases are not alkalies
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• question_answer8)
  A base is a substance which
  A)
   is bitter in taste
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  B)
   Given\[OH-\] ions in aqueous solution
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  C)
   Can donate electron
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  D)
   All of the above
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• question_answer9)
  The pH of water at \[25{}^\circ C\] is 7. When it is heated to \[100{}^\circ C,\] the pH of water
  A)
   Increase
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  B)
   Decreases
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  C)
   remains same
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  D)
   Decreases up to \[50{}^\circ C\]and then increases
  done clear
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• question_answer10)
  Match the Column I with me Column II.

  	Column I		Column II
  A.	\[{{10}^{-7}}\]	1.	pH value of neutral solution
  B.	\[>7\]	2.	pH value of acidic solution
  C.	\[<7\]	3.	pH value of alkaline solution
  D.	7	4.	In pure ion concentration

  Codes:
  A)
   A-1, B-4, C-3, D-2
  done clear
  B)
   A-2, B-1, C-4, D-3
  done clear
  C)
   A-3, B-2, C-1, D-4
  done clear
  D)
   A-4, B-3, C-2, D-1
  done clear
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• question_answer11)
  Which one of the following is correct? Due to continuous use of calcium superphosphate as fertilizer in soil, the pH of soil becomes
  A)
   More than 7
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  B)
   less than 7
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  C)
   Equal to 7        
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  D)
   cannot be predicted
  done clear
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• question_answer12)

  Consider the following statements

  1. Acids are sour in taste and change the colour of blue litmus to red.

  2. Bases are bitter and change the colour of red litmus to blue.

  3. Litmus is a natural indicator.

  Which of the statements above are correct?

  A)
   1 and 2
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  B)
   1 and 3
  done clear
  C)
   1 and 3
  done clear
  D)
   1, 2 and 3
  done clear
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• question_answer13)

  Study the following statements

  1. Litmus solution is a purple dye which is extracted from lichen and is commonly used as an indicator.

  2. Red cabbage leaves, turmeric, coloured petals of some flowers indicate the presence of acid or base in a solution.

  3. Some substances whose odour changes in acidic or basic medium are called olfactory indicators.

  Which of the statements given above are correct?

  A)
   1, 2 and 3        
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  B)
   1 and 2
  done clear
  C)
   1 and 3
  done clear
  D)
   2 and 3
  done clear
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• question_answer14)
  Which one of the following can be used as an acid-base indicator by a visually impaired student?
  A)
   Litmus 
  done clear
  B)
   Vanilla essence
  done clear
  C)
   Turmeric          
  done clear
  D)
   Petunia leaves
  done clear
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• question_answer15)
  The composition of aqua regia is
  A)
   Cone. \[{{H}_{2}}S{{O}_{4}}\] And cone.\[HCI\]In ratio of 1 : 3
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  B)
   Cone. \[HN{{O}_{3}}\] And cone.\[HCI\] In ratio of 1 : 3
  done clear
  C)
   Cone. \[HN{{O}_{3}}\] and cone. \[HCI\] In ratio of 3 : 1
  done clear
  D)
   Cone. \[{{H}_{2}}S{{O}_{4}}\]And cone.\[HN{{O}_{3}}\] In ratio of 3 : 1
  done clear
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• question_answer16)

  Which of the following statements is correct about an aqueous solution of an acid and of a base?

  (i) Higher the pH, strong the acid

  (ii) Higher the pH, weaker the acid

  (iii) Lower the pH, stronger the base

  (iv) Lower the pH, weaker the base

  A)
   (i) and (iii)
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  B)
   (i) and (iv)
  done clear
  C)
   (ii) and (iii)       
  done clear
  D)
   (ii) and (iv)
  done clear
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• question_answer17)
  A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish orange. Which of the following would change the colour of this pH paper to greenish-blue?
  A)
   Lemon juice     
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  B)
   An antacid
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  C)
   Common salt   
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  D)
   Vinegar
  done clear
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• question_answer18)
  The pH of fresh ground water slightly decreases upon exposure to air because
  A)
   Carbon dioxide from air is dissolved in the water
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  B)
   Oxygen from air is dissolved in the water
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  C)
   The dissolved carbon dioxide of the ground water escapes into air
  done clear
  D)
   The dissolved oxygen of the ground water escapes into air
  done clear
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• question_answer19)
  Match the Column I with the Column II.

  	Column I		Column II
  A.	7.35 to 7.45	1.	Milk
  B.	6.6	2.	Human blood
  C.	8.5	3.	Wine
  D.	2.8	4.	Sea water

  Codes:
  A)
   A-1, B-4, C-3, D-2
  done clear
  B)
   A-2, B-1, C-4, D-3
  done clear
  C)
   A-4, B-3, C-2, D-1
  done clear
  D)
   A-3, B-2, C-1, D-4
  done clear
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• question_answer20)
  Human stomach produces acid 'X' which helps in digestion of food. Acid 'X' is
  A)
   Acetic acid       
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  B)
   methanoic acid
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  C)
   Hydrochloric acid
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  D)
   citric acid
  done clear
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