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

done Self Test-4 Total Questions - 10

• question_answer1)
  Hydrochloric acid is the concentrated acid. Which one of the following organs secretes hydrochloric acid in the human body?
  A)
   Eyes done clear
  B)
   Ears           done clear
  C)
   Heart done clear
  D)
   Stomach done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer2)
  Indicators are used to indicate the nature of the substance. Which one of the following is called natural indicator?
  A)
   Phenolphthalein done clear
  B)
   Methyl done clear
  C)
   Litmus done clear
  D)
   All of these done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer3)
  From the options given below, choose the correct option for the natural colour of litmus?
  A)
   Red done clear
  B)
   Purple          done clear
  C)
   Blue done clear
  D)
   Yellow done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer4)
  Which one of the following is obtained from tree for the making of litmus?
  A)
   Lichen done clear
  B)
   Banyan done clear
  C)
   Peepal done clear
  D)
   All of these done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer5)
  Litmus is the natural indicator. Which one of the following is called synthetic indicator?
  A)
   Phenolphthalein done clear
  B)
   Acidic solution done clear
  C)
   Basic solution done clear
  D)
   All of these done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer6)
  A rose is used as the indicator in the chemical laboratory. Name it
  A)
   Red rose done clear
  B)
   Blue rose done clear
  C)
   China rose done clear
  D)
   All of these done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer7)
  What is the Ph value of a strong acid, if indicator turns from blue to red?
  A)
   4 done clear
  B)
   12            done clear
  C)
   3 done clear
  D)
   1 done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer8)
  Dark blue is the colour of indicator on dissolving into which one of the following solution?
  A)
   Sulphur done clear
  B)
   Ammonia done clear
  C)
   Oxygen done clear
  D)
   Hydrogen done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer9)
  Ph value of a solution is 10. What is the nature of the solution?
  A)
   Acid done clear
  B)
   Base done clear
  C)
   Salt done clear
  D)
   All of these done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer10)
  Which one of the following is the formula of nitric acid?
  A)
     done clear
  B)
    done clear
  C)
    done clear
  D)
   All of these done clear
  E)
   None of these done clear
  View Solution play_arrow