1. A solution turns red litmus blue, its pH is likely to be    [    ]

    2. A) 1        B) 4       C) 5       D) 10

  2. One of the following solution reacts with crushed egg-shells to give a gas that turns lime- water milky the solution is of   [    ]

    3. A) NaCl       B) HCl        C) LiCl       D) KCl

  3. If a base dissolves in water by what name is it better known?   [    ]
    4. A. Sodium thiosulphate and sulphur dioxide

    B. Hydrochloric acid and sodium hydroxide

    C. Chlorine and oxygen

    D. Nitric acid and sodium hydrogen carbonate

  4. What colour would hydrochloric acid (pH=1) turn universal indicator?

    [    ]

    5. A) orange       B) purple       C) yellow       D) red

  5. Which one of the following types of medicines is used for treating indigestion? 

    6. [    ]

    A) antibiotic       B) analgesic       C) antacid       D) antiseptic

  6. What gas is produced when magnesium is made to react with hydrochloric acid?

    7. [    ]

    A) hydrogen       B) oxygen       C) carbon dioxide       D) no gas is

    produced

Suggested Experiments
  1. Compounds such as alcohols and glucose contain hydrogen but are not categorized as acids. Describe an activity to prove it
  2. What is meant by “water of crystallization” of a substance? Describe an activity to show the water of crystallization.
Suggested Projects
  1. How do you Select a good place to plant a tree in your school / at home.Test the soil and investigate and write a report on it.
  2. Do all vegetables are acids?To find this investigate with pH paper and tabulate the values and write a report on it.
  3. Collect information about importance of the pH value in daily life to human beings as well as plants

    4.


    page no: 56

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