LONG ANSWER TYPE QUESTIONS
1. What is baking soda? How is it obtained from sodium chjloride? Mention any two uses of
baking soda.
2. What is the commercial name of bleaching powder? How is bleaching powder prepared?
What are its different uses?
3. What do you mean by the strength of an acid? What are strong and weal acids?
4. What do you mean by the strength of a base? What are strong and weak base?
5. Three test tubes A, B and C contain distilled water, a basic solution and an acid solution
separately. How would you identify the contents of the test tubes with the help of a red
litmus paper only?
6. What are the different uses of sodium carbonate (Washing soda)?
7. State the important properties of washing soda.
8. What happens when carbon dioxide gas is passed through limewater? Give equations for
the reactions that take place.
9. With the help of universal indicator the pH values of solutions A, B, C, D and E were
found to be 5, 2, 12, 7 and 10 respectively. Say which solution is
(i) neutral
(ii) strongly base
(iii) strongly acidic
(iv) weakly acid
(v) weakly basic
Arrange the pH in the increasing order of H+ ions configuration.
10. Discuss briefly the reactions occurring when a concentrated solution of sodium chloride
(brine) is electrolyzed?
11. Explain how is washing soda produced using sodium chloride as one of the raw materials?
12. (a) What is a salt? Give the names and formula of any two salts. Also name the acids and
bases from which these salts may be ob ained.
(b) What is meant by hydrated and anhydrous salts? Explain with example.
13. (a) What is plaster of paris? Write its chemical formula.
(b) How is plaster of paris prepared? Write the chemical equation of the reaction involved.
(c) Explain why plaster of paris should be stored in a moisture proof container.
(d) State two important uses of plaster of paris.
14. (a) What is bleaching powder? Write its chemical formula.
(b) How is bleaching powder prepared? Write the chemical equation of the reaction
involved.
(c) State two important uses of bleaching powder.
15. (a) What happens when zinc granules are heated with sodium hydroxide solution? Write
chemical equation of the reaction which takes place.
(b) What happens when basses react with nonmetals oxides? Explain with the help of an
example. What does this reaction tell us about the nature of non-metal oxides?
1. What is baking soda? How is it obtained from sodium chjloride? Mention any two uses of
baking soda.
2. What is the commercial name of bleaching powder? How is bleaching powder prepared?
What are its different uses?
3. What do you mean by the strength of an acid? What are strong and weal acids?
4. What do you mean by the strength of a base? What are strong and weak base?
5. Three test tubes A, B and C contain distilled water, a basic solution and an acid solution
separately. How would you identify the contents of the test tubes with the help of a red
litmus paper only?
6. What are the different uses of sodium carbonate (Washing soda)?
7. State the important properties of washing soda.
8. What happens when carbon dioxide gas is passed through limewater? Give equations for
the reactions that take place.
9. With the help of universal indicator the pH values of solutions A, B, C, D and E were
found to be 5, 2, 12, 7 and 10 respectively. Say which solution is
(i) neutral
(ii) strongly base
(iii) strongly acidic
(iv) weakly acid
(v) weakly basic
Arrange the pH in the increasing order of H+ ions configuration.
10. Discuss briefly the reactions occurring when a concentrated solution of sodium chloride
(brine) is electrolyzed?
11. Explain how is washing soda produced using sodium chloride as one of the raw materials?
12. (a) What is a salt? Give the names and formula of any two salts. Also name the acids and
bases from which these salts may be ob ained.
(b) What is meant by hydrated and anhydrous salts? Explain with example.
13. (a) What is plaster of paris? Write its chemical formula.
(b) How is plaster of paris prepared? Write the chemical equation of the reaction involved.
(c) Explain why plaster of paris should be stored in a moisture proof container.
(d) State two important uses of plaster of paris.
14. (a) What is bleaching powder? Write its chemical formula.
(b) How is bleaching powder prepared? Write the chemical equation of the reaction
involved.
(c) State two important uses of bleaching powder.
15. (a) What happens when zinc granules are heated with sodium hydroxide solution? Write
chemical equation of the reaction which takes place.
(b) What happens when basses react with nonmetals oxides? Explain with the help of an
example. What does this reaction tell us about the nature of non-metal oxides?
