CBSE Class 10 Chemistry Revision Worksheet Set H

CBSE Class 10 Chemistry Worksheet - SA1

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Answer the following:

1. What are acids and bases?

2. Name an acid-base indicator prepared at home.

3. Why should water be never added to conc. acid?

4. What are antacids? Give two examples.

5. What effect does the conc. H+ have on the acidic nature of the solution?

6. What is common name of the compound CaOCl2?

7. State the chemical name of Plaster of Paris. Write a chemical equation to show the reaction between POP and water.

8. What is the colour of FeSO4 .7H2O crystals? How does this colour change on heating? Give the balanced chemical equation for the change.

9. Write balanced equations for the reactions:

i) Dilute sulphuric acid reacts with zinc granules.

ii) Dilute hydrochloric acid reacts with magnesium ribbon.

iii) Dilute sulphuric acid reacts with aluminium powder.

Iv) Dilute hudrochloric acid reacts with iron filings.

10. Why does distilled water not conduct electricity where as rain water does?

11. a) What is universal indicator ?

b) Write the chemical equation involved in the preparation of sodium hydroxide. Name the process.

12. A milk man adds a very small amount of baking soda to fresh milk.

a)Why does he shift the Ph of the fresh milk from 6 to slightly alkaline ?

b) What do you expect to observe when the milk comes to a boil?

c) Why does this milk take a long time to set as curd ?

13. What is neutralization reaction? Give two examples.

14. What is pH scale? Given below are the pH values of four liquids.

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