Main long questions of acid base and.salt
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Sample Paper
Acids, Bases and Salts
1. How will you test for a gas which is liberated when HCL reacts with an active metal? (CBSE 2008)
2. What is baking powder? How does it make the cake soft and spongy? (CBSE 2008)
3. When fresh milk is changed into curd will its pH value increase or decrease? Why?
4. Give Arrhenius definition of an acid and a base. (CBSE 2009)
5. What happens chemically when quick lime is added to water? (CBSE 2008)
6. Name the gas evolved when dilute HCL reacts with Sodium hydrogen carbonate. How is it recognized? (CBSE 2008)
7. How does the flow of acid rain water into a river make the survival of aquatic life in the river difficult? (CBSE 2008)
8. How is the pH of a solution of an acid influenced when it is diluted? (CBSE 2008 F)
9. How does the pH of the solution change when a solution of base is diluted? (CBSE 2008 F)
10. Arrange these in increasing order of their pH values- NaOH, blood, lemon