- Give two examples each of strong acids and strong bases.
- Name three acids obtained from natural sources.
- A student dropped a few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was passed through lime water . What changes would be observed in lime water? Write balanced chemical equations for both the changes observed.
- During summer season , a milkman usually adds a very small amount of baking soda to fresh milk. Give one reason.
- Tap water conducts electricity whereas distilled water does not. Why?
- Dry hydrogen chloride gas does not turn blue litmus red whereas hydrochloric acid does . Give one reason.
- Name the gas evolved when dilute HCl reacts with sodium hydrogen carbonate . How is it recognized?
