Give reasons for the following. 1) Why do we add salt to water during

1.	Give reasons for the following. 1) Why do we add salt to water during electrolysis of water? 2) Why does hydrogen gas put off the burning splinter and it burns with blue flame? 3) Why does carbon dioxide turn lime water milky?
Answer» 1) Pure water is a bad conductor of electricity. By adding a small amount of salt the solution becomes conductor of electricity. 2) Hydrogen does not support combustion. So it puts off the burning splinter and also it is combustible. So burns with blue flame. 3) When we pass carbon dioxide through lime water it turns into milky because lime water (calcium hydroxide) reacts with carbon dioxide and forms a white milky substance, i.e. calcium carbonate.

Give reasons for the following. 1) Why do we add salt to water during electrolysis of water? 2) Why does hydrogen gas put off the burning splinter and it burns with blue flame? 3) Why does carbon dioxide turn lime water milky?

Answer»

1) Pure water is a bad conductor of electricity. By adding a small amount of salt the solution becomes conductor of electricity.

2) Hydrogen does not support combustion. So it puts off the burning splinter and also it is combustible. So burns with blue flame.

3) When we pass carbon dioxide through lime water it turns into milky because lime water (calcium hydroxide) reacts with carbon dioxide and forms a white milky substance, i.e. calcium carbonate.

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Give reasons for the following. 1) Why do we add salt to water during electrolysis of water? 2) Why does hydrogen gas put off the burning splinter and it burns with blue flame? 3) Why does carbon dioxide turn lime water milky?

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