Question

An unknown organic liquid does not turn blue litmus red and gives no effervescence with sodium hydrogen carbonate. However, when a dry piece of sodium pellet is added to the liquid, a gas is evolved with brisk effervescence. Identify the liquid.

Answer 1

The given liquid is probably an alcohol (e.g. , ethyl alcohol) which has no reaction with blue litmus or sodium hydrogen carbonate. But it evolves hydrogen gas on reacting with sodium metal
`underset("Ethanol")(2C_(2)H_(5)OH)+2Nararrunderset("Sod. ethaoxide")(2C_(2)H_(5)ONa)+underset("(effervesecnce)")(H_(2))`