Question

When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved which is utilised in the hydrogenation of lil. Name the gas evolved . Wirte the chemical equation of the reaction involved and also worte a test to detech the gas formed.

Answer 1

When zinc reacts with diulte solution of strong acid (like hydrochloric acid HCI), it forms salt and hydrogen gas is evolved which is used in hydrogenation of oil
`Zn+2HCIrarrZnCI_(2)+H_(2)uparrow`
To test the pressence of `H_(2)` gas when a burning spinter is brought near the mouth of the test tube , the gas burns with a pop sound.