Question

what happens if a burning splinter is brought near the mouth of the test tube containing the the zinc and hydrochloric acid in the tube​

Answer 1

Explanation:

the splinter extinguishes and gas burns with a blue flame and pop sound.

it shows that hydrogen gas is evolved.

Zn + H2SO4----------- ZnSO4 + H2

Answer 2

Explanation:

Hydrochloric acid reacts with metals to release hydrogen gas. > Test for H2 gas: When a burning splinter is brought near the mouth of test tube releasing H2 gas, it bums with a 'pop sound'. > Hydrochloric acid react with sodium carbonate to release CO2 gas.