Question

if we bring a matchstick near the mouth of the test tube in which a reaction between zinc metal and dilute HCl is taking place we observed that a. the matchstick burns faster b. a gas evolves which burns with a Pop sound c. the matchstick extinguishes d. a gas evolves which turns limewater milky

Answer 1

it burns with a pop sound



it is blue in color

it is hydrogen gas

Answer 2

it gives the pop sound
it changes blue in colour
it gives hydrogen gas