Question

A piece of zinc metal is dropped in dilute solution of hydrochloric acid:
a) Which gas is liberated when metal reacts with acid.
b) How will you test the presence on this gas.
c) Is it lighter or heavier than air.?​

Answer 1

a) Hydrogen gas

b) You can test for hydrogen gas by putting a burning splinter near the gas. The splinter will gives out a 'pop' sound

c) It is lighter than air

Answer 2

Answer:

1. hydrogen gas will evolved..
2. when we bring a matchstick towards it ,it burns with pop sound...
3. yes ,it is lighter than air.(not sure).