Question

Question #451b6

Answer 1

Look at explanation

Explanation:

1) Hydrogen gas, `H_2`(g) has no smell or colour.

2) Hydrogen gas has no effect on moist litmus paper
or moist universal indicator paper - it is neutral.

3)Test for Hydrogen Gas:

Hydrogen gas is recognised by the 'pop' when it burns.
The 'pop' is the sound of a small explosion.
Hydrogen gas is highly flammable.

`2H_2(g) + O_2(g) rarr 2H_2O(l)`

This highly exothermic reaction is an example of oxidation.