Question

plzz help its too important​

Answer 1

Answer:

don't know about 1 and 2 but

3 one is hydrogen gas

Answer 2

Answer:

Nitric oxide: is a colourless gas but nitrogen dioxide is an acid, pungent smelling, brown gas.

Hydrogen Sulphide: is a colourless gas with a characteristic odour of rotten eggs which being denser than air may pool in low areas in still conditions.

Hydrogen:This test is most commonly used to identify hydrogen, which extinguishes with a distinctive 'squeaky pop' sound.

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