Question

Which of the following combination will produce gas?

A

metal and in the presence of air

B

metal and

C

metal and

D

metal and

Hard
JEE Advanced

Solution

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Correct option is
D

metal and

Zn metal and NaOH(aq) will produce hydrogen gas.


Gold react with sodium cyanide, oxygen and water, but no hydrogen gas is obtained.


Cu metal reacts with conc. nitric acid but no hydrgen gas is obtained.


Cu metal reacts with conc. nitric acid but no hydrgen gas is obtained.

Hence, the correct option is D.

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