Question

Which of the following will not produce hydrogen gas?

A

Reaction between and dil.

B

Reaction between and conc.

C

Reaction between and

D

Electrolysis of in Nelson's cell

Hard

Solution

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Correct option is B)

Iron reacts with dil. to produce ferrous chloride and hydrogen.
Zinc reacts with dil sulphuric acid to produce zinc sulphate and hydrogen (lab method).
dil. .Β 
However conc. sulphuric acid cannot be used because and is evolved.Β 
Zinc reacts with to form sodium zincate and hydrogen.

During the electrolysis of aqueous in Nelson's cell, hydrogen gas is obtained. Water dissociates to small extent, .
Hydrogen ions are reduced to hydrogen.
.

Solve any question of Hydrogen with:-

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