Chemistry
Hydrogen is evolved by the action of cold dil. HNO3 on
- Fe
- Cu
- Mg
- Zn
Hydrogen
27 Likes
Answer
Mg
Reason — Magnesium (Mg) and manganese (Mn) are the only metals that react with very dil. nitric acid to liberate hydrogen. The oxidizing action of the acid is much reduced due to its over dilution.
Mg + 2HNO3 ⟶ Mg(NO3)2 + H2 ↑
Answered By
20 Likes
Related Questions
Which metal produces hydrogen gas on reaction with cold water?
- Al
- Fe
- Pd
- Na
The composition of the nucleus of deuterium is:
- 1e– and 1P
- 1P and 1n
- 1n and 1e
- 2P and 1e–
A small piece of calcium metal is put into a small trough containing water. There is effervescence and white turbidity is formed.
(a) Name the gas formed in the reaction. How would you test the gas?
(b) Write an equation for the reaction.
(c) What do you observe when a few drops of red litmus solution are added to the turbid solution?
Thin strips of magnesium, copper and iron are taken.
(a) Write down what happens when these metals are treated as follows
(i) Heated in presence of air
(ii) Heated with dil. HCl
(iii) Added to an aqueous solution of zinc sulphate
(b) Arrange these metals in descending order of reactivity.