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Assertion: Conc. H(2)SO(4) cannot be use...

Assertion: Conc. `H_(2)SO_(4)` cannot be used to prepare pure HBr from NaBr.
Reason: It reacts is weaker than O-H bond.

A

(1) HBr oxidises `H_2SO_4`.

B

(2) HBr reduces `H_2SO_4`

C

(3) HBr undergoes disproportionation

D

(4) KBr reacts very slowly.

Text Solution

Verified by Experts

The correct Answer is:
B
The HBr so formed reduces `H_2SO_4` and itself gets oxidised to evolve `Br_2`.
`2HBr+H_2SO_4 to 2H_2O + SO_2 + Br_2`
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