All of the following are weak
acidsexcept
a. hcno.
b. hbr.
c. hf.
d. hno2.
e. hcn.

HBr.

Explanation:

Acids may be defined as the substance that has the ability to release hydrogen ions in the solution. Two types of acids are strong acids and weak acids.

Weak acids do not completely dissociate into ions whereas strong acids has the ability to completely dissociate into ions. Among the acids given in the solution, hydrogen bromide has the ability to completely dissociate into hydrogen and bromide ions. Hence, HBr acts as a strong acid.

Thus, the correct answer is option (B).

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explanation:

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