Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) :

Water boils below 100°C by addition of NaCl.

Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) :
The rate constant of a first order reaction is proportional to the concentration of the reactant.

Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) :

Acetone gives a white precipitate on treatment with sodium chloride.

Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) :

Acetaldehyde undergoes Cannizzaro’s reaction on treatment with dilute alkali.

Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) :

The formation of chlorobenzene from benzene is a SN₂ reaction.