Qualitative Analysis - Problem 1

Description:

Statement I − When silver nitrate is added to chlorobenzene, white precipitate is formed.

Statement II − C − Cl bond in chlorobenzene is ionisable.

A. Statements I and II are true and II is the correct reason for I.

B. Statement I is true but II is not the correct explanation to I.

C. Statement I is false but II is true.

D. Statements I and II are both false.

Solution −

The correct option is: (D)

Explanation −

• Both statements are false.

• When silver nitrate solution is added to chlorobenzene, “No White PPT” is formed.

• It is because, C − Cl bond in chlorobenzene is not ionisable due to the delocalization of lone pair of electrons of chlorine with the benzene ring giving the C − Cl bond a partial double bond character. Thus, it is very difficult to ionize this bond.