Question

Identify the compound amongst the following of which 0.1 M aqueous solution has highest boiling point.

• A. Glucose
• B. Sodium chloride
• C. Calcium chloride
• D. Ferric chloride

Answer 1

The correct option is D Ferric chloride

0.1 M aqueous solution of ferric chloride has the highest boiling point.

The dissociation of one molecule of ferric chloride gives the maximum number of ions (four ions) in the solution.

$FeC{l}_3\to F{e}^{3+}+3C{l}^{-}$

Glucose is a non-electrolyte and it does not undergo dissociation.
The dissociation of one molecule of sodium chloride gives two ions.
The dissociation of one molecule of calcium chloride gives three ions.

Note: The solution which gives the highest number of ions on dissociation will have the highest boiling point.