Question

Which of the following pair of liquids has dipole-induced dipole interaction?

• A. Water and ammonia
• B. Water and chloroform
• C. Water and benzene
• D. Water and ethyl alcohol

Hint:

Polar + Non-polar molecules generally show: \[ \text{Dipole-induced dipole interaction} \]

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
As established in previous questions, dipole-induced dipole interactions occur strictly between a **polar** molecule (having a permanent dipole) and a **non-polar** molecule.
Step 2: Detailed Explanation:
Let's analyze the pairs provided:
(A) Water and Ammonia: Both are polar. They interact via dipole-dipole forces and strong hydrogen bonding.
(B) Water and Chloroform (\(CHCl_3\)): Both are polar. They interact via dipole-dipole forces.
(C) Water and Benzene: Water is highly polar. Benzene is a symmetrical hydrocarbon and is non-polar. The dipole of water induces a dipole in the benzene ring. This fits the definition.
(D) Water and Ethyl alcohol: Both are polar and both possess hydroxyl (\(-OH\)) groups capable of forming hydrogen bonds.
Step 3: Final Answer:
Water and benzene is the correct pair.