In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below. Assertion (A): van't Hoff factor for a solution of benzoic acid in benzene is less than one. Reason(R): Benzoic acid undergoes dissociation in benzene and its calculated molecular mass using colligative properties is lower than its actual molecular mass.

Step-by-step solution

Benzoic acid ( C₆H₅COOH ) undergoes dimerization in non-polar solvents like benzene due to intermolecular hydrogen bonding. This association leads to a decrease in the number of particles in the solution. The van't Hoff factor i is defined as the ratio of observed colligative property to calculated colligative property. For association, i The Reason (R) states that benzoic acid undergoes dissociation in benzene, which is incorrect. It undergoes association. Furthermore, for association, the observed colligative pro