Question

Consider the following.
Statement-I: Gold sol is prepared by Bredig’s arc method.
Statement-II: Bredig’s arc method involves only dispersion but not condensation.

• A. Both statement-I and statement-II are correct
• B. Both statement-I and statement-II are not correct
• C. Statement-I is correct, but statement-II is not correct
• D. Statement-I is not correct, but statement-II is correct

Hint:

Bredig’s arc method combines both dispersion and condensation to form metal sols like gold and silver.

Answer 1

The Correct Option is C

Statement-I is correct because gold sol is indeed prepared using Bredig’s arc method, where an electric arc is struck between metal electrodes immersed in cold water.
Statement-II is incorrect because Bredig’s arc method involves both dispersion and condensation processes. The metal is dispersed by arc and simultaneously condenses into colloidal particles.