A soap of sodium stearate in solution starts micellisation at

CHEMISTRY · Single correct · CBSE · Chemistry · Is Matter Around Us Pure? · Is Matter Around Us Pure?

Problem

1.2 \times 10^{-3} M

. A colloidal (micelle) particle, on an average contains

2.4 \times 10^{13}

molecules of soap in

1 \text{ mm}^3

. The average number of anions (stearate ions) is : (1) 120 (2) 90 (3) 60 (4) 30