1. A soap bubble assumes a spherical surface. Which of the following statement is wrong

(a)  The soap film consists of two surface layers of molecules back to back

(b)  The bubble encloses air inside it

(c)   The pressure of air inside the bubble is less than the atmospheric pressure; that is why the atmospheric pressure has compressed it equally from all sides to give           it a spherical shape

(d)  Because of the elastic property of the film, it will tend to shrink to as small a surface area as possible for the volume it has enclosed

Ans. c

(51)