Statement I: While blowing a soap bubble. to increase the size of soap bubble, we have to increase the air pressure within the soap bubble.
Statement II: To increase the size of soap bubble more air has to be pushed into the bubble.

Options

A. Statement I is true, statement II is true and Statement II is a correct explanation for Statement I.
B. Statement I is true, Statement II is true and Statement II is NOT the correct explanation for Statement I.
C. Statement I is true, Statement II is false.
D. Statement I is false, Statement II is true.

Answer

D

Explanation

Excess pressure inside a soap bubble is given by `p_(i)-p_(0)=4S//r` as `p_(i)=p_(0)prop1/r`, so as `r` increase `p_(1)` decreases (`p_(0)` constant) therefore Statement I is wrong.
Statement II is correct as more air has to be forced in .to cause the bubble to grow but contrary to the process of blowing up a rubber balloon, the excess pressure required to force air into the bubble decrease with the bubble size.