Two soap bubbles of different radii are in communication with each other:

Moderate

A

air flows from the larger bubble into the smaller one until the two bubbles are of equal size
B

the size of the bubbles remains same
C

air flows from the smaller bubble into the larger one and the larger bubble grows at the expense of the smaller one
D

the air flows from the larger into the smaller bubble until the radius of the smaller one becomes equal to that of the large one and of the large one equal to that of the smaller one

Solution

air always flows from high pressure region to low pressure region . pressure inside the smaller bubble is high when it is in communication with the larger bubble hence radius of larger will be increased further.

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