Question

If two soap bubbles of different radii are connected by a tube,
(a) air flows from bigger bubble to the smaller bubble till the sizes become equal
(b) air flows from bigger bubble to the smaller bubble till the sizes are interchanged
(c) air flows from the smaller bubble to the bigger
(d) there lis no flow of air.

Answer 1

(c) air flows from smaller bubble to the bigger 

Explanation: 

Since the bigger soap bubbles have lesser inside pressure in comparison to smaller bubbles, when connected by a tube the air will flow from smaller bubble to bigger.