Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
An air bubble in a water tank rises from the bottom to the top. Which of the following statements are true? (1) Bubble rises upwards because pressure at the bottom in less than that at the top (2) Bubble rises upwords because pressure at the bottom is greater than that at the top (3) As the bubble rises its size decreases (4) As the bubble rises its size increasesA) 1, 2 and 3 are correct.
B) 1 and 2 are correct.
C) 2 and 4 are correct.
D) 1 and 3 are correct.
Correct Answer: C
Solution :
\[{{P}_{botuom}}>{{P}_{surface}},\]bubble rises upwards. At constant temperature\[V\propto \frac{1}{p}\](Boyle's law) Since, as the bubble rises upward, pressure decreases, then from above law volume of bubble will increases ie, its size increases.
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