Class 11 Chemistry Gases & Solutions States of Matter



Assertion :Droplets of liquid are usually more spherical in shape than large drops of the same liquid.
Reason :Force of surface tension predominates the force of gravity in case of small drops.
(a)
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
(b)
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
(c)
Assertion is correct but Reason is incorrect
(d)
Assertion is incorrect but Reason is correct
Correct answer: (a) 
Solution: The shape of the liquid is actually controlled by two forces viz. surface tension and gravitational force. When size of drop is small, 
surface tension force gravitational force,
which means net force is due to surface tension. In this case, is minimum when the surface area is minimum. So, the drop is spherical.

When the size of the drop is larger, 
gravitational force surface tension.
It means net force is due to gravitational force. In this case, gravitational is minimum when centre of gravity of the drop at the minimum. So, the drop is no more spherical.

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states of matter
gaseous state
state of matter (gaseous and liquid state)
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states of matter
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gaseous state