What is ratio of surface energy of 1 small drop and 1 large drop, if 1000 small drops combined to form 1 large drop
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a
100 : 1
b
1000 : 1
c
10 : 1
d
1 : 100
answer is D.
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Detailed Solution
Volume of liquid remain same i.e. volume of 1000 small drops will be equal to volume of one big dropn43πr3=43πR3⇒1000r3=R3⇒R=10r∴rR=110 surface energy of one small drop surface energy of one big drop =4πr2T4πR2T=1100