7. A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, then the work done in this process will be
(a) 2 πR2T
(b) 3 πR2T
(c) 4 πR2T
(d) 2 πR2T
Ans. c
(32)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (126)