Properties Of Solids And Liquids Question 350

Question: One thousand small water drops of equal radii combine to form a big drop. The ratio of final surface energy to the total initial surface energy is [MP PET 1997; KCET 1999]

Options:

A) 1000 : 1

B)1 : 1000

C) 10 : 1

D) 1 : 10

Show Answer

Answer:

Correct Answer: D

Solution:

As volume remain constant therefore R=n1/3r

surface energy of one big dropsurface energy of n drop=4πR2Tn×4πr2T

R2nr2=n2/3r2nr2 = 1n1/3=1(1000)1/3=110



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक