Properties Of Solids And Liquids Question 269

Question: A sample of metal weighs 210 gm in air, 180 gm in water and 120 gm in liquid. Then relative density (RD) of

Options:

A)Metal is 3

B)Metal is 7

C)Liquid is 3

D)Liquid is $ \frac{1}{3} $

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Answer:

Correct Answer: C

Solution:

Density of metal = $ \rho $ ,

Density of liquid = s If V is the volume of sample then according to problem $ 210=V\rho g $ -(i)

$ 180=V(\rho -1)g $ -(ii)

$ 120=V(\rho -\sigma )g $ -(iii)

By solving (i), (ii) and (iii) we get $ \rho =7 $ and $ \sigma =3 $ .



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