Ncert Exercises & Solutions

With an increase in temperature, the viscosity of:
(a) gases decreases.
(b) liquids increases.
(c) gases increases.
(d) liquids decreases.
Which of the following options is/are correct?

1.	(b, c)	2.	(a, d)
3.	(c, d)	4.	(a, b)

(3) Hint: The viscosity of a liquid depends on the intermolecular forces and the viscosity of the gases depends on the movement of the molecules.

Step 1: Find the variation of viscosity of the liquids with temperature.
For liquids, the coefficient of viscosity,

η_{l i q u i d} \propto \frac{1}{\sqrt{T}}

i.e. with an increase in temperature,

η_{l i q u i d}

decreases.

Step 2: Find the variation of viscosity of the gases with temperature.
For gases, the coefficient of viscosity,

η_{g a s e s} \propto \sqrt{T}

i.e. with an increase in temperature,

η_{g a s e s}

increases.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions