Consider following statements:
A. Surface tension arises due to extra energy of the molecules at the interior as compared to the molecules at the surface, of a liquid.
B. As the temperature of liquid rises, the coefficient of viscosity increases.
C. As the temperature of gas increases, the coefficient of viscosity increases
D. The onset of turbulence is determined by Reynold's number.
E. In a steady flow two stream lines never intersect.

Choose the correct answer from the options given below:

[JEE Main 2025, 28 Jan (Shift 1)]

Question

Consider following statements:
A. Surface tension arises due to extra energy of the molecules at the interior as compared to the molecules at the surface, of a liquid.
B. As the temperature of liquid rises, the coefficient of viscosity increases.
C. As the temperature of gas increases, the coefficient of viscosity increases
D. The onset of turbulence is determined by Reynold's number.
E. In a steady flow two stream lines never intersect.

Choose the correct answer from the options given below:

[JEE Main 2025, 28 Jan (Shift 1)]

YESPYQ · Accepted Answer

Correct answer: b) C, D, E only. Surface tension is property of surface molecules not interior molecules. In case of liquid as temperature increases surface tension decreases. In case of gases due to increase in temperature collision will be more frequent hence viscosity increases.

Consider following statements: A. Surface tension arises due to extra energy of the molecules at the interior as compare…

Practice more JEE Physics PYQs