Physics – Class 11 Mock Test 8

10%

Question 1 of 10

1. In a closed pipe of radius R, fluid (having some viscosity) is flowing laminarly. Which point along a cross section will have maximum speed?

Centre

R/2 from centre

All points will have same speed

Near the wall of pipe

Question 1 of 10

Question 2 of 10

2. A closed container contains 0.6m³ of neon gas at 200K temperature and 1.3*10⁵Pa. Find the rise in temperature when 8360 J of heat is supplied to it. The molar heat capacity of neon at constant volume is 3.2calK^-1mol^-1. Assume the container doesn’t expand on heating.

13.9K

15.8K

13.3K

15K

Question 2 of 10

Question 3 of 10

3. Surface energy is ________________

the force per unit length acting on surface particles

the extra energy that the molecules at the surface have relative to molecules inside the liquid

the energy of the molecules inside the beaker

kinetic energy of the surface molecules

Question 3 of 10

Question 4 of 10

4. The value of coefficient of thermal expansion is always the same for a material. True or False?

True

False

Question 4 of 10

Question 5 of 10

5. Boyle’s and Charle’s law are obeyed by low density gases only. True or False?

False

True

Question 5 of 10

Question 6 of 10

6. An ice cube is kept on the surface of an aluminium block and another ice cube on the surface of a plastic block. Both blocks have the same temperature. Select the correct statement.

Ice will melt equally fast on both the blocks

Ice will not melt on the plastic block

Ice will melt faster on the aluminium block

Ice will melt faster on the plastic block

Question 6 of 10

Question 7 of 10

7. Why can any low density gas be used in a constant volume gas thermometer?

The given statement is not true

They are easy to handle

All low density gases show the same expansion behaviour

Their pressure variation is proportional to square of the change in temperature

Question 7 of 10

Question 8 of 10

8. What is the slope of line drawn for a graph between temperature in °C & °F?

slope is variable

1.8

5/9

Question 8 of 10

Question 9 of 10

9. Melting point depends on pressure. True or False?

False

True

Question 9 of 10

Question 10 of 10

10. What is the unit of coefficient of area expansion?

per °C

per (°C)²

(°C)²

°C

Question 10 of 10