JEE 2020 Revision :Thermal Properties of Matter Quiz for JEE & BITSAT Exams

Question 1

An aluminium container of mass 100 gm contains 200 gm of ice at -20°C . Heat is added to the system at the rate of 100 cal/s. The temperature of the system after 4 minutes will be (specific heat of ice = 0.5 and L = 80 cal/ gm, specific heat of Al = 0.2 cal/gm/°C)

Question 2

Two vertical glass tubes filled with a liquid are connected by a capillary tube as shown in the figure. The tube on the left is put in an ice bath at 0^oC while the tube on the right is kept at 30 °C in a water bath. The difference in the levels of the liquid in the two tubes is 4 cm while the height of the liquid column at 0 °C is 120 cm. The coefficient of volume expansion of liquid is (Ignore expansion of glass tube)

Question 3

A difference of temperature of 25 °C is equivalent to a difference of :

Question 4

Four rods A, B, C, D of same length and material but of different radii r,

and 2r respectively are held between two rigid walls. The temperature of all rods is increased by same amount. If the rods do not bend, then

Question 5

Air inside a closed container is saturated with water vapour. The air pressure is p and the saturated vapour pressure of water is $Description: E:\WBJEE\2011\2011_Physics_files\image158.png$ . If the mixture is compressed to one half of its volume by maintaining temperature constant, the pressure becomes

Question 6

Utensils used for efficient cooking should have-

Question 7

A metallic rod of cross-sectional area 9.0 cm² and length 0.54 m, with the surface insulated to prevent heat loss, has one end immersed in boiling water and the other in ice-water mixture. The heat conducted through the rod melts the ice at the rate of 1 gm for every 33 sec. The thermal conductivity of the rod is (Take L_f of ice = 3.34 x 10⁵ J/kg)

Question 8

A hollow sphere of inner radius R and outer radius 2R is made of a material of thermal conductivity K. It is surrounded by another hollow sphere of inner radius 2R and outer radius 3R made of same material of thermal conductivity K. The inside of smaller sphere is maintained at 0°C and the outside of bigger sphere at 100°C . The system is in steady state. The temperature of the interface will be :