Thermal Properties of Matter-Quiz-6

 

THERMAL PROPERTIES OF MATTER QUIZ-6

Dear Readers,

JEE Advanced Physics Syllabus can be referred by the IIT aspirants to get a detailed list of all topics that are important in cracking the entrance examination. JEE Advanced syllabus for Physics has been designed in such a way that it offers very practical and application-based learning to further make it easier for students to understand every concept or topic by correlating it with day-to-day experiences. In comparison to the other two subjects, the syllabus of JEE Advanced for physics is developed in such a way so as to test the deep understanding and application of concepts.

Q51. Work done in converting 1 g of ice at -10°C into steam at 100°C is

•  3045 J
•  6056 J
•  721 J
•  6 J

Solution

52. Hot water cools from 60°C to 50°C in the first 10 min and to 42°C in the next 10 min. The temperature of the surrounding is

•  5°C
•  10°C
•  15°C
•  20°C

Solution

Q53. In similar calorimeters, equal volumes of water and alcohol, when poured, take 100 and 74 s, respectively, to cool from 50°C to 40°C. If the thermal capacity of each calorimeter is numerically equal to volume of either liquid, then calculate the specific heat capacity of alcohol (given: the relative density of alcohol as 0.8 and specific heat capacity of water as 1 cal/g/°C)

•   0.8 cal/g°C
•  0.6 cal/g°C
•  0.9 cal/g°C
•  1 cal/g°C

Solution

Q54. Solar constant is 1370 W/m^2. 70% of the light incident on the earth is absorbed by the earth and the earth’s average temperature is 288 K. The effective emissivity of the earth is

•  0.2
•  0.4
•  0.6
•  1

Solution

Q55. A flask of volume 10^3cc is completely filled with mercury at 0°C. The coefficient of cubical expansion of mercury is 180×10^(-6)/°C and heat of glass is 40×10^(-6)/℃. If the flask is now placed in boiling water at 100°C, how much mercury will overflow?

•  7 cc
•  14 cc
•  21 cc
•  28 cc

Solution
 

Q56. A container or capacity 700 mL is filled with two immiscible liquids of volume 200 mL and 500 mL with respective volume expansivities as 1.4×10^(-5)/°C and 2.1×10^(-5)/°C. During the heating of the vessel, it is observed that neither any liquid overflows nor any empty space is created. The volume expansivity of the container is

•  1.9×10^(-5)/°C
•  1.9×10^(-6)/°C
• 1.6×10^(-5)/°C
•  1.6×10^(-6)/°

Solution

Q57. A steel ball of mass 0.1 kg falls freely from a height of 10 m and bounces to a height of 5.4 m from the ground. If the dissipated energy in this process is absorbed by the ball, the rise in its temperature is (specific heat of steel=460 K/kg/°C, g = 10 m/s²)

•  0.01°C
•  0.1°C
•  1°C
•  1.1°C

Solution

Q58. Two hollow spheres of different materials, one with double the radius and one-fourth wall thickness of the other, are filled with ice. If the times taken for complete melting of ice in the larger to the smaller one are in the ratio of 25:16, then their corresponding thermal conductivities are in the ratio

•  4:5
•  5:4
•  8:25
•  25:8

Solution

Q59. A sphere, a cube and a thin circular plate are made of same substance and all have same mass. These are heated to 200°C and then placed in a room. Then the

•  Temperature of sphere drops to room temperature at last
•  Temperature of cube drops to room temperature at last
•  Temperature of thin circular plate drop to room temperature at last
•  Temperature of all the three drop to room temperature at the same time

Solution

Q60. An earthen pitcher loses 1 g of water per minute due to evaporation. If the water equivalent of pitcher is 0.5 kg and the pitcher contains 9.5 kg of water, calculate the time required for the water in the pitcher to cool to 28°C from its original temperature of 30°C. Neglect radiation effects. Latent heat of vapourization of water in this range of temperature is 580 cal/g and specific heat of water is 1 k cal/g C°

•  38.6 min
•  30.5 min
•  34.5 min
• 41.2 min

Solution