## Latent Heat - MCQ - Advance Level

Physics is an important subject in preparation for various Competitive exams. To keep a track of your preparation we have designed a small quiz of Advance Level Questions on Latent Heat. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. An object of mass 3.5 kg is situated at a height of 2 km from the earth’s surface at a temperature of –15°C. it is dropped from rest. It falls in a tube containing ice at 0°C and immediately comes to rest. During the journey its temperature becomes 0°C due to friction with air as it reaches the surface of the earth. If g is 10 m/s2 and latent heat of ice is 3.5 x 105 J/kg, the object will melt

•  400 gm of ice
•  300 gm of ice
•  200 gm of ice
•  100 gm of ice

Q2. An immersion heater takes time t1 to raise the temperature of a mass M of a liquid from a temperature T1 to its normal boiling point T2. In a further time t2 , a mass m of the liquid is vaporized. If the specific heat capacity of the liquid is c and heat losses to the atmosphere and to the containing vessel are ignored, the specific latent heat of vaporisation is

•  Mc(T1 - T2)t2/ mt1
•  mc(T2 - T1)t2/ mT1
•  McT1T2t2/ mt1
•  mt1/ Mc(T1 - T2)t2

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