## Latent Heat - MCQ - Basic 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 Basic 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. A metallic ball and highly stretched spring are made of the same material and have the same mass. They are heated so that they melt, the latent heat required

•  Are the same for both
•  Is greater for the ball
•  Is greater for the spring
•  For the two may or may not be the same depending upon the metal

Q2. A mass of liquid with volume V1 is completely changed into a gas of volume V2 at a constant external pressure P and temperature T. If the latent heat of evaporation for the given mass is L, then the increase in the internal energy of the system is

•  Zero
•  P(V2 - V1)
•  L - P(V2 - V1)
•  L

Q3. During the melting of a slab of ice at 273 K at atmospheric pressure

•  Positive work is done by ice-water system on the atmosphere
•  Positive work is done on ice-water system on the atmosphere
•  The internal energy of the ice-water system increases
•  The internal energy of the ice-water system decreases

Q4. 1gm steam at 100° can melt how much ice at 0°C

•  80/540 gm
•  540/80 gm
•  8 gm
•  8 kg

Q5. The melting of solids under atmospheric pressure is

•  An isometric change
•  An isobaric change
•  Both isobaric and isothermal change

Q6. 3.2 kg of ice at -10°C just melts with a mass m of steam

•  m = 400 gm
•  m = 800 gm
•  m = 500 gm
•  m = 900 gm

Q7. A 10 kg iron bar (specific heat 0.11 cal/gm-°C) at 80°C is placed on a block of ice. How much ice melts

•  1.1 kg
•  10 kg
•  16 kg
•  60 kg

Q8. Water at 0°C was boiled away over a burner supplying heat at a constant rate. If the time to raise the temperature from 0°C to 100°C is 5min and the time to boil away at 100°C is 28min, then the specific heat of steam in J g-1 is (take s = 1.0 cal g-1 K -1)

•  540
•  2250
•  2352
•  2392

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