Heat part - 2 (POLYCET 2022)
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మీకు ఏవైనా కీ లోపాలు దొరికితే లోపాలు మాకు తెలియజేయడానికి వెనుకాడవద్దు.
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- Review
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Question 1 of 22
1. Question
1. Water expands on
a. Melting
b. Freezing
c. Condensation
d. None -
Question 2 of 22
2. Question
2. C.G.S unit of specific heat is
a. cal/g-degreesc
b. cal/g-degreesj
c. newton/g -degreesc
d. None -
Question 3 of 22
3. Question
3. The process in which liquid phase changes to gaseous phase at a constant temperature at a given pressure is
a. Melting
b. Boiling
c. Humidity
d. Evaporation -
Question 4 of 22
4. Question
4. The average kinetic energy of the molecules is ____ to the absolute temperature.
a. Directly proportional
b. Inversely proportional
c. Equal
d. None of these -
Question 5 of 22
5. Question
5. Convert 0degrees Celsius in kelvin
a. 272
b. 270
c. 274
d. 273 -
Question 6 of 22
6. Question
6. Melting is a process in which solid phase changes to
a. Liquid phase
b. Liquid phase at constant temperature
c. Gaseous phase
d. Any phase -
Question 7 of 22
7. Question
7. What is the specific heat of sea water in J/kg-k
a. 7900
b. 3800
c. 3700
d. 3900 -
Question 8 of 22
8. Question
8. Why does water on floor disappear after some time
a. Due to evaporation of molecules
b. Due to condensation of molecules
c. Due to melting of molecules
d. None -
Question 9 of 22
9. Question
9. Melting point of ice is
a. 0degreesC
b. 100degreesC
c. 373degreesC
d. Below 0degreesC -
Question 10 of 22
10. Question
10. For same change in temperature the amount of heat(Q) absorbed by a substance is _____ to its mass.
a. Equal
b. Directly proportional
c. Inversely proportional
d. Not proportional -
Question 11 of 22
11. Question
11. Freezing of water takes place at___0C temperature.
a. 0degreesC
b. 100degreesC
c. 110degreesC
d. -5degreesC -
Question 12 of 22
12. Question
12. The amount of water vapour present in air is called
a. Moisture
b. Humidity
c. Temperature
d. None -
Question 13 of 22
13. Question
13. Rate of evaporation of liquid depends upon
a. Surface area
b. Temperature
c. Water vapour in surrounding air
d. All -
Question 14 of 22
14. Question
14. Which metal does possess the specific heat of 0.092 cal/g-0 ?
a. Zinc
b. Brass
c. Copper
d. Iron -
Question 15 of 22
15. Question
15. Which of the following is a form of energy ?
a. Temperature
b. Heat
c. Thermal equilibrium
d. All -
Question 16 of 22
16. Question
16. S.I units of temperature is
a. Celsius
b. Degrees
c. Kelvin
d. Ohm -
Question 17 of 22
17. Question
17. Amount of water vapour present in air is called
a. Humidity of solid
b. Humidity of water
c. Humidity of air
d. Humidity of soil -
Question 18 of 22
18. Question
18. Three bodies X, Y, Z are in thermal equilibrium . The temperature of Y is 450C . Then the temperature of Z is….
a. 45degreesC
b. 50degreesC
c. 40degreesC
d. Any temperature -
Question 19 of 22
19. Question
19. Latent heat of vapourization of water is
a. 540 cal/g
b. 530 cal/g
c. 520 cal/g
d. 510 cal/g -
Question 20 of 22
20. Question
20. Latent heat of vapourization units in S.I are
a. cal/g
b. J/kg
c. j/cal
d. None -
Question 21 of 22
21. Question
21. Rate of evaporation of liquid depends on
a. Surface area temperature
b. Amount of vapour already present in the surrounding air
c. Surface area temperature & Amount of vapour already present in the surrounding air
d. None -
Question 22 of 22
22. Question
22. Formation of dew is an example for
a. Boiling
b. Melting
c. Condensation
d. Evaporation