Question

I. Answer all the questions 20  ½ =10M
1. Equal amount of spirit is taken in a pan, cup, saucer and a watch glass. In which of
them, the evaporation takes place slowly.
2. The S.I. unit of specific heat is ...............
3. The formula for Specific heat S =
4 When ice melts, its temperature........
A) remains constant B) increase C) decreases D) Cannot say
5. Which of the following are not true
1. When two bodies are in thermal equilibrium heat energy will be transferred from
the colder body to hotter body.
2. The state of thermal equilibrium denotes a state of a body where it neither receives
nor gives out heat energy.
3. The furniture in the room is in thermal equilibrium with air in the room
6. Which of the following are true in the case of Specific Heat
1) Specific heat depends on nature of the substance.
2) Specific heat depends on mass of the substance.
3) if specific heat is high the rate of rise in temperature is low.
4) if specific heat is less the rate of rise in temperature is low.
7. What are the observation made by you in the process of Boiling of water
A) The temperature of the water rises continuously till it reaches 1000C
B) The solubility of gases decreases during boiling
C) Boiling is a process in which the liquid phase to gaseous phase at a constant
temperature
D) Above all
8. P : The average kinetic energy of the molecules is directly proportional to the absolute
temperature
Q : Rate of rise in temperature doesn’t depends on nature of the substance
A)P: True , Q: False B) P: False , Q: True
C) P: True , Q: True D) P: False, Q: False
9. Which of the following are true
1. Heat is form of energy that flows from a body at higher temperature to a body at
lower temperature
2. Temperature determines direction of Heat
3. Heat & Temperature are cause and effect
4. Temperature is a quantity that denotes which body is hotter and which is colder
5. all the above
10. Define Evaporation?

Answer 1

Answer:

kaliakair karodpati occupational psp Palakkad Jayaprakash Jayaraj

Answer 2

Answer:

Air cools when the flame goes out. The molecules slow down and air pressure decreases. Water vapor condenses to moisture on the glass, causing lower air pressure. ... To reach equilibrium, the area must decrease, so the water rises into the glass.