Question 1 :
If $1 cal = 4.2 J$, then $0.2 cal g^{-1} {\;}^oC^{-1}=......... J kg^{-1} K^{-1}$
Question 2 :
Assertion: Air is a bad conductor of heat.
Reason: It's molecules are in Brownian motion.
Question 4 :
Assertion: Two thin blankets put together are warmer than a single blanket of double the thickness.
Reason: Thickness increases because of air layer enclosed between the two blankets.
Question 6 :
State whether given statement is True or FalseWoollen yard is a bad conductor of heat. 
Question 11 :
$500 g$ of hot water at ${ 60 }^{ \circ  }C$ is kept in the open till its temperature falls to ${ 40 }^{ \circ  }C$. Calculate the heat energy lost to the surroundings by the water. ( specific heat of water = 4200 J ${ { kg }^{ -1 } }^{ \circ  }{ C }^{ -1 }$)
Question 13 :
Assertion: Snow is better insulator than ice.
Reason: Snow contain air packet and air is good insulator of heat.
Question 14 :
The freezer in a refrigerator is fitted near the top :
Question 15 :
Which one of the following sources of energy you recommend to use?<br>A source of energy having an input energy .................... J and an output energy .................... J.<br>
Question 16 :
On a cold day when a room temperature is $15^oC$, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of$15^oC$, because
Question 18 :
Assertion: The range of clinical thermometer is between $35 ^\circ C$ and $42 ^\circ C$
Reason: The normal temperature of the human body is about $37 ^\circ C$ .Our body temperature cannot fall below $35 ^\circ C$ or rise above $42 ^\circ C$.
Question 21 :
Inside human body ,which of the following is responsible for heat transfer,
Question 22 :
Which of the following methods would reduce the temperature of hot tea
Question 24 :
If we keep pop corn in a pressure cooker on a flame, heat is transferred from flame to corn by :
Question 26 :
Which of the following is the range of temperature recorded by a laboratory thermometer ?
Question 27 :
Choose the wrong statement when we measure the temperature of a water kept in a beaker:
Question 31 :
.................. surface absorbs more heat than any other surface under identical conditions.
Question 34 :
State whether given statement is True or False<br/>The upper standard point of a thermometer is 273 K
Question 36 :
State whether given statement is True or FalseThe process of convection can takes place only in liquid and gases.
Question 38 :
What type of conductor should we used to make water pipes in cold countries?
Question 39 :
If object A and object B has no transfer of heat, then they both are in
Question 40 :
In experiment of convection heat transfer water inside the pipe, completely gets heated (with the application of heat source) can be explained best by which of the following statements,
Question 41 :
Which of the following mode of heat transfer involves movement of particles?
Question 42 :
In convection process rate of heat transfer is compared in the optionbetween gas and liquid,choose the correct statement
Question 44 :
Mercury boils at $367^oC$. Mercury thermometers are made such that they can measure temperature up to $500^o C$. This done by<br>
Question 45 :
Assertion: Two thin blankets put together are warmer than a single blanket of double the thickness.
Reason: Air gets trapped between two blanket which is a bad conductor of heat.
Question 47 :
Choose the correct answer from the alternatives given :<br>Formeasuring very high temperature, we use
Question 49 :
State whether given statement is True or FalseTo prevent heat conduction to our hands, handle of cooking vessels are made of bad conductors.
