Question 1 :
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 3 :
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 4 :
Which of the following is a wrong pair of clothes worn during a particular season ?
Question 6 :
Which of the following is the range of temperature recorded by a laboratory thermometer ?
Question 8 :
Choose the correct answer from the alternatives given :<br>Formeasuring very high temperature, we use
Question 10 :
Assertion: Air is a bad conductor of heat.
Reason: It's molecules are in Brownian motion.
Question 11 :
A heating coil is dippedin a bucket filled withwater. Explain the significant mechanisms inheat flow.
Question 12 :
State whether given statement is True or FalseVentilation is an example of convection current in gases. 
Question 13 :
State whether given statement is True or False :<br/><br/>Mud houses are hot in summer and cold in winter.
Question 14 :
Which of the following physical quantities is measured in calories ? <br/>
Question 18 :
Inside human body ,which of the following is responsible for heat transfer,
Question 20 :
Which of the following is not true about Laboratory thermometers ?
Question 24 :
Write 'true' or 'false' for each statement: On touching a lump of ice, we feel cold because some heat passes from our body to the ice. <br>
Question 25 :
A container is partially filled with hot water, sealed and left to cool. Which statements are correct?<br>$1$. As the temperature decreases, water molecules lose kinetic energy.<br>$2$. As the temperature decreases, more water molecules move from vapour to liquid.<br>$3$. As the temperature decreases, the vapour pressure of the water decreases.<br>
Question 29 :
__________thermometers include two different metals that are bonded together and expand at different rates as they warm up.
Question 31 :
Seema is planning a trip to Kashmir this summer. Which of the following clothes should she definitely pack?
Question 32 :
If we keep pop corn in a pressure cooker on a flame, heat is transferred from flame to corn by :
Question 36 :
Suppose in a clinical thermometer, the difference between first and second bigger marks is $1^o$ and there are 5 small divisions between them theneach small division refers to the difference in scale of:
Question 40 :
Assertion: Air is a bad conductor of heat.
Reason: It's molecules are in continuous contact with each other.
Question 42 :
State whether given statement is True or False<br/>The upper standard point of a thermometer is 273 K
Question 43 :
Two layers of cloth of equal thickness provide warmer covering than a single layer of cloth of double the thickness, because they :
Question 49 :
.................. surface absorbs more heat than any other surface under identical conditions.
Question 50 :
The freezer in a refrigerator is fitted near the top :
Question 51 :
Assertion: A brass tumbler feels much colder than a wooden tray on a chilly day.
Reason: The thermal conductivity of brass is more than the thermal conductivity of wood.
Question 53 :
In the Ingen Hausz's experiment, the wax melts up to lengths $10cm$ and $25cm$ on two identical rods of different materials. The ratio of thermal conductivities of the two materials is
Question 55 :
The boiling point of mercury is 367$^o$C. A mercury thermometer can be used to measure a temperature of 500$^o$C;
Question 57 :
State whether given statement is True or False<br/>A wooden chair feels colder than an iron chair in winter
Question 58 :
The amount of heat required to raise the temperature of 1 kilogram of water by $1\:^oC$ is called :<br/>
Question 59 :
Electric heaters used for cookinghave the filament or the heating coilon a plate made up of clay because:
Question 60 :
If a thermometer reads freezing point of water as $20^{\circ}C$ and boiling point at $150^{\circ}C$ how much thermometer read when the actual temperature is $60^{\circ}C$.
Question 61 :
a corked bottle full of water when frozen will break because.
