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Celsius temperature scale: The temperature scale which has a lower limit of 0° C and a higher limit of 100° C and is divided into 100 parts.

The correct option is C) A is correct but R is wrong.

Six’s maximum and minimum thermometer is one of the Meteorological Instruments used to measure maximum (highest) and minimum (lowest) temperatures of a place in a day.

212°F= 100°C. So 100 + 273 = 373 K.

25°C = (273 + 25) K = 298 K

1. Density of ice is less than that of water. 

2. This means water expands on freezing and converts into ice. 

3. So, excess space is required to expand the water. 

4. The bottle completely filled with water and closed with a tight cap has no excess space to expand water. 

5. So, bottle breaks while freezing water in it.

The correct option is D) R is correct but A is wrong.

Kelvin scale: A temperature scale that has a lower fixed point 273.15 K and an upper fixed point of 373.15 K is called the Kelvin scale.

a) 30° C = 30 + 273 = 303 K 

b) 70° C = 70 + 273 = 343 K

Internal energy : 

It is the energy possessed by the system by virtue of its molecular motion and molecular configuration. It is a stored energy. It depends on the temperature of the system.

A) both statements are correct

D) all the above

Resultant temperature T = \(\frac {V_1T_1+V_2T_2}{V_1+V_2}\)

1. g 

2. F 

3. e 

4. b

Combination of linear kinetic energy, rotational kinetic energy, vibrational energy, and potential energy of molecules is known as internal energy of the system.

Answer is 10800 cal

The heat energy required to change one unit mass of liquid to gas at constant temperature is called latent heat of vaporization

L = Q/m

The value of latent heat of vapourization of water is 540 cal/gm.

Latent heat of vaporization: The amount of heat required to convert one gram of liquid into vapor at a constant temperature.

Heat energy is used to change the state of water from liquid to vapor (gas). This is called the latent heat of vaporization.

Latent heat of vapourization (L) = Q/m

Units in C.G.S – cal/gm.

Units in S.l. – J/kg.

The latent heat of vaporization of water is 540 cal/gm.

When 1 g of water at a pressure of one atmosphere and at a temperature of 100 °C is converted into 1 g of steam, heat absorbed by the water is 540 cal.

i. (d) 4 °C

ii. (a) 4180 J

iii. (b) 540 cal

iv. (b) 4

The correct option is C) Radiation of heat.

1. Degree Celsius: Celsius is written as °C and read as degree Celsius. 

2. Degree Fahrenheit: Fahrenheit is written as °F and read as degree fahrenheit. 

3. Kelvin is written as K and read as Kelvin.

Yes, I have.

SI unit of heat is Joule. The unit calorie is also used

1. Sun 

2. Heat 

3. Electric current 

4. Heat 

5. Temperature 

6. Antarctic 

7. average

Heat energy flows from higher temperature to lower temperature.

1. Sun: It is the primary source of light and it gives us light and heat. 

2. Combustion: Heat energy can be generated by the burning of fuels like wood, Kerosene, Coal, Charcoal, Petrol etc.

3. Friction: We can generate heat by rubbing two surfaces of some substances. In the past people used to rub two stones together to light fire. 

4. Electricity: When Electric current flows through a conductor, heat energy is produced. Ex.: Iron box, Electric kettle.

1. – e 

2. – d 

3. – a 

4. – b 

5. – c.

Heat energy can be generated by the burning of fuels like wood, Kerosene, Coal, charcoal, gasoline/petrol, oil, etc

1. calorie

2. cubical expansion

3. Laboratory glassware.

Linear expansion:

1. The expansion is in length. 

2. Ex.: Expansion of railway track rod.

Cubical expansion: 

1. The expansion is in volume. 

2. Ex.: Expansion of metal ball.

The expansion of a substance on heating is called the thermal expansion of that substance.