Heat Test - 6...

Directions: Read the given information carefully and answer the question that follows.

Three containers contain different quantities of water.
Container A contains 5 kg of water at 45°C.
Container B contains 3 kg of water at 45°C.
Container C contains 10 kg of water at 45°C.

If we place all three containers in contact with each other, then which of the following is correct?

If we mix 10 kg of water at 70°C with 10 kg of water at 20°C, then the temperature of the mixture will be

What is the value of zero degree Kelvin on a Celsius scale?

Which of the following thermometers can be used to measure the temperature of boiling water?

Every temperature measuring instrument makes use of a physical property of a substance in order to measure temperature objectively. Which of the following physical properties is used by a mercury-in-glass thermometer?

Directions: Read the given information carefully and choose the correct answer.

Rahul takes two thermometers, A and B. He wraps a black cloth on the bulb of thermometer A and a white cloth on that of thermometer B. He keeps the two thermometers in the Sun for an hour.

Statement A: The reading on the thermometer A is more than that on the thermometer B.
Statement B: The black surface absorbs more heat than the white surface.

A bimetallic strip is made of two metals joined to one another, where one metal expands more on heating than the other. Consider a bimetallic strip made of aluminium and steel (aluminium expands more on heating than steel). On heating, the strip will

Which of the following is/are the result(s) of transfer of heat by radiation?

(i) If we sit near a fire, we feel warm.
(ii) It is cooler in the shade, while it is hot in the Sun.
(iii) In a toaster, slices of bread get heated from the heat of the coil.

Which of the following statements is incorrect?

Which of the following statements is true?

If half of a slab of ice is covered with a white cloth and the other half is covered with a black cloth, then which of the following will be observed?

Which of the following statements is false?

Which of the statements given below are true?

(i) In non-metals, the process of heat transfer by means of conduction is slow.
(ii) In winters, we wear woollen clothes as they cause conduction of heat from the body to the surroundings.
(iii) Cooking utensils are made of metals, so that heat can easily be conducted through their base.
(iv) The liquid used in a thermometer must be a bad conductor of heat.

Metals are good conductors of heat because

A thermos flask is designed to prevent the contents of the flask from losing heat. Which of the following statements concerning the design of thermos flasks is incorrect?

Land and Sea breezes occur along coastal areas or areas with adjacent large water bodies. Water and land have different heating abilities. Water takes a bit more time to warm up and is able to retain the heat longer than land does. These breezes take place due to

Which of the following options correctly classifies the objects listed below as conductors and insulators?

(i) Aluminium wire
(ii) Steel spoon
(iii) Wooden handle
(iv) Silver coin
(v) Plastic bottle
(vi) Blade of knife

Which of the following statements is/are false?

a. Conduction starts once the two objects or the parts of the same object have attained the same temperature.
b. Cooling coils of air conditioners are made of copper as they readily conduct away heat.
c. Heat energy does flows through bad conductors, but at a very small rate as compared to good conductors.

Match the following:

The door of a running refrigerator inside a closed room was left open. Which of the following observations will be seen?