The heat is transferred directly from its source to another place without help of any substance in between, without a medium is:
- AConvection
- BConduction
- ✓Radiation
- DNone of these
Answer: C.
View full solution →Question types
Heat question types
353 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
353
Questions
7
Question groups
5
Question types
01
MCQ (1 Marks)
158 Q→02True False[1 Marks ]
12 Q→03Fill In The Blanks With Correct Alternative.[1 Marks Each]
29 Q→041 Marks Question
87 Q→052 Marks Questions
40 Q→063 Marks Question
15 Q→075 Marks Questions
12 Q→Sample Questions
Heat questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Which colour absorbs more heat?
- ✓Black
- BWhite
- CBlue
- DRed
Answer: A.
View full solution →Ventilators are provided at the top of a room:
- ATo bring oxygen for breathing.
- BSo that sunlight may enter the room.
- ✓To maintain convectional currents to keep the air fresh in the room.
- DTo provide an outlet for carbon dioxide.
Answer: C.
View full solution →Paheli Wants To Measure The Body Temperature Of Boojho. She Got $36.4$ Degree Celsius, $37.4$ Degree Celsius And $36.6$ Degree Celsius In First, Second And Third Times Respectively. What Is The Average Body Temperature Of Boojho$?$
- A$37.8$ degree Celsius.
- B$36.4$ degree Celsius.
- C$37.4$ degree Celsius.
- ✓$36.8$ degree Celsius.
Answer: D.
View full solution →$10^\circ C$ is equal to:
- A$173 K$
- B$273 K$
- ✓$283 K$
- D$183 K$
Answer: C.
View full solution →Heat cannot be transmitted in vaccum by any mode of transfer
The unit of heat is degree celsius.
Water at higher temperature feels more hot. True/ False
Shining thread in thermometer is the column of mercury. True/ False
Laboratory thermometer should be kept upright and not tilted. True/ False.
Clothes of $.........$ colours absorb more heat better than clothes of light colours.
View full solution →Fill in the blanksA cold steel spoon is dipped in a cup of hot milk. It transfers heat to its other end by the process of $.........$
View full solution →No medium is required for transfer of heat by the process of $.........$
View full solution →Temperature is measured in degree $.........$
View full solution →Temperature of boiling water cannot be measured by a $.........$ thermometer.
View full solution →Name the mode of transfer of heat in
water or air.
Which metal is used in the bulb of a thermometer?
State unit of temperature.
Which mode of transfer of heat is responsible for sea breeze and land breeze in the coastal regions?
What is the colour of water in which potassium permanganate (KMnO4) is dissolved?
In places of hot climate it is advised that the outer walls of houses be painted white. Explain.
Look at Figure. Mark where the heat is being transferred by conduction, by convection and by radiation
Discuss why wearing more layers of clothing during winters keeps us warmer than wearing just one thick piece of clothing.
Give two examples each of conductors and insulators of heat.
What is the unit of heat?
Describe in detail about the occurrence of oceanic currents.
Explain in brief, why we wear dark coloured clothes in winter and light coloured clothes in summer.
Why is mercury used as an indicator in a thermometer?
Observe the picture given as Figure. Water is being boiledb in a pan of wide base.
- Which position $P$ or $T$ will feel warmer?
- Fill up the boxes $P$ and $T$ to indicate the mode of flow of heat to the hand.
For setting curd, a small amount of curd is added to warm milk. The microbes present in the curd help in setting if the temperature of the mixture remains approximately between $35^\circ C$ to $40^\circ C$. At places, where room temperature remains much below the range, setting of curd becomes difficult. Suggest a way to set curd in such a situation.
View full solution →Match the following:
| Land breeze blows during | summer |
| Sea breeze blows during | winter |
| Dark coloured clothes are preferred during | day |
| Light coloured clothes are preferred during | night |
State similarities and differences between the laboratory thermometer and the clinical thermometer.
What are the factors on which the quantity of heat absorbed or given out by a substance during a thermal change depends?
Explain laboratory and clinical thermometer along with their function, and uses.
While reading a clinical thermometer, what precautions should we take?
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