Class 7 Science Chapter 4 MCQ

Class 7 Science Chapter 4 MCQ (Multiple Choice Questions) of Heat. These Multiple Choice Questions with four choices contains about 120 questions divided into 12 sets in the format of test series, updated for new academic session 2021-22.

All the questions are taken form NCERT Textbook and Exemplar books only. It covers the entire chapter 4 of grade 7 Science including all important terms.

Class 7 Science Chapter 4 MCQ for 2021-22

Class:7
Subject:Science
Contents:Multiple Choice Questions – MCQ Tests

Class 7 Science Chapter 4 MCQ Tests for 2021-22

Class 7 Science Chapter 4 MCQ are given below with explanation of each answer. There are sufficient number of tests to practice chapter 4 of 7th Science. These tests make a student confident about the concepts related to standard 7 Science. Give test and practice with important questions if required. If you have more questions to ask, please visit to Discussion Forum.




Q1

In which of the statement is or are correct about “thermometer”?

[A]. Don’t hold the thermometer by the bulb
[B]. Don’t washed thermometer by any liquid
[C]. Don’t jerks the thermometer before use
[D]. Don’t use clinical thermometer for the person who works in sunlight
Q2

Boojho wonders why the level of mercury should change at all when the bulb of the thermometer is brought in contact with another object.

[A]. Because mercury is a liquid material
[B]. Because bulb have no kink
[C]. Temperature of object may not same as mercury
[D]. Every object has different temperature
Q3

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
[D]. 36.8 degree Celsius
Q4

Boojho wants to know that when a cold steel spoon is dipped in a cup of hot milk. It transfer heat to its other end by the process of

[A]. Conduction
[B]. Convection
[C]. Radiation
[D]. Semi convection
Q5

A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because

[A]. Friction between the layers of newspaper produces heat.
[B]. Air trapped between the layers of newspaper is a bad conductor of heat.
[C]. Newspaper is a conductor of heat.
[D]. Newspaper is at a higher temperature then the temperature of the surroundings.




Q6

Which of the following is a poor conductor of heat?

[A]. Silver
[B]. Aluminum
[C]. Brass
[D]. Tungsten
Q7

Who invented thermos flask?

[A]. Sir James Dewar
[B]. Sir Isaac Newton
[C]. Sir Thomas Alva Edison
[D]. Sir Antoine Lavoisier
Q8

Which of the following statement is or are incorrect?

[A]. Mercury expands easily on heating.
[B]. Mercury is easily visible being shining and opaque.
[C]. Mercury is considered as toxic substance.
[D]. Mercury is the liquid (non-metal)
Q9

In which of the statement is or incorrect?

[A]. A clinical thermometer consists a non-uniform glass tube.
[B]. Thermometric liquids can be seen in clinical thermometer.
[C]. The temperature of every person may not be 37 degree Celsius.
[D]. All the above
Q10

Which type of heat transfer is actually minimized when using a thermo flask?

[A]. Conduction
[B]. Convection
[C]. Radiation
[D]. All the above.



Q11

In which of the following statement is or are incorrect?

[A]. Heat is a form of energy.
[B]. Heat flows from one object to another object when there is a difference in temperature.
[C]. In the transmission of heat total amount of heat remains unchanged.
[D]. None of the above
Q12

Boojho wants to know that why it is advised to use digital thermometer?

[A]. It is cheap and available everywhere.
[B]. As a digital it does not require any contact to measuring temperature.
[C]. It does not use of mercury.
[D]. Every point can be seen by a “beep sound”.
Q13

Paheli and Boojho measured their body temperatures. Paheli found her’s to be 98.6 degree Fahrenheit and Boojho recorded 37° Celsius. Which of the following statement is true?

[A]. Paheli has a higher body temperature than Boojho
[B]. Paheli has a lower body temperature than Boojho
[C]. Both have normal body temperature
[D]. Both are suffering from fever
Q14

“We should avoid keeping the thermometer in the sun or near a flame”: Why?

[A]. Automatically it may break
[B]. It measures flame temperature
[C]. Sun temperature can be measured
[D]. Vapour can create under thermometer
Q15

Paheli wants to know that is it possible to construct building which are not affected by heat?

[A]. Building made by soil
[B]. Wooden bricks are used in the building
[C]. Hollow bricks are used for making building
[D]. White colored cement bricks are used in building



Q16

Paheli wants to know in which conditions clinical thermometer can be break?

[A]. When kept in Sun
[B]. When hits by hard objects
[C]. When dipped in hot tea
[D]. All the above
Q17

Boojho has three thermometers. He wants to measure the temperature of his body and that of boiling water. Which thermometer(s) should he choose?

[A]. Clinical thermometer for measuring body tem. and laboratory thermometer for measuring the tem. of boiling water
[B]. Clinical thermometer for measuring temperature of both.
[C]. Laboratory thermometer for measuring temperature of both.
[D]. Digital thermometer for measuring temperature of both.
Q18

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
[D]. 36.8 degree Celsius
Q19

An iron ball at 40 degree Celsius is dropped in a mug containing water at 40 degree Celsius. The heat will

[A]. Flow from iron ball to water
[B]. Not flow from iron ball to water or from water to iron ball
[C]. Flow from water to iron ball
[D]. Increase the temperature of both
Q20

Stainless steel pans are usually provided with copper bottoms. The reason for this could be

[A]. Copper bottom makes the pan more durable
[B]. Such pans appear colorful
[C]. Copper is a better conductor of heat than the stainless steel
[D]. Copper is easier to clean than the stainless steel




Q21

Why should we avoid keeping the thermometer in the sun or near a flame?

[A]. It measures flame temperature
[B]. Sun temperature can be measured
[C]. Automatically it may break
[D]. Vapour can create under thermometer
Q22

Read the following statement carefully and choose which statement(s) are correct?

[A]. Clothes of white colour absorb more heat than blue colours.
[B]. Iron is the better conductor of heat than aluminium.
[C]. Our body is a poor conductor of electricity.
[D]. None of the above
Q23

It is advised not to hold the thermometer by its bulb while reading it

[A]. Bulb can be burst
[B]. Thermometer will not work
[C]. Level of mercury decrease
[D]. None of the above
Q24

At a campsite there are tents of three shades. One made with black fabric and other is white fabric and one is black and white combination. Which will you prefer for resting on a hot summer afternoon?

[A]. Black fabric
[B]. White fabric
[C]. Combination of both
[D]. None of the above.
Q25

One litre of water at 30 degree Celsius is mixed with one litre of water at 50 degree Celsius. The temperature of the mixture will be

[A]. 80 degree Celsius
[B]. More than 50 degree Celsius but less than 80 degree Celsius
[C]. 20 degree Celsius
[D]. Between 30 degree Celsius and 50 degree Celsius




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Thermos flask

Thermos flask is a special type of vessel which keeps hot liquids hot and cold liquids cold. It is made in such a way as to reduce the loss of heat by conduction, convection and radiation to minimum. It is a double walled glass vessel. The space between the two walls has no air in it. It is a vacuum indeed. The inside of the outer wall and outside of the inner wall are brightly polished with silver. The whole system is enclosed in a metal case. It is supported on corks or rubber pieces on all sides. The mouth too is closed with a cork.

How it Works

The vacuum between the walls prevents the flow of heat of conduction and convection. As for radiation, the brightly polished outer surface of the inner wall is a slow radiator of heat. The little heat that radiates is reflected back by the inner brighter surface of the outer wall. So, the hot liquid remains hot for a long time in the flask.

What is thermometer in Class 7 Science Chapter 4?

The device which measures the degree of hotness is called thermometer.

Which type of surfaces are good absorbers of heat as in 4th Chapter of Class 7 Science?

Black and rough surfaces are good absorbers of heat.

Which type of surfaces are poor absorbers of heat according to 7th Science ch. 4?

White and smooth surfaces are poor absorbers of heat.

Which scale is used for measuring heat in scientific work in Chapter 4 of 7th Science?

Temperature is generally measured in Celsius or Fahrenheit scale. Kelvin scale is used for scientific work.