Q 1 – Which one of the following is a reliable measure?
(a) Hotness
(b) Coldness
(c) Temperature
(d) None of these
Ans. (c) Temperature
Q 2 – Name the device which is used to measure the hotness or coldness of an object.
(a) Picometer
(b) Barometer
(c) Manometer
(d) Thermometer
Ans. (d) Thermometer
Q 3 – Which one is filled in the bulb of a thermometer?
(a) Mercury
(b) Lead
(c) Copper
(d) Silver
Ans. (a) Mercury
Q 4 – What is the normal temperature of a healthy person?
(a) 37°C
(b) 37°F
(c) 37 K
(d) None of these
Ans. (a) 37°C
Q 5 – Heat always flows
(a) from a colder object to a hotter object
(b) from a hotter object to a colder object
(c) in both the directions
(d) heat never flows from one object to other
Ans. (b) from a hotter object to a colder object
Q 6 – Conduction is the method of transfer of heat in
(a) liquids
(b) solids
(c) gases
(d) vacuum
Ans. (b) solids
Q 7 – Heat from the sun reaches to us by
(a) radiation
(b) conduction
(c) convection
(d) all of these
Ans. (a) radiation
Q 8 – 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 than the temperature of the surroundiong.
Ans. (b) air trapped between the layers of newspaper is a bad conductor of heat.
Q 9 – A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile:
(a) is a better conductor of heat than the wooden tile.
(b) is polished while wooden tile is not polished.
(c) reflects more heat than wooden tile.
(d) is a poor conductor of heat than the wooden tile.
Ans. (a) is a better conductor of heat than the wooden tile.
Q 10 – Paheli and Boojho measured their body temperature. Paheli found her’s to be 98.6°F and Boojho recorded 37°C. 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.
Ans. (c) Both have normal body temperature.
Q 11 – Which of the following is a good conductor of heat?
(a) Iron
(b) Steel
(c) Aluminium
(d) All of these
Ans. (d) All of these
Q 12 – A device used to measure the temperature is
(a) transistor
(b) thermometer
(c) mercury
(d) none of these
Ans. (b) thermometer
Q 13 – Which of the following thermometers has a kink?
(a) Laboratory thermometer
(b) Clinical thermometer
(c) Both (a) and (b)
(d) Digital thermometer
Ans. (b) Clinical thermometer
Q 14 – What is the range of the temperature reading of a clinical thermometer?
(a) 35°C – 42°C
(b) -10°C – 110°C
(c) 0°C – 100°C
(d) 32°C – 42°C
Ans. (a) 35°C – 42°C
Q 15 – Which of the following thermometer contains mercury?
(a) Clinical thermometer
(b) Laboratory thermometer
(c) Both (a) and (b)
(d) None of these
Ans. (c) Both (a) and (b)
Q 16 – What is the range of the temperature reading of a laboratory thermometer?
(a) -10°C – 110°C
(b) 35°C – 42°C
(c) 0°C – 100°C
(d) -10°C – 100°C
Ans. (a) -10°C – 110°C
Q 17 – The transfer of heat from hotter body to colder body is called
(a) conduction
(b) induction
(c) convection
(d) radiation
Ans. (a) conduction
Q 18 – The process of transferring of heat without any contact between the source of heat and the heated object is called
(a) conduction
(b) convection
(c) radiation
(d) induction
Ans. (c) radiation
Q 19 – The normal temperature of human body is
(a) 35°C
(b) 37°C
(c) 40°C
(d) 42°C
Ans. (b) 37°C
Q 20 – The materials which allow the heat to pass through them easily are called
(a) insulators
(b) conductors
(c) semiconductors
(d) poor conductors
Ans. (b) conductors
Q 21 – Which of the following is an insulator?
(a) Wood
(b) Iron
(c) Copper
(d) Zinc
Ans. (a) Wood
Q 22 – The air from the sea is called
(a) sea breeze
(b) land breeze
(c) wind
(d) none of these
Ans. (a) sea breeze
Q 23 – Which colour absorbs more heat?
(a) Black
(b) White
(c) Blue
(d) Red
Ans. (a) Black
Q 24 – What is the SI unit of temperature?
(a) Kelvin
(b) Celsius
(c) Fahrenheit
(d) None of these
Ans. (a) Kelvin
Q 25 – Which one is filled in the bulb of a thermometer?
(a) Mercury
(b) Lead
(c) Copper
(d) Silver
Ans. (a) Mercury
Q 26 – A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile
(a) is a better conductor of heat than the wooden tile.
(b) is polished while wooden tile is not polished.
(c) reflects more heat than wooden tile.
(d) is a poor conductor of heat than the wooden tile.
Ans. (a) is a better conductor of heat than the wooden tile.
Q 27 – 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 than the temperature of the surrounding.
Ans. (b) air trapped between the layers of newspaper is a bad conductor of heat.
Q 28 – Sonu and Ria measured their body temperature Sonu found his to be 98.6°F and Ria recorded 37°C.
Which of the following statement is true?
(a) Sonu has a higher body temperature than Ria.
(b) Sonu has a lower body temperature than Ria.
(c) Both have normal body temperature.
(d) Both are suffering from fever.
Ans. (c) Both have normal body temperature.
Q 29 – Land breeze blows from
(a) lower surface to upper surface
(b) sea to land
(c) upper surface to lower surface
(d) land to sea
Ans. (d) land to sea
Q 30 – Liquid used in thermometers is
(a) alcohol
(b) mercury
(c) water
(d) oil
Ans. (b) mercury
Q 31 – Liquids and gases transfer the heat by
(a) radiation
(b) conduction
(c) convection
(d) all of these
Ans. (c) convection
Q 32 – Metals are conductors of heat.
(a) average
(b) poor
(c) good
(d) some are poor conductors
Ans. (c) good
Q 33 – Woollen clothes
(a) keep us cool
(b) decrease the body temperature
(c) increase the body temperature
(d) keep us warm
Ans. (d) keep us warm
Q 34 – Degree of hotness or coldness is called
(a) temperature
(b) power
(c) heat
(d) energy
Ans. (a) temperature
Q 35 – Sunlight reaches the earth’s surface through
(a) convection
(b) radiation
(c) conduction
(d) radio waves
Ans. (b) radiation
Q 36 – Heat is
(a) a form of energy
(b) a type of matter
(c) sometimes energy and sometimes matter
(d) none of these
Ans. (a) a form of energy
Q 37 – The normal temperature of human body is
(a) 37 K
(b) 37°F
(c) 37°C
(d) All of these
Ans. (c) 37°C
Q 38 – In solids, heat transfer takes place primarily due to
(a) conduction
(b) convection
(c) radiation
(d) none of these
Ans. (a) conduction