1. Which one of the following is a reliable measure?
a) Hotness b) Coldness
c) Temperature d) None of the
2. Name the device which is used to measure the hotness or coldness of an object.
a) Picometer b) Barometer
c) Manometer d) Thermometer
3. Which one is filled in the bulb of a thermometer?
a) Mercury b) Lead
c) Copper d) Silver
4. What is the normal temperature of a healthy person?
a) 37°C b) 37°F
c) 37 K d) None of these
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
6. Conduction is the method of transfer of heat in
a) liquids b) solids
c) Gases d) vacuum
7. Heat from the sun reaches to us by
a) radiation b) conduction
c) convection d) all of these
8. The noble gas used in advertising signboards is
a) Helium b) Neon c) Argon d) Krypton
32. A metal with melting point less than 50°C is
a) Gallium b) Iron c) Gold d) Aluminium
9. A metal which is neither ductile nor malleable is
a) Copper b) Silver c) Zinc d) Aluminium
10. Rust is a hydrated oxide of iron which is
a) Reddish brown b) Green c) white d) black
11. Aluminium is not used to make:
a) Foils b) Wires c) Fireworks d) Utensils
12. A metalloid used in the manufacture of microchips used in computer is:
a) Antimony b) germanium
c) Silicon d) Arsenic
13. A metalloid used to make glass:
a) Sulphur b) Germanium
c) Silicon d) Antimony
14. The property of metals by which they can be beaten in to thin sheets is called-
a) Malleability b) Ductility
c) Conduction d) Expansion
15. Which one of the following is a good conductor of electricity?
a) Iron b) Plastic c) Wood d) Glass
Answers
2-thermometer 3:mercury 15:iron
Answer:
1) c.Temperature
2)d.Thermometer
3)a.Mercury
4) a.37 °C
5)b. From a hotter object to a colder object
6)b. solid
7)a.radiation
8)b.Neon
32)a. Gallium
9)c. Zinc
10)a. reddish brown
11) c. fireworks
12)c. silicon
13)d. Antimony
14)a. malleability
15)a. iron
Explanation:
1)a) The temperature gives us an accurate idea whether a body is hot or cold.
2) d) The device which is used to measure the hotness or coldness of an object is thermometer
3) a) Mercury due to its high coefficient of expansion.
4) a) 37°C is the normal temperature of a human body.
5) heat always flows from a hot body to cold body.
6)Heat is transferred through conduction in solid
7)Heat from the sun reaches to us in the form of solar radiations.
8)Neon is filled in the signboards .
32)Gallium is a metal with melting point less than 50°C
9)Zinc is a metal which doesn't show the property of malleability and ductility.
10)The colour of rust is reddish brown.
11)'Alluminium is not used to make fireworks as it burns at high temperature.
12)silicon is used in making microchips in computer.
13)Antimony is used in making glasses.
14)Malleability is the property by which metal can be beaten into thin sheets.
15)As iron is a metal,it is good conductor of electricity.
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