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Question-1
The woolen clothes keep us warm during winter because
A. Wool is an insulator
B. Wool is a conductor
C. Wool traps air
D. Wool has vacuum
(A)
A and B
(B)
B and D
(C)
C and D
(D)
A and C
Question-2
Which of the following can transfer heat by radiation?
(A)
Solids only
(B)
Liquids and gases only
(C)
Gases only
(D)
Liquids, gases and solids
Question-3
A liquid which is a good conductor of heat is:
(A)
Water
(B)
Milk
(C)
Mercury
(D)
Alcohol
Question-4
Which of the following features are those of a clinical thermometer?
A. Short temperature range
B. Wide temperature range
C. Alcohol filled glass bulb
D. Constriction in glass tube
(A)
A and B
(B)
B and C
(C)
A and D
(D)
B and D
Question-5
Which of the following is not an insulator?
(A)
Brick
(B)
Bamboo
(C)
Brass
(D)
Cardboard
Question-6
The process which can transfer heat through the vacuum as well as air is:
(A)
Conduction
(B)
Convection
(C)
Irradiation
(D)
Radiation
Question-7
Which of the following is not a method of transfer of heat?
(A)
Conduction
(B)
Radiation
(C)
Convention
(D)
Convection
Question-8
Which of the following elements is used for measuring the temperature in ordinary thermometers?
(A)
Br
(B)
Pb
(C)
Cu
(D)
Hg
Question-9
The heat from the sun reaches the earth by the process of:
(A)
Conduction
(B)
Radiation
(C)
Convection
(D)
Not determined yet
Question-10
A wooden spoon is dipped in cup of ice cream. Its other end:
(A)
Becomes cool by the process of conduction
(B)
Becomes cool by the process of convection
(C)
Becomes cool by the process of radiation
(D)
Does not become cool
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Std 7
CBSE
Practice in Related Chapters
Fibre to Fabric
Nutrition In Animals
Respiration in Organisms
Nutrition in Plants
Heat
Acids,Bases and Salts
Transportation in Animals and Plants
Physical and Chemical Changes
Weather Climate and Adaptations of Animals to Climate
Wind, Storms and Cyclones
Soil
Reproduction in Plants
Motion and Time
Electric Current and its Effects
Light
Water: A Precious Resource
Forests Our Life Line
Waste Water Story
Water and its Conservation
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