Is there a 'rust in iron'?
(A) physical action
(B) Chemical activity
(C) Common verb
(D) None of these
Is water heating in the kettle an example?
(A) Conduction
(B) Convection
(C) Radiation
(D) Condensation
What is Air?
(A) element
(B) Mixture
(C) Compounds
(D) None of these
If any rock from earth is taken to the moon?
(A) its quantity will decrease
(B) its weight will decrease
(C) There will be no difference in its weight
(D) its weight will increase
Measurement of calories is unit?
(A) heat
(B) solid
(C) liquid
(D) Sound
Can bats fly in the dark as they get help?
(A) Ultraviolet wave
(B) Ultrasonic wave
(C) Radiation
(D) Special retina
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