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Capillary action is due to

A. cohesion and gravity
B. adhesion and surface tension
C. gravity only
D. surface tension only

The energy generation in stars is due to

A. Fusion of heavy nuclei
B. Fusion of light nuclei
C. Chemical reaction
D. Fission of heavy nuclei

The Force that pulls a thing outwards i.e., away from the center while it is rotating is called the

A. centrifugal force
C. cohesive force
B. centripetal force
D. dsintegrating force

Coal is the remains of

A. lakes of lava that got trapped beneath the earth
B. various chemicals that acted on each other under the weight of overground earth
C. ancient trees and plants
D. lava

What will be the main source of energy for man in the distant future?

A. oil
B. natural gas
C. coal
D. atomic energy

With increase in temperature the viscosity of

A. gases decreases and liquid increases
B. gases increases and liquids decreases
C. both gases and liquids increases
D. both gases and liquids decrease

In industrial cities, where air is highly polluted due to smoke and where smoke- fog (smog) exists most of the time at night or in the mornings, death rate appears to be high on account of

A. eye diseases
B. skin diseases
C. lung diseases
D. heart diseases
E. Both c & d

A solar eclipse occurs when the moon comes between the sun and the earth and thereby casts its shadow on earth. But as the path of moon around earth does not lie directly in line with the orbit of earth about the sun, solar eclipses are

A. frequent
B. fixed
C. rare
D. unpredictable

Heat travels from the more hot object to the less hot object by various means. What are they called?

A. transmission
B. convection
C. transportation
D. conduction
E. radiation
F. motion
G. Both b, d & e

There is an element without which the earth life cannot survive beyond a few minutes. It forms about half of the earth’s crust and over one-fifth of the air that earth life breathes. Can you name this important element now?

A. helium
B. nitrogen
C. carbon
D. oxygen

Capillary action is due to

The energy generation in stars is due to

The Force that pulls a thing outwards i.e., away from the center while it is rotating is called the

Coal is the remains of

What will be the main source of energy for man in the distant future?

With increase in temperature the viscosity of

In industrial cities, where air is highly polluted due to smoke and where smoke- fog (smog) exists most of the time at night or in the mornings, death rate appears to be high on account of

A solar eclipse occurs when the moon comes between the sun and the earth and thereby casts its shadow on earth. But as the path of moon around earth does not lie directly in line with the orbit of earth about the sun, solar eclipses are

Heat travels from the more hot object to the less hot object by various means. What are they called?

There is an element without which the earth life cannot survive beyond a few minutes. It forms about half of the earth’s crust and over one-fifth of the air that earth life breathes. Can you name this important element now?

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