Question # 1

Freezing of a liquid is a

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Chemical change

Chemicla property

Physical change

None of these

SI unit of time is.

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S

min

hr

all above

The average life span of RBCs is.

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110 days

115 days

118 days

120 days

The contraction of the objects on cooling is due to.

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Reduction in size of the particles

Increase in size of the particles

Increase in inter particles distances

Decrease in inter particle distances

Moon takes....... days to move once around the Earth.

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365

30

28

29

The humna circulatory system is consist of

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Heart

Blood

Blood vessels

All of these

------------ waves are produced in stretched string.

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Longitudinal wave

Elecromagnetic wave

Transverse wave

None of these

The outer layer of human skin is

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Endodermis

Cortex

Pitch

Epidermis

Zince oxide is ............... solid substances.

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Red

White

Yellow

Blue

A batsman hits the ball back towards the bowler, which effect of force is seen.

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change of shape

Change of direction

Change of stae from motion to rest

Change of state form rest to motion.

Which diseae is an allergic response for the body to substance like pollen and household dust.

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Pnemonia

Asthma

Flue

None of these

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