Question # 1

Chemical bond is O2 is.

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Ionic

Covalent

Metalic

None of these

Which of the following has stble elecronic configuration.

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H

He

C

Li

Freezing of a liquid is a

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Chemical change

Chemicla property

Physical change

None of these

Wave are of .............. types.

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Two

Three

Four

Five

Which blood vessesl have valves in it.

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Capillaries

Artery

Vein

Arteriole

Chemical formula of Sulphuric Acid.

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HCl

H2SO4

HNO3

CH3COOH

Amount of solute required to saturae 100 g of solvent at a particular temperatur eis called.

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Molarity

Molality

Solubility

Normality

Entry and growth of pathogen into our body is called.

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Pathogen

Infection

Immunity

None of these

Force is

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A push

a pull

A friction

All above

The flat green part of leaf is called.

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Blade

Lamina

Both a and b

None of these

Speed of sound in water is

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1000 ms-1

1500 ms-1

900 ms-1

2000 ms-1

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