Question # 1

Sodium has ________________ no. of protons.

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11

12

13

14

Force per unit area is called:

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volume

pressure

weight

density

In ________________ Rutherford's was studying radiations.

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1911

1931

1921

1922

The core of the earth is ____________ than crust.

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LIghter

Heavier

Both

Nil

The lowest energy level is

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K

L

M

N

If the solute-solute forces are strong enough than those of solute- solvent force, The solute:

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dissolves readily

does not dissolve

dissolve slowly

dissolves and precipitates

At ____________ °C water converts to ice.

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101°

100°

99°C

100.2°C

The example of solution of a solid solute in a solid solvent is

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Brass

Fog

Cheese

Air

Metals from a ____________ part of earth on which we live.

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Smaller

Larger

Medium

Nil

Na__ Na++ e , what type of ionit is :

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Positive

Negative

Neutral

Charged

The third abundant as found in the earth' crust is:

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Carbon monoxide

Oxygen

Nitrogen

Argon

Concentration is ratio of:

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solvent to solute

solute to solution

solvent to solution

both a and b

________________ are formed from chemical reactions.

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Elements

Mixture

Substance

Nil

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