Question # 1

Number of protons+ neutrons is :

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Atomic mass

Mass numbers

Both

Nil

Sodium - potassium alloy is used in nuclear reactor as a:

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catalyst

coolant

reactant

absorber

The quantity of a matter in a body is called ____________

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Mass

Weight

Atom

Molecule

Mass per unit volume is:

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Velocity

Dencity

Pressure

Nil

The earth is made up of ____________ % of aluminum.

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6

7

8

9

The modern periodic table is based on:

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Atomic number

Mass number

Relative mass

Nil

It is a triatomic molecule

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Sodium chloride

Water

Chalk

Glucose

The earth is made up of ___________ % of calcium.

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4

5

6

7

Solids are fixed ____________

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Shape

Velocity

Mass

Atoms

_____________ revolves in orbits around nucleus.

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Electron

Proton

Neutrons

Nil

When temperature of water drops to ____________ °C it convert onto ice.

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0

-2

-1

1

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

Which molecule has single covalent bond?

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O₂

N₂

CI₂

CO₂

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