Question # 1

The practical unit of concentration is

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%v/v

%v/m

%m/m

M

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

____________ are good conductors of electricity.

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Covalent compound

Metals

Both

None of these

In diamonds, carbon are ____________ bonded.

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Tetrahedrally

Single

Double

None

Ionic compound are ________________ in water.

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insoluble

Soluble

Covalent

Solvent

Which is kept constant in the Charle's law:

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Pressure

Temperature

Volume

Mass

The core of the earth is ____________ than crust.

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LIghter

Heavier

Both

Nil

The earth is made up of ____________ % of aluminum.

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6

7

8

9

Carbon exists in ________________ allotropic forms.

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1

2

3

4

The modern periodic table is based on:

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Atomic number

Mass number

Relative mass

Nil

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

Deuterium is used to make:

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light water

heavy water

soft water

hard water

In ________________ Bohr considered hydrogen atom for his model .

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1913

1916

1917

1918

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