Question # 1

________________ proposed that matter is composed of small particles.

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Greek

English's

Russian

Nil

The smallest under of an ionic compound is

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Atom

Formula unit

Ion

Molecule

The period of Alchemists extends from _________ AD.

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800 to 1800

600 to 1600

900 to 1900

700 to 1700

4^th and 5^th period of the long form of periodic table are called

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short periods

Normal periods

Long periods

Very long periods

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

It is a triatomic molecule

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Sodium chloride

Water

Chalk

Glucose

Dissolution in water is due to ____________ bonding.

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Ionic

Covalent

Hydrogen

Nil

One carbon is _________ times heavier than hydrogen.

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12

13

14

15

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

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0

-2

-1

1

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

In ________________ Rutherford's was studying radiations.

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1911

1931

1921

1922

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