Question # 1

Long form of periodic Table is constructed the basis of:

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Mendeleev postulate

atomic number

atomic mass

mass number

Which one of the following element is found in most abundance in the earth's crust?

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Oxygen

Aluminum

Silicon

Iron

The component of solution in larger amounts is ____________

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Solute

Solvent

a & b

Nil

Alpha particles are double charged.

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Negative

Positive

Can be both

Nil

Force per unit area is called:

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volume

pressure

weight

density

Gold was used for utensils as early as ____________ BC.

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3400

3500

3600

3700

The vertical columns in the periodic table are called:

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perlods

groups

rows

blocks

During the formation of water from hydrogen and oxygen, which of the following does not occur?

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Hydrogen has oxidized

oxygen has reduced

oxygen gains electrons

hydrogen behaves as oxidizing agent

The earth is made up of ___________ % of iron.

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4

5

6

7

The no.of electrons in the valence shell of noble gases is

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1

6

7

8

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

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catalyst

coolant

reactant

absorber

Metal oxides are

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Amphoteric

Basic

Acidic

Neutral

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

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