Question # 1

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

One mole of sodium = ______ .

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24 g

25 g

26 g

23 g

Which of the following can be separated by physical means?

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Mixture

Element

Compound

Radical

Electron _____________ energy when thy jump from higher to lower level.

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Absorb

Radiate

Nothing

Nil

The equation of relationship between atomic number (Z) and mass number (A) is

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A = Z + N

A = Z - n

A = Z

A =2Z + n

The number of proton in an atom is called _________ number.

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Molecule

Formula

Atomic

Molar

Neutrons have _________ charge.

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+

_

No

Nil

The atomic number of sodium is ............... .

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9

10

11

12

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

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Carbon monoxide

Oxygen

Nitrogen

Argon

It is a triatomic molecule

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Sodium chloride

Water

Chalk

Glucose

Potassium's atomic no. is :

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17

18

19

20

Which one is largest?

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Exo

Peta

Atto

Pico

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

The branch of chemistry which deals with qualitative & quantitative analysis of matter is :

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Analytical

Nuclear

Biochemistry

Organic

O3, Ozone is _________ molecules.

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Homoatomic

Hetroatomic

Monoatomic

Nil

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