Question # 1

The symbol of barium is:

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Ba

Bi

Br

B

Salt & water is a _________ mixture.

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Homogeneous

Heterogeneous

It is not mixture

Nil

Mass no is represented by :

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A

B

C

D

Scientist used ___________ method.

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Scientific

Non-scientific

Bot

Non

The valency of nitrogen is

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1

2

3

4

The symbol of lead us

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As

Pb

Sb

Na

................. can be decomposed into simpler substanmce.

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Compound

Element

Solution

Mixture

A _________ is a pure substance is made up of two or more elements.

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Mixture

Elements

Solution

Compound

Na__ Na++ e , what type of ionit is :

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Positive

Negative

Neutral

Charged

The fundamental unit of elements is ___________

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Molecule

Atom

Matter

Mixture

Atoms are made of sub _________

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Atoms

Molecules

Charge

Atomic particles

Industrial chemistry deals with the manufacturing of compounds:

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in the laboratory

on micro scale

on commercial scale

on economic scale

_________ shells of noble gases is complete.

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Outer most

2

1

Nil

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