Question # 1

Es is symbol of :

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Erbium

Einsteinium

Europium

Fremium

Graphite is ___________

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Hard

Nil

Soft

Nil

___________ is a pure substance that can be broken down.

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Matter

Element

Mass

Mixture

Metals are covered by using.

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Baeyer's test

Bohr's

Electrolysis

None

Brine is an aqueous solution of

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NaCI

NaOH

AgNO3

CaO

The practical unit of concentration is

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%v/v

%v/m

%m/m

M

A heterogeneous mixture of different substance are called:

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Solution

Suspension

Colloids

Nil

_____________ revolves in orbits around nucleus.

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Electron

Proton

Neutrons

Nil

Which element has highest electronegativity?

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CI

F

Br

I

Which one of the following is liquid in solid solution?

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sugar in water

butter

opal

fog

Protons carry _________ charge.

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+

_

No

Neutral

L shell can accommodate ________________ electrons.

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2

8

18

32

CO2 the oxidation number of C =.

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+1

+2

+3

+4

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