Question # 1

D-block consists of:

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4th,5th & 6th periods

2nd, 3rd & 4th periods

1st, 2nd, & 3rd periods

The 2nd and third periods are called

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short period

Normal period

Long period

Very long period

If the solute-solute forces are strong enough than those of solute- solvent force, The solute:

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dissolves readily

does not dissolve

dissolve slowly

dissolves and precipitates

The fundamental unit of elements is ___________

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Molecule

Atom

Matter

Mixture

1 torr = ?

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1 mm of Hg

1 atm

760 mm of Hg

1 pascal

Gold was used for utensils as early as ____________ BC.

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3400

3500

3600

3700

Alpha particles are double charged.

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Negative

Positive

Can be both

Nil

For diagnosis of goiter in thyroid gland we use

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Co-60

C-14

I-131

Sr-90

An atom having six electrons in its achieve noble electronic configuration by:

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gaining one electron

losing all electrons

gaining two electrons

losing two electrons

Metals lose their electrons easily because:

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They are electronegative

They have electron affinity

They are electropositive

Good conductors of heat

The maximum no.of electrons that can be accommodated in M shell are

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2

8

18

32

First energy level is denoted by:

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K

L

M

N

________________ proposed that matter is composed of small particles.

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Greek

English's

Russian

Nil

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