Question # 1

In double covalent bond, every atom provides

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1 electrons

2 electrons

4 electrons

6 electrons

Intermolecular forces are ____________ than chemical bonds.

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Stronger

Weaker

Wqual

Nil

Following are elements of 2nd period.Which atom is bigger in size?

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Li

Be

B

C

________________ are formed from chemical reactions.

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Elements

Mixture

Substance

Nil

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

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2

8

18

32

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

The reverse of evaporation is:

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Boiling

Diffusion

Condensation

Freezing

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

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Absorb

Radiate

Nothing

Nil

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

The atomic number of potassium is:

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11

15

18

19

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

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Mixture

Elements

Solution

Compound

Water dissolves ____________ compound.

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Ionic

Polar covalent

A & B

Nil

The concept of orbit was used by:

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J.J Thomson

Rutherford

Bohr

Planck

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