Question # 1

The forces of attraction present between the molecules of a substance are called ____________ forces.

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Intermolecular forces

Covalent

Ionic

Nil

The vertical columns in the periodic table are called:

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perlods

groups

rows

blocks

In double covalent bond, every atom provides

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1 electrons

2 electrons

4 electrons

6 electrons

The symbol of lead us

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As

Pb

Sb

Na

There are _________ types of bonds.

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1

2

3

4

Gases have ____________ shape.

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Fixed

Not Fixed

Nil

Both a & b

The no. of electrons in the valence shell of noble gases are

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2

4

8

2 or 8

Ionic compound are ________________ in water.

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insoluble

Soluble

Covalent

Solvent

Which one of the following pair has the same mass?

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1 mole of CO and 1 mole of N₂

1 mole of CO and 1 mole of CO₂

1 mole of O₂ and 1 mole of N₂

1 mole of O₂ and 1 mole of CO₂

Which one is largest?

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Exo

Peta

Atto

Pico

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

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Absorb

Radiate

Nothing

Nil

Which is kept constant in the Charle's law:

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Pressure

Temperature

Volume

Mass

105 elements were discovered by the year ________________

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1984

1974

1086

1996

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