Question # 1

For ________________ "like dissolves like".

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Metals

Bonds

Solubility

Nil

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

Salt & water is a _________ mixture.

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Homogeneous

Heterogeneous

It is not mixture

Nil

H2O is what type of molecules it is:

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Manoatomic

Polyatomic

Pentaatomic

Nil

____________ is prevented by Metallic coating.

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NaCl

Rust

All

None of these

At ____________ °C water converts to ice.

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101°

100°

99°C

100.2°C

Formation of water form hydrogen and oxygen is:

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Redox reaction

Acid-base reaction

Neutralization

Decomposition

The example of solid solute in gas solvent is

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butter

Sugar in water

Smoke in air

Opals

The mixture of two component is called .

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Homogeneous mixture

Binary solution

Both a & b

Nil

Which one of the following is liquid in solid solution?

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sugar in water

butter

opal

fog

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

The number of periods is:

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6

7

8

9

_________ elements naturally occurring.

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92

118

93

117

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