Question # 1

It is heterogeneous mixture

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Sand

Milk

Air

Brass

1 torr = ?

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1 mm of Hg

1 atm

760 mm of Hg

1 pascal

Mist is an example of solution:

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liquid in gas

gas in liquid

solid gas

gas in solid

The core of the earth is mostly made from ____________

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Nickel

Iron

A % B

Copper

Pure alkali metals can be cut simply by knife but iron cannot because of alkali metals have:

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Strong metallic bonding.

Weak metallic bonding

Non- metallic bonding

Moderate metallic bonding

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 example of solution of a solid solute in a solid solvent is

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Brass

Fog

Cheese

Air

Polyatomic molecules consist of _________ atoms.

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1

More than 1

Less than 1

2

Which of the following is less malleable?

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Sodium

Iron

Gold

Sliver

There are _________ elements found till now .

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120

118

119

117

A bond formed between two non-metals is expected to be:

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covalent

ionic

coordinate covalent

metallic

One carbon is _________ times heavier than hydrogen.

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12

13

14

15

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