Question # 1

Which has metallic bond?

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H

Na

HCI

P

Diamonds is ____________

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Soft

Hard

Bulky

Nil

In diamonds, carbon are ____________ bonded.

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Tetrahedrally

Single

Double

None

Gases produced in Nelson's cell are:

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H₂ and O₂

H₂ and CI₂

H₂ and N₂

CI₂ and O₂

First energy level is denoted by:

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K

L

M

N

Which has biger particles?

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Solutions

Colloids

Suspensions

True solutions

During the formation of water from hydrogen and oxygen, which of the following does not occur?

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Hydrogen has oxidized

oxygen has reduced

oxygen gains electrons

hydrogen behaves as oxidizing agent

.................... of an atom is not fixed.

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Size

Mass

Electronegativity

Nuclear char

Which is used for industrial manufacture of NaCI?

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Daniel cell

Down's cell

Nelson's cell

None of these

________________ is the shortest period.

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6th

8th

2nd

1st

H° - H° has ________________ energy.

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Lower

Higher

Medium

Nil

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

Air is an example of:

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Gas in gas

Solid in gas

Liquid in gas

Gas in ;iquid

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