Question # 1

Carbon exists in ________________ allotropic forms.

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1

2

3

4

Transfer of electrons between atoms results in:

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metallic bonding

ionic bonding

covalent bonding

coordinate covalent bonding

Non-metals do not reaction with

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Strong bases

Concentrated acids

Dilute acids

Salts

_________ elements naturally occurring.

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92

118

93

117

Which is an acceptor molecule/ion?

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N₂

O₂

H⁺

CH₄

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

4^th and 5^th period of the long form of periodic table are called

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short periods

Normal periods

Long periods

Very long periods

Neutrons have _________ charge.

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+

_

No

Nil

L shell can accommodate ________________ electrons.

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2

8

18

32

The isotopes C-12 is present in abundance of:

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96.6%

97.6%

99.7%

None of these

Which one of the following is brittle?

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Sodium

Aluminum

Selenium

Magnesium

In double covalent bond, every atom provides

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1 electrons

2 electrons

4 electrons

6 electrons

The 2nd and third periods are called

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short period

Normal period

Long period

Very long period

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