Question # 1

Energy of a shell is ________________

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Variable

Constant

Cannot be changed

Nil

O3, Ozone is _________ molecules.

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Homoatomic

Hetroatomic

Monoatomic

Nil

All metals are solid except

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AI

Mg

Na

Hg

Which element has highest electronegativity?

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CI

F

Br

I

Diamonds is ____________

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Soft

Hard

Bulky

Nil

Identify when pair has polar covalent bonds:

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O₂ and Cl₂

H₂O and N₂

H₂O and C₂H₂

H₂O and HCI

Hydrogen is a ____________

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Metal

Non metal

Metalloids

Nil

Gases produced in Nelson's cell are:

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H₂ and O₂

H₂ and CI₂

H₂ and N₂

CI₂ and O₂

The empirical formula of glucose is

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CHO

CH2O

C2HO

CHO2

The earth is made up of ____________ % of aluminum.

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6

7

8

9

Which of the following can accommodate 18 electrons?

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K

L

M

N

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

Polyatomic molecules consist of _________ atoms.

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1

More than 1

Less than 1

2

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