Question # 1

The period of Alchemists extends from _________ AD.

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800 to 1800

600 to 1600

900 to 1900

700 to 1700

____________ are good conductors of electricity.

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Covalent compound

Metals

Both

None of these

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

Which one of the following solution contains more water?

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2M

IM

0.5M

0.25M

Solids are fixed ____________

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Shape

Velocity

Mass

Atoms

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

The reaction of ionic compound is very ________________ in solution.

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Slow

Fast

Medium

Nil

L shell can accommodate ________________ electrons.

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2

8

18

32

H° + H° are ________________ in energy.

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Lower

Higher

Medium

Nil

___________ is a pure substance that can be broken down.

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Matter

Element

Mass

Mixture

Copper extracted from its ore is ____________ % pure.

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98%

99%

96%

Nil

Which one metal can be cut with a knife?

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Na

Mg

AI

Ca

The no. of Ion pair/pairs in ammonia molecule is / are

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1

2

3

4

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