Question # 1

What is the mass of AI in 204 g of aluminium oxide Al₂O₃

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26 g

54 g

108 g

27 g

Group nuebr tells about the

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Number of shells

Number of valence electrons

Both a and b

None of these

Transition elements are

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All gases

All non metals

All Metals

All metalloids

All bases turn red litmus.

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Blue

White

Pink

Colourless

Covalent bond is most commonly found between the elements of group

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1 to 13

16 to 18

13 to 17

15 to 18

John Dalton put forward his atomic theory.

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1800

1803

1805

1903

Which acid is not used as a food or mixed with food?

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Tartaric Acid

Formic Acid

Ascorbic acid

Citric Acid

M shell has sub sheels.

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1s , 2s

1s,2s,3s

2s,2p

3s,3p,3d

In whcih state of matter does not hae definite shape and volume.

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Liquid

Gas

Solid

All of these

Activation energy of a chemical reaction must be....... the everage kinetic energy of reacting molecules.

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Equal to

Grether than

Lower than

None of these

Which isotope is used in nuclear reactors.

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U-234

U-235

U-238

All of these

The electropositive elements have the tendency to

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Lose electrons

Gain electrons

Share electrons

All of these

Which of the following grops contain alkaline earth metals.

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I A

II A

VII A

VIII A

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