Question # 1

pH value normally varies from.

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0-14

1-14

7-14

10-14

Chemical formula of chloroform.

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CH₃Cl

CH₂O₂

CHCl₂

CCl₄

Active mass is expressed as:

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{ }

[ ]

( )

l l

Cause of Night blindness is.

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Deficiency of vitamin B

Deficiency of vitamin A

Deficiency of vitamin D

Deficiency of vitamin E

Which salt cause permanent hardness in water is:

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Ca(HCO₃)₂

Mg(HCO₃)₂

CaCl₂

KCl

Such reaction which can be made proceed in either direction depending upon the condition:

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simple reaction

reversible reaction

irreversible reaction

chain reaction

The value of constant of ionic product of water Kw at 25 C.

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1.0 x 10^-4

1.0 x 10¹⁴

1.0 x 10^-4

1.0 x 10⁴

Wood contain the amount of carbon.

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70%

80%

60%

40%

Which gas is used to prepare ammonia?

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N₂

O₂

Cl₂

S

_______ is the king of chemicals.

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Hydrochloric acid

Nitric Acid

Sulphuric acid

Phosphoric acid

Vital force theory was rejected by.

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Jabir Bin Hayan

Drawin

Wohler

Berzellius

Raw materials used in Solvay's process.

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Brine

Lime stone

Ammonia gas

All

Which one of the following ion does not cause hardness in water?

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Ca⁺²

Mg^-2

SO^-2

Na⁺

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