Question # 1

How many % age of nitrogen present in air by volume?

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70%

75%

78%

80%

How many units are in Pakistan for manufacturing of Urea.

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3

6

9

12

Imperial chemical industries was established in.

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1942

1944

1950

1990

The number of carbon atoms present in gasoline or petrol.

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5-10

6-10

7-10

8-10

Catalyst used in Haber's process is:

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Ni

Fe

Cu

Zn

In smelting process a small amount of coke is required because:

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it is highly endothermic process

it is highly exothermic process

it is very fast process

it is very slow process

Blonde hair contains compounds of:

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molybdenum

iron

titanium

copper

How many percentage blister copper is pure?

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95%

75%

98%

100%

Raw materials used in Solvay's process.

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Brine

Lime stone

Ammonia gas

All

When CO₂ is passed through the ammonical brine the only salt that precipitates is:

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NaHCO₃

NH₄HCO₃

Na₂CO₃

(NH₄)₂CO₃

Extraction of metals from its ores is called.

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Metallurgy

Mining

Griding

All

the chemical formula of chalcopyrite is:

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Cu₂S

CuFe₂S

CuS

FeS

How many % age of urea is used as fertilizers?

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80%

90%

95%

98%

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