Question # 1

Ammonical brine is prepared by dissolving ammonia gas in.

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NaCl

CaCO₃

CaCl₂

Na₂SO₄

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

How many % age of urea is used as fertilizers?

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80%

90%

95%

98%

Sindh alkalies limited was established near Karachi in.

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1965

1966

1970

2000

Brown hair contains.

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Iron compound

Copper compound

titanium compound

Both a and b

The elements that do not conduct heat and electricity are called.

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Metallurgy

Non metal

Metalloid

Alloy

Composition of carbon in kerosene oil is.

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C₁₀-C₁₂

C₁₂-C₁₂

C₁₆-C₁₈

C₃₀-C₃₀

When NaHCO₃ is heated it forms.

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CO₂

Ca(OH)₂

CaCO₃

CaO

Extraction of metals from its ores is called.

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Metallurgy

Mining

Griding

All

Formula of soda ash is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₃PO₄

At the time of partition, How many industries wee present in Pakistan.

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30

32

34

40

Bister copper is pure about;

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70%

80%

90%

98%

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