Question # 1

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

The number of carbon atoms present in kerosene oil.

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8-12

9-12

10-12

11-12

Formula of baking soda is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₂PO₄

Sindh alkalies limited was established near Karachi in.

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1965

1966

1970

2000

The raw materials for the manufacturing of urea are.

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Ammonia

Carbondioxide

Limestone

a & b

Chalco-pyite is an ore of:

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iron

aluminium

silver

copper

Formula of soda ash is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₃PO₄

Ammonical brine is prepared by dissolving ammonia gas in.

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NaCl

CaCO₃

CaCl₂

Na₂SO₄

How many % age of nitrogen in urea fertilizers?

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40.6

45.6

46.6

50

Concentration is a .

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Mixing technique

Separating technique

Boiling technique

cooling technique

In solvay's process slaked lime is used to:

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Prepare CO₂

Prepare quick lime

Recover ammonia

Form Na₂CO₃

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

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30

32

34

40

Extraction of metals from its ores is called.

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Metallurgy

Mining

Griding

All

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10th Class Chemistry Chapter 16 Chemical Industries English Medium KPK Boards Online Mcqs MCQs With Answers

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