Question # 1

Composition of carbon in kerosene oil is.

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C₁₀-C₁₂

C₁₂-C₁₂

C₁₆-C₁₈

C₃₀-C₃₀

How many % age of urea is used as fertilizers?

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80%

90%

95%

98%

Which one is not the fraction of residual oil?

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Paraffin wax

Asphalt

Fuel oil

Coke

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

The nitrogen present in urea is used by plants to synthesize.

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Sugar

Proteins

Fats

DNA

The residual oil is heated above 400 c to produce.

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Lubricants

Paraffin wax

Asphalt

All

Which one of the following is not faction of crude oil.

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Paraffin wax

Asphalt

Fuel oil

Petroleum coke

Manufacturing of urea involves:

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2 steps

3 steps

4 steps

5 steps

Blast furnace usually used for the metallurgy of.

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Iron

Copper

Aluminum

Both a and b

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

Extraction of metals from its ores is called.

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Metallurgy

Mining

Griding

All

Formula of Urea is.

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KCNO

H₂N-CO-NH₂

HN-CO₂-NH

H₃N-CO-NH₃

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

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Metallurgy

Non metal

Metalloid

Alloy

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