Question # 1

The salts of which element are present in detergent that causes the rapid growth of algae in water bodies is.

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Phosphate

Calcium

Sodium

All of them

The number of carbon atoms present in fuel oil.

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14-18

15-18

16-18

17-18

The number of carbon atoms present in diesel oil.

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10-15

11-15

12-15

13-15

Which one of these hydrocarbon molecules would have no effect on an aqueous solution of bromine?

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CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

Which of the followings is a disaccharide?

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Glucose

Fructose

Sucrose

Starch

Blast furnace usually used for the metallurgy of.

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Iron

Copper

Aluminum

Both a and b

The process of removal of gangue form the ore is technically known as:

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concentration

purification process

metallurgy

refining

Which is not an air pollutant?

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CO₂

CO

SO₂

NH₃

The general formula of alkynes is

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C_nH_2n

C_nH_2n+2

C_nH_2n-2

C_n H_2n+1

In the bacterial decay, the compound of which element are emitted.

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Sulphur

Carbon

Nitrogen

All of them

Which gas is also known as life gas for plants.

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CO

CO₂

O₂

NO₂

Which factor determines the severity of a pollutant?

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Chemical nature

concentration

Persistence

All of them

What is pOH of 0.01 M solution of HCl?

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1

4

12

13

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