Question # 1

A pollutant is a waste material that pollutes.

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Air

Water

Soil

All of them

Which is present 85% in natural gas?

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Ethane

Propane

Methane

Butane

Night blindness is because of deficiency of:

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Vitamin A

Protein

Vitamin C

Vitamin D

The pH of acid rain.

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2

3

4

5

Forest fires and burning of wood emit.

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CO₂

NO₂

SO₂

Cl₂

pH value normally varies from.

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0-14

1-14

7-14

10-14

The example of heterocyclic compound is.

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Benzene

Hexane

Cyclohexane

Pyridine

Clark's method is used to remove the hardness of water, in this method which is used.

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Ca(HCO₃)₂

Na-Zeolite

Ca-Zeolite

Ca(OH)₂

Which one of the not metal.

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Copper

Carbon

chromium

Iron

You want to dry a gas which one of the following salt you will use?

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CaCl₂

NaCl

CaO

Na₂SIO₃

The colour of litmus paper in strong acidic solution.

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Red

Blue

Yellow

Colourless

The reaction will attain the equilibrium if:

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Qc<Kc

Qc > Kc

Qc = Kc

Qc = 0

Which gas is also known as life gas for plants.

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CO

CO₂

O₂

NO₂

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