Question # 1

Marsh gas is mostly consisted of.

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Butane

Propane

Ethane

Methane

The color of Iodine is:

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Purple

Black

Red

Pink

Which one of the followoing is the Hardest coal.

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Peat

Lignite

Bituminous

Anthracite

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What is the formula could be of the x:

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C₃H₈

C₆H₁₂

C₄H₁₀

C₂H₁₆

Just above the Earth's surface is

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Mesosphere

Stratosphere

Theremosphere

Troposphere

Chemical formula for urea is:

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NH4CNO

NH4CH

NH2CONH2

NH4CI

Alkanes give reaction only

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Addition

Decomposition

Substitution

Displacement

Which one of the following is Lewis base?

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NH₃

BF₃

H⁺

AlCl₃

Ozone id beneficial for us as it:

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absorbs infrared radiations

absorbs ultraviolet radiation

absorbs chlorofluorocarbons

absorbs air pollutants

The number of carbon atoms present in fuel oil.

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14-18

15-18

16-18

17-18

Bronsted and Lowry presented their theories of acids and bases in

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1785

1787

1923

1925

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

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CaCl₂

NaCl

CaO

Na₂SIO₃

All acids turn blue litmus.

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Red

Blue

Pinck

White

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