Question # 1

Which is the substitution reaction in the following?

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Halogenation of alkenes

Halogenation of alkynes

Bromination of alkene

Halogenation of alkanes

Substitution reaction is the characteristics of.

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Alkanes

Alkenes

Alkynes

None of these

How many percent of natural gas is consisted of methane.

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60%

70%

80%

85%

The order of reactivity of hydrogen halides with alkenes is.

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HI>HBr

HBr>HI

HCl>HBr

HBr < HCl

The end product of oxidation of acetylene is .

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Oxalic acid

Glyoxal

Glycol

None of these

Hydrogenation of vegetable oil to convert it into banaspatic ghee is carried out in the presence of catalyst:

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Ni-metal

Zn-metal

Na - Metal

Fe2O3

Some orchids attracts bees for pollination by producing.

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alkanes

almenes

alkynes

all the above.

Alkanes do not react in

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Diffused sunlight

Dark

Bright sunlight

None of these

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

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CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

Alkanes are least reactive compounds because they are.

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Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next number of the same homologous series.

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C₉H₁₈

C₉H₁₆

C₉H₂₀

C₉H₁₂

How trace amount of acetylene present in the coat gas.

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0.06%

0.07%

0.08%

0.09%

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