Question # 1

Hydrogenation of alkenes and alkynes takes place at room temperature in the presence of.

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Ni

Pt

Pd

Both a and b

Boiling point of alcohol in centigrade is.

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68

78

118

128

Molecular formula of butyne is .

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C₄H₆

C₃H₄

C₄H₇

C₄H₈

Some orchids attracts bees for pollination by producing.

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alkanes

almenes

alkynes

all the above.

Marsh gas is mostly :

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ethane

methane

butane

propane

The end product of oxidation of acetylene is.

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Propen glycol

Ethan glycol

Glyoxal

Oxalic acid

Chloroform is used for

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Anesthesia

Fever

Link

Toys

General formula of alkenes.

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C_n H_2n-2

C_nH_2n

C_nH_2n+2

C_nH_2n-1

Which compound do not produce in the halogenation of methane.

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Chloroform

Carbon tetrachloride

Carbon black

Chloromethane

Halogenation of alkanes in the presence of diffused sunlight takes place.

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Suddenly, only in one step

Slowly in one step

In a series of step

Fastly in two steps

Traces of acetylene are present to coal gas about.

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0.06 %

0.08%

1.1 %

90%

In shoe polished, which chemical is used.

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Ethanol

Methanol

Carbon black

Formaldehyde

Incomplete combustion of alkanes produce.

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Carbon dixoide only

Carbon monoxide only

Carbon monoxide carbon black and water

Carbon dioxide and carbon black

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