Question # 1

Ethyne is oxidized by alkaline KMnO₄ then ....... hydroxyl group add to the triple bond.

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Two

Three

Four

Five

Alkynes are also called.

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Olefine

Ethene

Paraffins

Acetylenes

Marsh gas is mostly :

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ethane

methane

butane

propane

Dehalogenation of tetrahalides produces acetylene. This reaction takes place in the presence of

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Sodium metal

Zinc metal

Magnesium metal

Potassium metal

Some orchids attracts bees for pollination by producing.

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alkanes

almenes

alkynes

all the above.

Dichloromethane reacts with halogens in the presence of diffused sun light and produces

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Carbon tetrachloride

Chloroform

Chloromethane

No reaction

The molecular formula of the first three members of the alkane hydrocarbons are CH_4,C₂H₆ and C₃H₈. What is the molecular formula for the eight alkane member, octane, which is found is petrol?

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C₈H₈

C₈H₁₆

C₈H₁₈

C₈H₂₀

When bromine water is added to acetylene its red-brown colour is changed into:

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red

green

violet

discharged

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

Chemical formula of chloroform is :

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CH₂Cl₂

CH₃Cl

CHCl₃

CCl₄

General formula of alkenes.

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C_n H_2n-2

C_nH_2n

C_nH_2n+2

C_nH_2n-1

The end product of oxidation of acetylene is .

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Oxalic acid

Glyoxal

Glycol

None of these

Oxidation of Ethene with KMnO₄ produces.

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Oxalic acid

Glyoxal

Ethene Glycol

Propene glycol

Which hydrocarbon molecule would have no effect on the aqueous solution of bromine?

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CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

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 one of the following is gas at room temperature:

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C2H6

C6H14

C6H6

C8H18

Which of following dehydration of alcohols take place:

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NaOH

KOH

H₂SO₄

HCl

In which one of the following is a substitution reaction?

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Halogenations of alkynes

Halogenations of alkenes

Halogenations of alkanes

Bromination of alkenes

Which gas creates suffocation and causes death?

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CO

CO₂

SO₃

SO₂

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