Question # 1

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 hydrocarbon decolorizes the pink colour of acidic solution of potassium permanganate?

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CH₄

C₂H₄

C₂H₆

C₂H₅

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

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

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CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

General formula of alkynes is:

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C_nH_n

C_nH_2n

C_nH_2n+2

C_nH_2n-2

Condensed formula of ethane is

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C₃Cl₈

C₂Cl₆

H₃CCH₃

None of these

Dehalogenation of Tetrahalides takes place in the presence of .

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K

Mg

Na

Zn dust

The reduction of alkyl halides takes place in the presence of

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Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

The reduction of alkyl halides takes place in the presence of.

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Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

Halogenation of methane produces following valuable chemical compounds used as solvents except.

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Carbonterachloride

Chloroform

Carbon Black

Chloromethane

In shoe polished, which chemical is used.

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Ethanol

Methanol

Carbon black

Formaldehyde

Alkanes are least reactive compounds because they are.

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Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

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