Question # 1

Which one of the following gases is used in welding purpose usually

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Methane

Ethane

Ethene

Acetylene

Which one of the following is formed when ethyne is heated in copper tube at 300 ^oC

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Ethene

Ethane

Benzene

Cyclohexane

The general formula for Alkene having one double bond is

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C_nH_2n+1

C_nH_2n

C_nH_2n-2

C_nH_2n+2

Which one is used for manufacture of fertilizers

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Methane

Ethane

Ethene

Ethyne

Vinyl acetlylene reach with HCl to form

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Polycetylene

Benzene

Chloroprene

Divinylacetylene

A gas decolorizes alkaline KMnO4 but has no action with ammoniacal AgNO3, this gas may be

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C2H2

C2H4

C2H6

CH4

The number of acidic hydrogen present in 1- Propyne is

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1

2

3

4

Ranney nickel is prepared by reacting dilute NaOH solution with.

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Nickel

Brass

Nickel and aluminum alloy

Nickel oxide

Which one of the following compounds will form red precipitate with ammoniacal cuprous chloride

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Acetylene

Ethylene

Benzene

Methane

When methane reacts with Cl₂in the presence of diffused light the products obtained are

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Chloroform only

Carbon tetrachloride only

Chloromethane and dichloromethane

Mixture of a, b, c

Which one of the following gases is used welding purpose usualy.

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Methane

Ethane

Ethene

Acetylene

Saturated hydrocarbon are also called.

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Olefins

Acetylenes

Paraffins

Alicyclic

Which is called marsh gas

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S2Cl2

SOCl2

CH4

CHBr3

The presence of a double bond in a compound is the sign of

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Saturation

Un-saturation

Substitution

None of these

Acetylene polymerized in the presence of ammonium chloride and cuprous chloride ot form.

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Benzene

PVC

Di vieiyl acetylene

Polyethene

Which one of the following substances have garlic odour and a colourless gas.

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CH3OH

HCOOH

CH2=CH2

HC= CH

Which one of the following gases is prepared by heating a mixture of sodium acetate and sodium hydrozide.

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CH4

CH2-CH3

CO2

CO

The catalytic oxidation of methane produces

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CO + H₂O

CO₂+ H₂O

C₂+ H₂O

H₃C - OH

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