161.

Liquid hydrocarbon is converted into mixture of gaseous hydrocarbons by

• cracking

• oxidation

• hydrolysis

• distillation under reduced pressure

Which of the following is the most reactive towards ring nitration?

• Benzene

• Toluene

• Mesitylene

• m-xylene

Compounds (A) gives two mol acetone and glyoxal on ozonolysis?

• 2, 5-dimethyl hexyne

• 2, 5-dmethyl hex-3-ene

• 2, 5-dimethyl hex-2-yne

• 2, 5-dimethyl hexa-2, 4-diene

The degree of unsaturation of C₆H₆ and butyne-2 respectively are

• 6 and 3

• 6 and 2

• 2 and 6

• 4 and 2

A salt producing hydrocarbon among these compounds is

• ethane

• methane

• ethene

• ethyne

Octane numberis zero for

• n-octane

• iso-octane

• n-heptane

• iso-heptane

Among the following alkenes, which one is ,the most stable?

• CH₂=CH₂

• CH₃-CH=CH₂

• CH3-CH=CH-CH₃

• (CH₃)₂C=C(CH₃)₂

In acetylene molecule, the two carbon atoms are linked by

• one sigma-bond and two pi-bonds

• two sigma-bonds and one pi-bond

• three sigma-bonds

• three pi-bonds

Pick out the alkane which differs from the other members of the group

• 2,2-dimethyl propane

• pentane

• 2-methyl butane

• 2,2-dimethyl butane

On treating a mixture of two alkyl halides with sodium metal in dry ether, 2-methyl propane was obtained. The alkyl halides are

• 2-chloropropane and chloromethane

• 2-chloropropane and chloroethane

• chloromethane and chloroethane

• chloromethane and 1-chloropropane