Multiple Choice QuestionsAmong 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
A.
one sigma-bond and two pi-bonds
In acetylene molecule, both carbon are sp-hybrid. The two unpaired p-orbitals from π-bond by overlapping with each other. One sp-orbital is σ- bonded to s-orbital of H-atom while the rest sp-orbital is σ-bonded to sp -orbital of other C-atom.
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
Which one of the following statements about benzyl chloride is incorrect?
It is less reactive than alkyl halides
It can be oxidised to benzaldehyde by boiling with copper nitrate solution
It is a lachrymatory liquid and answers Beilstein's test
It gives a white precipitate with alcoholic silver nitrate
Which cycloalkane has the lowest heat of combustion per CH2 group?
Cyclopropane
Cyclobutane
Cyclopentane
Cyclohexane
A gas decolourised by KMnO4 solution but gives no precipitate with ammoniacal cuprous chloride is
ethane
methane
ethene
acetylene
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