Pharm.D_POC_Allcyclic Compounds & Dienes_MCQ
1.The angle strain in cyclobutane is
A) 24°44’
B) 29°16’
C) 19°22’
D) 9°44’
2.Identify the incorrect statement regarding cycloalkanes
a) These have sp3 hybridized carbons
b) These have tetrahedral bond angles
c) Stability of cycloalkanes varies directly with their respective size d) These undergo nucleophilic substitution reactions
3. Identify the compound with the highest ring strain
a) Cyclohexane
b) Cyclopropane
c) Cyclopentane
d) Cyclobutane
4.A cycloalkane with 10 carbons will have _____ hydrogen atoms
a) 10 b) 18 c) 20
d) 22
5.Cycloalkanes are associated with the general formula
a) CnH2n+2 b) CnH2(n+2)
c) CnH2n+1-r
d)CnH2(n+1-r)
6.What is the normal tetrahedral bond angle
a) 109°
b) 107°
c) 109.5°
d) 107.5°
7.Which of the following cyclohexane undergos ring opening cum addition
a) Cyclopropane
b) Cyclopentane
c) Cyclohexane
d) Cycloheptane
8.What is the angle of strain in cyclopropane
a) 24°04'
b) 24°14'
c) 24°24'
d)24°44'
9.What is the angle of strain in cyclobutane
a) 9°24'
b) 9°34'
c) 9°44'
d) 9°54'
10.Which among the following is the most stable form of cyclohexane
a) Chair
b) Boat
c) Twisted chair
d) Twisted boat
1.The angle strain in cyclobutane is
A) 24°44’
B) 29°16’
C) 19°22’
D) 9°44’
2.Identify the incorrect statement regarding cycloalkanes
a) These have sp3 hybridized carbons
b) These have tetrahedral bond angles
c) Stability of cycloalkanes varies directly with their respective size d) These undergo nucleophilic substitution reactions
3. Identify the compound with the highest ring strain
a) Cyclohexane
b) Cyclopropane
c) Cyclopentane
d) Cyclobutane
4.A cycloalkane with 10 carbons will have _____ hydrogen atoms
a) 10 b) 18 c) 20
d) 22
5.Cycloalkanes are associated with the general formula
a) CnH2n+2 b) CnH2(n+2)
c) CnH2n+1-r
d)CnH2(n+1-r)
6.What is the normal tetrahedral bond angle
a) 109°
b) 107°
c) 109.5°
d) 107.5°
7.Which of the following cyclohexane undergos ring opening cum addition
a) Cyclopropane
b) Cyclopentane
c) Cyclohexane
d) Cycloheptane
8.What is the angle of strain in cyclopropane
a) 24°04'
b) 24°14'
c) 24°24'
d)24°44'
9.What is the angle of strain in cyclobutane
a) 9°24'
b) 9°34'
c) 9°44'
d) 9°54'
10.Which among the following is the most stable form of cyclohexane
a) Chair
b) Boat
c) Twisted chair
d) Twisted boat
11.How do we convert benzene to cyclohexane
a) Wurtz reaction
b) Clemmensen reduction
c) Simmons Smith reaction
d) Catalytic reduction
12.What is the angle of strain in cyclohexane
a) 5°44'
b) -5°44'
c) 5°16'
d)- 5°16'
13.Which among the following dienes undergo addition with the help of radical-chain mechanism? a) Cumulated dienes
b) isolated dienes
c) simple dienes
d) Conjugated dienes
14.Identify the statement which is related to Diels-Alder reaction
a) It is very stereospecific
b) Molecular distortion takes place
c) Cyclic dienes react very slow than the linear chain dienes
d) Addition of maleic anhydride to cyclopentadiene causes diene and dienophile to produce different product
15.How many sigma bonds are there in 1,3 -butadiene?
a) 3 b) 6 c) 9
d) 12
16.1,3-butadiene is a) a planar compound
b) a cumulated diene
c) an isolated diene
d) a conjugated diene
17.Which diene is the most stable
a) Isolated diene
b) Cumulated diene
c) Conjugated diene
d) Vicinal diene
18.Dienes preferably undergo
a) Substitution
b) Elimination
c) Addition
d) Cyclisation
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