Alkenes(Geometrical Isomerism: Mechanism of Electrophilic Addition: Addition of Hydrogen, Halogens,... ) NEET Questions

Organic Chemistry - Hydrocarbons

Alkenes(Geometrical Isomerism: Mechanism of Electrophilic Addition: Addition of Hydrogen, Halogens,... ) MCQ Questions


7.
Which is the correct order of melting points for solid cis and trans isomers?
A.
Both have equal m.p.
B.
Cis has higher m.p. than trans
C.
Cis melts at exactly half the temperature of trans
D.
Trans isomer has higher melting point than cis isomer
😑 View Answer Rough Work Error
ANSWER :
D. Trans isomer has higher melting point than cis isomer
8.
Which alkene shows cis-trans isomerism?
A.
(CH3)2C=CH-C2H5
B.
C6H5-CH=CH-CH3
C.
(CH3)2C=CH2
D.
CH2=CBr2
😑 View Answer Rough Work Error
ANSWER :
B. C6H5-CH=CH-CH3
9.
How many geometrical isomers are possible for hexa-2,4-diene (CH3-CH=CH-CH=CH-CH3)?
A.
4 (cis-cis, cis-trans, trans-cis, trans-trans)
B.
3 (cis-cis, trans-trans, cis-trans)
C.
2 (cis and trans only)
D.
1
😑 View Answer Rough Work Error
ANSWER :
B. 3 (cis-cis, trans-trans, cis-trans)
10.
In CHCl=CHCl, the cis isomer has:
A.
Two Cl on same carbon
B.
Higher m.p. than trans isomer
C.
Two Cl atoms on opposite sides and zero dipole moment
D.
Two Cl atoms on the same side and a non-zero dipole moment
😑 View Answer Rough Work Error
ANSWER :
D. Two Cl atoms on the same side and a non-zero dipole moment
11.
Which compound exhibits geometrical isomerism?
A.
2-Methylpropene
B.
1,1-Dichloropropene (CH3-CH=CCl2)
C.
1,2-Dichloropropene (CH3-CCl=CH-Cl)
D.
Tetrachloroethene (Cl2C=CCl2)
😑 View Answer Rough Work Error
ANSWER :
C. 1,2-Dichloropropene (CH3-CCl=CH-Cl)
12.
Which is true about cis-but-2-ene and trans-but-2-ene?
A.
They have same molecular formula and connectivity but differ in spatial arrangement
B.
They differ in carbon skeleton
C.
They have different molecular formulas
D.
They are constitutional isomers
😑 View Answer Rough Work Error
ANSWER :
A. They have same molecular formula and connectivity but differ in spatial arrangement