Engineering Chemistry Questions and Answers – E and Z Nomenclature of Geometric Isomers

This set of Engineering Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “E and Z Nomenclature of Geometric Isomers”.

1. What are Stereoisomers?
a) Isomers having a same molecular formula and same configuration
b) Isomers having a same molecular formula but different configuration
c) Isomers having a different molecular formula but the same configuration
d) Isomers having a different molecular formula and different configuration
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2. What are diastereomers?
a) Molecules with non-superimposable mirror images
b) Molecules with superimposable mirror images
c) Molecules which do not have non-superimposable mirror images
d) None of the mentioned
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3. Which type of compounds cannot exhibit geometrical isomerism?
a) Singly Bonded
b) Doubly Bonded
c) Triply Bonded
d) Cyclic Compounds
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4. Choose the correct option from the following.
a) A group gets priority if its atomic number is high
b) When atoms attached to a double bond have same atomic number, the first atoms are considered
c) A group gets priority if its atomic number is low
d) Lone pair gets more priority and is ranked above hydrogen
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5. In which type of projection we can get staggered and eclipsed conformations?
a) Newman Projection
b) Sawhorse Projection
c) Fischer Projection
d) Wedge Projection
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6. Assign E or Z configuration to the given compound.

a) E-configuration
b) Z-configuration
c) S-configuration
d) R-configuration
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7. Which of the following compounds have Z-configuration?
a) CH3CH3CH2>C=C<HCH3
b) HPh>C=C<COOHPh
c) H2NCl>C=C<COOHBr
d) CH3Ph>C=C<CH2CH3Br
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8. Select the incorrect option from the following.
a) Fischer projections are two dimensional representations of three dimensional molecules
b) A molecule is achiral if it cannot be superimposed on its mirror reflection
c) E and Z notations are based on Cahn, Ingold and Prelog priority system
d) Chiral molecules which are non-superimposable mirror images of each other are enantiomers
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9. The cis-trans nomenclature is not applicable when _________
a) The different groups attached to the carbon atom of double bond are same
b) Atleast one of the group attached to each carbon atom is same
c) The different groups attached to the carbon atom of double bond are not same
d) The cis-trans nomenclature is applicable for all compounds
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10. In glyceraldehydes, the complete sequence of priority is _________
a) –OH > -CH₂OH > -CHO > -H
b) –H > -CH₂OH > -CHO > -OH
c) –H > –OH > -CH₂OH > -CHO
d) –OH > CHO > -CH₂OH > -H
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Sanfoundry Global Education & Learning Series – Engineering Chemistry.

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