
(a)
Interpretation:
The possible isomers of Dichloroethene have to be given.
Concept Introduction:
ISOMERS:
The molecules which have the same molecular formula but different arrangement of atom are called as isomers. There are two types of isomers,
- Structural isomers
- Stereo isomers
Stereo isomers:
Stereo isomers are the isomers that have same molecular formula but differ in spatial arrangement of atoms. Stereo isomers can be sub divided into two groups
- Optical isomers
- Geometric isomers
Optical isomers:
Optical isomers are the mirror image of a molecule and they can be rotated by plane polarized light.
Geometric isomers:
If there is restricted rotation in a molecule there arises geometric isomerism. Geometric isomers are also known as Cis- Trans isomerism.
- If the two atoms locked in same side of the molecule then it is called as cis isomers.
- If the two atoms locked in opposite side of the molecule then it is called as trans isomers.
(b)
Interpretation:
The possible isomer of Oxalic acid has to be given.
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
The possible isomer of the 1,3-difluoro-prop-1,2-diene has to be given.
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
The possible isomers of cyclobutadiene have to be given.
Concept Introduction:
Refer to part (a).

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Chapter 9 Solutions
Student Solutions Manual to Accompany General Chemistry
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