A similarity between optical and geometrical isomerism is that

(a) each forms equal number of isomers for a given compound

(b) if in a compound one is present then so is the other

(c) both are included in stereoisomerism

(d) they have no similarity.

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(c) Stereoisomerism involve those isomers which contain same ligands in their co – ordination spheres but differ in the arrangement of these ligands in space. Stereoisomerism is of two type geomerical isomerism and optical isomerism. In geometrical isomerism ligands occupy different positions around the central metal atom or ion.
NOTE : In optical isomerism isomers have same formula but differ in their ability to rotate directions of the plane of polarized light.

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Navjyot Kalra
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