Which one of the following allotropc forms of carbon is isomorphous with crystalline silicon?
A
Graphite
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B
Coal
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C
Coke
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D
Diamond
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Solution
The correct option is D Diamond In crystallography, crystals are described as isomorphous if they are closely similar in shape.
Crystalline silicon
Diamond and crystalline silicon are isomorphous because they both have three dimensional tetrahedral structure.