The two salts are said to be isomorphous if they have same crystal structure ⎯ approximately equal
interfacial angles. The coordination number of the cation in the isomorphous crystal must be same. The isomorphous crystals have same stereochemical form and relatively same size of structural units. These crystals have similar chemical properties.
(i)Which of the following pairs of compounds are not isomorphous –
Text Solution
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(i)
Sol. ClO 3 – ⎯ sp 3 hybridised and NO 3 – ⎯ sp 2
hybridised
(ii)
Sol. Both Al 2 O 3 & Fe 2 O 3 have corrundum structure
(iii)
Sol. Existence of different crystalline form at the
different temperature ranges
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