X is formed by the partial replacement of hydroxyl groups of a diacidic base by an acidic radical. The number of ionizable hydroxyl groups in X is _________.
A
0
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B
1
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C
2
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D
3
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Solution
The correct option is B 1 Diacidic base contains two OH− groups in a molecule. If one OH− group is replaced by an acidic radical, the number of ionizable hydroxyl radicals in the salt 'X' is one.