In the complex, CoCl3. 3NH3, the secondary valency of the central metal is satisfied by
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a
Two chloride ions
b
Three chloride ions and three ammonia molecules
c
Three chloride ions
d
Three ammonia molecules
answer is B.
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Detailed Solution
According to Werner's theory, primary valency of a metal is satisfied by negative ions only.Werner formula …CoCl3. 3NH3Modern formula . . .Co(NH3)3Cl3Three chloride ions satisfy both primary and secondary valency. Three ammonia molecules satisfy secondary valency only.