Transitional elements exhibit variable valencies because they release – McqOptions

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1.	Transitional elements exhibit variable valencies because they release electrons from the following orbits [MP PET/PMT 1988; MP PET 1989;UPSEAT 2001]
A.	ns orbit
B.	ns and np orbits
C.	(n - 1)d and ns orbits
D.	(n - 1)d orbit
Answer» D. (n - 1)d orbit

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