Hg_2Cl_2 ionises as .... and cation has .... unpaired electron(s)

JEE Advanced Chemistry question

ionises as .... and cation has .... unpaired electron(s)

(A) and , two
(B) and , two
(C) and , one
(D) and , noCorrect

Answer: (D)

Solution

Calomel ionises to give the dimeric mercurous cation (not two separate ions), in which the two mercury centres are joined by a covalent Hg–Hg bond. Each mercury

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Question ID VK-159703