A ‘p’-block element (E) and hydrogen form a binary cation (EHx) +, while EH3 on treatment with K2HgI4 in alkaline medium gives a precipitate of basic mercury(II)amido-iodine. Given below are first ion

Question

A ‘p’-block element (E) and hydrogen form a binary cation (EHx) +, while EH3 on treatment with K2HgI4 in alkaline medium gives a precipitate of basic mercury(II)amido-iodine. Given below are first ionisation enthalpy values (kJ mol –1) for first element each from group 13, 14, 15 and 16. Identify the correct first ionisation enthalpy value for element E.

(A) 1312
(B) 1086
(C) 1402
(D) 801

Prashant Kotian · Accepted Answer

Correct answer: C. Element E is N, the species is NH, among B, C, N and O, N has highest first ionization energy.

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