What happens when methane undergoes combustion in system A and B respectively? Adiabatic system System A Diathermic container System B Ans. NTA (2) | JEE(Main) 2023 | DATE : 13-04-2023 (SHIFT-2) | PAP

Question

What happens when methane undergoes combustion in system A and B respectively? Adiabatic system System A Diathermic container System B Ans. NTA (2) | JEE(Main) 2023 | DATE : 13-04-2023 (SHIFT-2) | PAPER-1 | CHEMISTRY PAGE # 7 The covalency and oxidation state oxidation state respectively of boron in [BF4]–, are

(A) 3 and 5
(B) 4 and 3
(C) 3 and 4
(D) 4 and 4

Prashant Kotian · Accepted Answer

Correct answer: B. Covalency = 4 For oxidation number x + 4(–1) = –1  x = 3

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