MHT CET 2025 Chemistry question

Identify the correct order of thermal stability of hydrides of 16 group elements from the following

(A)
(B)
(C)Correct
(D)

Answer: (C)

Solution

Going down group 16 the size of the element increases, so the E-H bond becomes longer and weaker (bond enthalpy decreases) and the hydrides decompose more easily; thermal stability therefore decreases

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Question ID VK-100749