JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Deuterium resembles hydrogen in chemical properties but reacts:

(A)Slower the hydrogenCorrect
(B)Faster than hydrogen
(C)More vigorously than hydrogen
(D)Just as hydrogen

Answer: (A)

Solution

Because deuterium is twice as massive as protium, bonds to deuterium have lower zero-point vibrational energy and require more energy to break, so deuterium-involving reactions typically proceed more

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Question ID VK-137444