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Q.

The order of reactivity of different hydrogens are

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a

Atomic hydrogen > Nascent hydrogen > ordinary hydrogen.

b

Nascent hydrogen > Atomic hydrogen > Ordinary hydrogen

c

Ordinary hydrogen > Nascent hydrogen > Atomic hydrogen

d

Atomic hydrogen > Ordinary hydrogen > Nascent hydrogen

answer is A.

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Detailed Solution

t1/2 of Atomic hydrogen is only 0.3 sec. so most reactive. Nascent Hydrogen is formed during reaction more reactive than ordinary hydrogen. One of the evidence is atomic torch which is used to generate heat, used for welding purpose.

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