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Q.

Energy required to dissociate 4 g of gaseous hydrogen into free gaseous atoms in 208 kcal at $25^{0} C .$
The bond energy of H - H bond will be

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a

104 kcal

b

10.4 kcal

c

1040 kcal

d

1.04 kcal

answer is A.

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Detailed Solution

Bond energy = $\frac{208}{2} = 104 kcal$

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