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Question

What conclusions can be drawn from the following reactions?
H2+4.5eVH+HH+13.6eVp++e

A
It is more difficult to break up an H2 molecule than it is to break up a hydrogen atom
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B
It is easier to break up an H2 molecule than it to break up a hydrogen atom
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C
The average energy of formation of H and p+ are the same
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D
Electron and proton attraction in an H2 molecule as well as an H atom are the same
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Solution

The correct option is B It is easier to break up an H2 molecule than it to break up a hydrogen atom
The energy required to break up the hydrogen atom is greater than that required to break up the H2 molecule, as the electron in H atom is held by strong forces of attraction.

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