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Question

Consider the following processes and respective energy change-
M(s)M(g) .....(a)
M(s)M2+(g)+2e .....(b)
M(g)M+(g)+e .....(c)
M+(g)M2+(g)+e .....(d)
M(g)M2+(g)+2e .....(e)
Energy required to change M(s) into M+(g) is -

A
a+c+d
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B
a+c
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C
a+ec
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D
ec
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Solution

The correct option is B a+c
M(s)(a)M(g)(c)M+(g)
We can't remove electrons from the solid form. We can only remove electrons from the isolated gaseous atom.

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