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In which of the following equations the ...

In which of the following equations the value of delta H represents the ionisation energy of Ba?

A

`Ba(s) rarr Ba^+(g)+e`

B

`Ba(g)rarr Ba^(+2)(g) + 2e`

C

`Ba(g) rarr Ba^+(g)+e`

D

`Ba(g)+e rarr Ba^-(g)`

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The correct Answer is:
C
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