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IP1 and IP2 of Mg are 178 and 348 K cal ...

`IP_1` and `IP_2` of Mg are 178 and 348 K cal `mol^(-1)`. The enthalpy required for the reaction `Mg rarr Mg^(2+) + 2e^-` is

A

(+170 kcal`mol^(-1)`)

B

(+526 kcal`mol^(-1)`)

C

(-170 kcal`mol^(-1)`)

D

(-526 kcal`mol^(-1)`)

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The correct Answer is:
B
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