How many of the following reactions proceed with the absorption of energy
$\displaylines Cl (g) \to C l^{-} (g); O^{- 2} (g) \to O^{-} (g); N (g) \to N^{-} (g)$

$\displaylines M g (g) \to M g^{+ 2} (g) C l^{-} (g) \to C l^{- 2} (g) B e (g) \to B e^{-} (g)$

Question

How many of the following reactions proceed with the absorption of energy

$\displaylines Cl (g) \to C l^{-} (g); O^{- 2} (g) \to O^{-} (g); N (g) \to N^{-} (g)$

$\displaylines M g (g) \to M g^{+ 2} (g) C l^{-} (g) \to C l^{- 2} (g) B e (g) \to B e^{-} (g)$

TestHub · Accepted Answer

( Δ H E . G . E ​ ) for Be, N, Mg and all inert gases for addition of first electron is positive. Addition of second electron to any atom( addition of an electron to an anion) is always an endothermic process.

Chemistry - PERIODIC TABLE Question with Solution | TestHub

Doubts & Discussion

JEE Main (2028)