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STD 11 - 5. Thermodynamics and thermochemistry — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 5. Thermodynamics and thermochemistry4 Marks
MCQ
The process that is $NOT$ endothermic in nature is :-
  • A
    $Ar _{( g )}+ e ^{-} \rightarrow Ar _{( g )}^{-}$
  • ✓
    $H _{( g )}+ e ^{-} \rightarrow H _{( g )}^{-}$
  • C
    $Na _{( g )} \rightarrow Na _{( g )}^{+}+ e ^{-}$
  • D
    $O _{( g )}^{-}+ e ^{-} \rightarrow O _{( g )}^{2-}$
✓

Answer

Correct option: B.
$H _{( g )}+ e ^{-} \rightarrow H _{( g )}^{-}$
b
$H _{( g )}+ e ^{-} \rightarrow H ^{-} \quad$ is exothermic rest of all endothermic process.

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