Question

Which one of the following statements is correct?

• A. The elements having large negative values of electron gain enthalpy generally act as strong oxidising agents.
• B. The elements having low values of ionisation enthalpies act as strong reducing agents.
• C. The formation of $S^{2-}$ (g) from S(g) is an endothermic process
• D. All of these

Answer 1

Answer: (D)

(a) The elements having large negative values of electron gain enthalpy generally act as strong oxidising agents e.g. Halogens

(b) The elements having low values of ionisation enthalpies act as strong reducing agents e.g. Alkali metals.

(c) The formation of $S ^{2-}( g )$ from $S (g)$ is an endothermic process. $( D _{ eg } H _{1}=$ small negative value, $D _{ eg } H _{2}=$ large positive value)