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Bond dissociation enthalpy of E—H (E = element) bonds are given below. Which of the compounds will act as the strongest reducing agent?

Compound∆diss (E—H)/kJ mol–1 NH3389 PH3322 AsH3297 SbH3255

(i) NH3

(ii) PH3

(iii) AsH3

(iv) SbH3

 

Correct Answer: (iv) SbH3

Explanation: SbH3 is the compound that will act as the strongest reducing agent.