Q2 · CSIR NET Chemistry, June 2019
Paper: CSIR NET June 2019 · Subject: Inorganic Chemistry · Chapter: Acid and Bases · Topic: Acid and Bases – General · Marks: 2 · Difficulty: Medium
Among the following reactions, those that are feasible in liquid $\mathrm{NH_3}$ are (I) $\mathrm{KNO_3 + AgCl \rightarrow KCl + AgNO_3}$ (II) $\mathrm{NH_4Br + KNH_2 \rightarrow KBr + 2NH_3}$ (III) $\mathrm{Fe(CO)_5 + 2e^- \rightarrow [Fe(CO)_4]^{2-} + CO}$
(a)I, II and III
(b)I and II only
(c)I and III only
(d)II and III only
Answer
Answer (as printed): A
Explanation
•When aqueous solution of AgNO3 is added to an aqueous solution of KCl, white ppt of AgCl is formed. KCl+AgNO3 →AgCl + KNO3 White ppt But in liquid NH3, the direction of the reaction is reversed. AgCl + KNO3 → KCl+ AgNO3 • NH4Br + KNH2 → KBr + 2NH3 This reaction is neutralization reaction in liquid NH3 Ammonia solutions of alkali metals and alkaline earth metals are strong reducing agents. Fe(CO)5 +2e- → [Fe(CO)4]-2 + CO
Explanation as extracted from the printed page; notation may be imperfect.
Study loop for Acid and Bases