NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Chemistry
- Chapter
- Chemical Equilibrium
NTA Abhyas 2020 · Chemistry · Chemical Equilibrium
The equilibrium Cu^ 0 + Cu^ II ⇌ 2Cu^ I In aqueous medium at 25oC...
The equilibrium {\text{Cu}^{0} + {\text{Cu}^{\text{II}} ⇌ {\text{2Cu}^{I}
In aqueous medium at 25oC shifts towards the left in the presence of
(1) \text{C}{\textl^{-} (2) \text{C}{\textN^{-} (3) \text{SC}{\textN^{-} (4) \text{N}{{\text{O}_{3}}^{-}
In aqueous medium at 25oC shifts towards the left in the presence of
(1) \text{C}{\textl^{-} (2) \text{C}{\textN^{-} (3) \text{SC}{\textN^{-} (4) \text{N}{{\text{O}_{3}}^{-}
Options
- A1,2
- B2,3
- C1,2,3
- D2,3,4
Correct answer
C. 1,2,3
Step-by-step solution
\text{C}{\textu^{2 +} ions will react with \text{C}{\textN^{-} and \text{SC}{\textN^{-} forming and leading the reaction in the backward direction.
\text{C}{\textu^{2 +} + \text{2C}{\textN^{-} \to \text{Cu}{\left(CN\right)}_{2}
\text{CuCN} + \text{3C}{\textN^{-} \to [ \text{Cu}{\left(\text{CN}{)}_{4}\right]}^{3 -}
\text{C}{\textu^{2 +} + \text{4SC}{\textN^{-} \to [ \text{Cu}{\left(\text{SCN}{)}_{4}\right]}^{3 -}
\text{C}{\textu^{2 +} also combines with \text{CuC}{\text{l}_{2} which reacts with Cu to produce CuCl pushing the reaction in the backward direction.
\text{CuC}{\text{l}_{2} + \text{Cu} \to \text{2CuCl} ↓
\text{C}{\textu^{2 +} + \text{2C}{\textN^{-} \to \text{Cu}{\left(CN\right)}_{2}
\text{CuCN} + \text{3C}{\textN^{-} \to [ \text{Cu}{\left(\text{CN}{)}_{4}\right]}^{3 -}
\text{C}{\textu^{2 +} + \text{4SC}{\textN^{-} \to [ \text{Cu}{\left(\text{SCN}{)}_{4}\right]}^{3 -}
\text{C}{\textu^{2 +} also combines with \text{CuC}{\text{l}_{2} which reacts with Cu to produce CuCl pushing the reaction in the backward direction.
\text{CuC}{\text{l}_{2} + \text{Cu} \to \text{2CuCl} ↓