MHT CET20249 May 2024Morning ShiftChemistryRedox ReactionsActual
What is the value of x and y in order to balance following redox reaction? xCuO + yNH ₃ xCu + N ₂+ xH ₂ O
Options
- Ax =2, y =1
- Bx =1, y =2
- Cx=2, y=3
- Dx=2, y=3
Correct answer
C. x=2, y=3
Step-by-step solution
Reaction: x CuO +y NH ₃ x Cu + N ₂+x H ₂ O . Assign oxidation states: - Cu in CuO: +2 , reduced to 0 in Cu . - N in NH ₃:-3 , oxidized to 0 in N ₂ . Write half-reactions: 1. Reduction: Cu ²⁺+2 e⁻ Cu , - x CuO contributes 2 x electrons. 2. Oxidation: 2 NH ₃ ~N ₂+6 e⁻ , - Each y NH ₃ contributes 3 y electrons. Equate total electrons: 2 x=3 y x= 3 y 2 . Trial values to balance: Let x=2: y=3 . Balanced Equation: 2 CuO +3 NH ₃ 2 Cu + N ₂+3 H ₂ O Answer: x=2, y=3 , Option 3.