Duration: 4:30

8 views

0

In the separation of \( \mathrm{Cu}^{2+} \) and \( \mathrm{Cd}^{2+} \) in II group qualitative analysis of cations tetrammine copper (II) sulphate and tetrammine cadmium (II) sulphate react with \( \mathrm{KCN} \) to form the corresponding cyano complexes. Which one of the following pairs of the complexes and their relative stability enables the separation of \( \mathrm{Cu}^{2+} \) and \( \mathrm{Cd}^{2+} \) ?
(a) \( \mathrm{K}_{3}\left[\mathrm{Cu}(\mathrm{CN})_{4}\right] \) is perfect and \( \mathrm{K}_{2}\left[\mathrm{Cd}(\mathrm{CN})_{4}\right] \) is inperfect complex
(b) \( \mathrm{K}_{3}\left[\mathrm{Cu}(\mathrm{CN})_{4}\right] \) and \( \mathrm{K}_{2}\left[\mathrm{Cd}(\mathrm{CN})_{4}\right] \) is perfect complex
(c) \( \mathrm{K}_{2}\left[\mathrm{Cu}(\mathrm{CN})_{4}\right] \) inperfect and \( \mathrm{K}_{2}\left[\mathrm{Cd}(\mathrm{CN})_{4}\right] \) perfect complex
(d) \( \mathrm{K}_{3}\left[\mathrm{Cu}(\mathrm{CN})_{4}\right] \) inperfect and \( \mathrm{K}_{2}\left[\mathrm{Cd}(\mathrm{CN})_{4}\right] \) is perfect complex
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live