254) The ion that can not precipitated by both HCl and H2S is:
Answer is:
Cu+
Related Inorganic Chemistry MCQ with Answers
Answer is:
Decrease concentration of OH− ions
Explanation:
As NH4Cl is a strong electrolyte, it supresses the ionization of NH4OH. So, the concentration of OH− ions in the solution is decreased, but it is sufficient to precipitate the group III basic radicals because the solubility product of group III hydroxides is lower than group IV, V and VI hydroxides.