Question

Some salts containing two different metallic elements give test for only one of them in solution, such salts are

• A. double salts
• B. normal salts
• C. complex salts
• D. None of these

Answer 1

Answer: (C)

complex salts

Answer 2

Some salts containing two different metallic elements give test for only one of them in solution, such salts are complex salts. For example, $K _{4}\left[ Fe ( CN )_{6}\right]$ is a complex salt. In aqueous solution, it will dissociate into $K ^{+}$ions and $\left[ Fe ( CN )_{6}\right]^{4-}$ ions. The aqueous solution of $K _{4}\left[ F e ( CN )_{6}\right]$ will give test for $K ^{+}$ions only. It will not give test for $F e ^{2+}$ ions.