Q. Which of the following statements is correct?
A) Manganese salt gives violet borax bead test in the reducing flame
B) Ferric ions give a deep green precipitate on adding potassium ferricyanide solution
C) On boiling a solution having $K^{+},\ Ca^{2 +},\ HCO_{3}^{-}$ ions, we get a precipitate of $K_{2}Ca\left( CO_{3} \right)_{2}$
D) From a mixed precipitate of AgCl and AgI, ammonia solution dissolves only AgCl
Explanation
(d)
$AgI\$is insoluble in $NH_{4}OH$ but AgCl is soluble in $NH_{4}OH$ due to the formation of $\lbrack Ag\left( NH_{3} \right)_{2}\rbrack Cl$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.