Find the compound ' A' from the following reaction sequences.
A $\to aqua - regia B \to (1) KNO_{2} ∣ NH_{4} OH (b) AcOH$ yellow ppt

Question

Find the compound ' A' from the following reaction sequences. A aqua- regia B (1 ) KNO_2 ∣ NH_4 OH (b ) AcOH yellow ppt

Accepted Answer

Correct answer: A. (a) Compound (A ) in the given reaction sequence is likely to be CoS . CoS+ HNO_3+3 HCl Co^2+ +S ↓+ NOCl ↑ +2 Cl^-+2H_2O The above solution is neutralised with NH_4 OH. To a neutral solution of Co^2+, acetic acid and saturated solution of KNO_2 are added which results in the formation of yellow precipitate of K_3 ( Co ( NO_2 )_6 ) Co^2++7 NO_2^-+2H^++3K^+ K_3 ( Co ( NO_2 )_6 )+ NO ↑+H_2O

$Find the compound ' A' from the following reaction sequences. A \to aqua - regia B \to (1) KNO_{2} ∣ NH_{4} OH (b) AcOH yellow ppt$

Solution

More d- and f-Block Elements PYQs