Sodium extract is heated with concentrated HNO3 before testing for halogens because :

Question

Sodium extract is heated with concentrated HNO3 before testing for halogens because : (A) Silver halides are totally insoluble in nitric acid. (B) Ag2S and AgCN are soluble in acidic medium. (C) S2- and CN-, if present, are decomposed by conc. HNO3 and hence do not interfere in the test. (D) Ag reacts faster with halides in acidic medium.

Tardigrade Admin · Accepted Answer

S-2 and CN- ions if present are decomposed by conc. HNO3 and hence do not interfere in the test.

Q. Sodium extract is heated with concentrated $HNO X_{3}$ before testing for halogens because :

Silver halides are totally insoluble in nitric acid.

$Ag X_{2} S$ and $A g CN$ are soluble in acidic medium.

$S X^{2 -}$ and $CN X^{-}$ , if present, are decomposed by conc. $HNO X_{3}$ and hence do not interfere in the test.

Ag reacts faster with halides in acidic medium.

$S^{- 2}$ and $C N^{-}$ ions if present are decomposed by conc. $H N O_{3}$ and hence do not interfere in the test.

Q. Sodium extract is heated with concentrated HNOX3​ before testing for halogens because :

Silver halides are totally insoluble in nitric acid.

AgX2​S and AgCN are soluble in acidic medium.

SX2− and CNX−, if present, are decomposed by conc. HNOX3​ and hence do not interfere in the test.

Ag reacts faster with halides in acidic medium.

S−2 and CN− ions if present are decomposed by conc. HNO3​ and hence do not interfere in the test.

Q. Sodium extract is heated with concentrated $HNO X_{3}$ before testing for halogens because :

$Ag X_{2} S$ and $A g CN$ are soluble in acidic medium.

$S X^{2 -}$ and $CN X^{-}$ , if present, are decomposed by conc. $HNO X_{3}$ and hence do not interfere in the test.

$S^{- 2}$ and $C N^{-}$ ions if present are decomposed by conc. $H N O_{3}$ and hence do not interfere in the test.