A coloured compound (A) reacts with dilute H_(2)SO_(4) to produce a colourless gas (B) and colourless solution (C). The reaction between (B) and the acidified K_(2)Cr_(2)O_(7) solution produces a green solution and a slightly yellowish precipitate (D). the substance (D) burns in air to produce a gas (E) which also cann change the colour of K_(2)Cr_(2)O_(7) solution. Q. When colourless solution (C) reacts with Pb_(3)O_(4)//H^(+), it acquries a violet red colour due to formation of :

A coloured compound (A) reacts with dilute H_(2)SO_(4) to produce a co

1.	A coloured compound (A) reacts with dilute H_(2)SO_(4) to produce a colourless gas (B) and colourless solution (C). The reaction between (B) and the acidified K_(2)Cr_(2)O_(7) solution produces a green solution and a slightly yellowish precipitate (D). the substance (D) burns in air to produce a gas (E) which also cann change the colour of K_(2)Cr_(2)O_(7) solution. Q. When colourless solution (C) reacts with Pb_(3)O_(4)//H^(+), it acquries a violet red colour due to formation of :
Answer» `MnO_(4)^(-)` `PbO_(2)` `I_(3)^(-)` `[Ni(en)_(3)]S_(2)O_(3)` SOLUTION :