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 D is boiled with alkaline sulphite solution a compound F is formed. F can be used in (I) Iodine titrations in volumetric analysis (II) Bleaching industry to destroy excess Cl_(2) (III) Photography for 'fixing' films (IV) Iodometric titrations Choose the correct codes:

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 D is boiled with alkaline sulphite solution a compound F is formed. F can be used in (I) Iodine titrations in volumetric analysis (II) Bleaching industry to destroy excess Cl_(2) (III) Photography for 'fixing' films (IV) Iodometric titrations Choose the correct codes:
Answer» I and IV I, III and IV II and III I, II, III and IV Solution :