Identify A, B, C, D and E.  A while substance A reacts with dilute `H_2SO_4` to produce a colourless
Channel: Doubtnut
Date: 2020-07-26

Identify A, B, C, D and E.  A while substance A reacts with dilute `H_2SO_4` to produce a colourless gas B and a colourless solution C. The reaction between B and acidified `K_2Cr_2O_7` solution produces a green solution and slightly coloured precipitate D. The substance D burns in air to produce a gas E which reacts with B to yield D and a colourless liquid. Anhydrous copper sulphate is turned blue on adiition of this colourless liquid. Addition of aqueous `NH_3` or `NaOH` to C produces first a precipitate