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Identify D When a white crystalline co...

Identify D
When a white crystalline compound X is heated with `K_2Cr_2O_7` and concentrated `H_2SO_4`, a reddish brown gas A is evolved. On passing A into caustic soda solution a yellow coloured solution of B is obtained Neutralising the solution of B with acetic acid and on subsequent addition of lead acetate, a yellow precipitate C is obtained. When X is heated with NaOH solution a colourless gas is evolved and on passing this gas into `K_2Hgl_4` solution a reddish brown precipitate D is formed.

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To solve the problem step by step, we need to analyze the reactions described in the question and identify the compound D. ### Step 1: Identify Compound X The question states that a white crystalline compound X is heated with potassium dichromate (K2Cr2O7) and concentrated sulfuric acid (H2SO4). A reddish-brown gas A is evolved. **Hint:** Think about common white crystalline compounds that can react with potassium dichromate and sulfuric acid to produce gas. ### Step 2: Identify Gas A ...
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