Question

Compound X is a white crystalline solid. On strong heating, it sublimes forming two colorless gases Y and Z. These gases condense on the cooler sides of the test tube to form a white precipitate. identify X, Y, and Z.

Answer 1

Answer:

When a white crystalline compound X is heated with K

2

Cr

2

O

7

and concentrated H

2

SO

4

, a reddish brown gas A is evolved. On passing A into caustic soda solution, a yellow-colored solution B is obtained. Neutralizing 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 colorless gas is evolved and on passing this gas into K

2

HgI

4

solution, a reddish-brown precipitate D is formed.

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Answer 2

Answer:

• compound X is chlorine .  

• compound Y is  calcium chloride

• compound z Is water .

when chlorine gas reacts with lime water to form calcium oxychloride that is bleaching powder .

• 2Ca(OH)2 + 2Cl2 -------> Ca(OCl2) + CaCl2 + 2H2O

this is the balanced reaction.

Compound chlorine is a white crystalline solid. On strong heating, it sublimes forming two colorless gases calcium chloride and water. These gases condense on the cooler sides of the test tube to form a white precipitate.