When hydrogen is passed over a black solid compound A , the products a

1.	When hydrogen is passed over a black solid compound A , the products are 'a colourless liquid' and 'a reddish brown metal B.' Substance B is divided into two parts, each placed in seperate test tubes. Dilute HCI is added to one part of substance B and dilute HNO3 to the other. (a) Name the substances A and B. (b) Give two tests for the colourless liquid formed in the experiment. (c) What happens to substance A when it reacts with hydrogen ? Give reasons for your answer. (d) Write an equation for the reaction between hydrogen and substance A. (e) Is there any reaction between substance B and silute hydrochloric acid ? Give reasons for your answer.
Answer» When hydrogen is passed over a black solid compound A , the products are 'a colourless liquid' and 'a reddish brown metal B.' Substance B is divided into two parts, each placed in seperate test tubes. Dilute HCI is added to one part of substance B and dilute $H N O_{3}$ to the other. (a) Name the substances A and B. (b) Give two tests for the colourless liquid formed in the experiment. (c) What happens to substance A when it reacts with hydrogen ? Give reasons for your answer. (d) Write an equation for the reaction between hydrogen and substance A. (e) Is there any reaction between substance B and silute hydrochloric acid ? Give reasons for your answer.

When hydrogen is passed over a black solid compound A , the products are 'a colourless liquid' and 'a reddish brown metal B.' Substance B is divided into two parts, each placed in seperate test tubes. Dilute HCI is added to one part of substance B and dilute HNO3 to the other. (a) Name the substances A and B. (b) Give two tests for the colourless liquid formed in the experiment. (c) What happens to substance A when it reacts with hydrogen ? Give reasons for your answer. (d) Write an equation for the reaction between hydrogen and substance A. (e) Is there any reaction between substance B and silute hydrochloric acid ? Give reasons for your answer.

Answer»

When hydrogen is passed over a black solid compound A , the products are 'a colourless liquid' and 'a reddish brown metal B.'

Substance B is divided into two parts, each placed in seperate test tubes.

Dilute HCI is added to one part of substance B and dilute $H N O_{3}$ to the other.

(a) Name the substances A and B.

(b) Give two tests for the colourless liquid formed in the experiment.

(d) Write an equation for the reaction between hydrogen and substance A.

(e) Is there any reaction between substance B and silute hydrochloric acid ? Give reasons for your answer.