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Standard X
Chemistry
Properties of Ionic Compound
When hydrogen...
Question

When hydrogen is passed over a black solid compound A, the products are 'a colorless liquid' and 'a reddish-brown metal B .’ Substance B is divided into two parts, each placed in separate test tubes.
Dilute HCl is added to one part of substance B and dilute HNO3 to the other.​

Give two tests for the colourless liquid formed in the experiment.​

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Solution

Two tests for colourless liquid (water):​ ​
Litmus paper test: ​
Since water is a colourless and neutral liquid, it will have pH around 7.
It does not show colour change with both blue as well as red litmus paper.​ ​

Copper sulphate test: ​
Anhydrous copper sulphate (CuSO4) is white while hydrated copper sulphate (CuSO4.5H2O) is blue. ​ ​

On adding the colorless liquid produced in this experiment, it turns blue proving that the liquid is water.​ ​

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Q.

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.

Q. Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.

(a) What type of substance is B ?
(b) What type of substance is C ?
(c) Name the gas (i) D, and (ii) E ?
(d) State one characteristic property of gas D.
(e) Write one test to identify gas .E
Q. When hydrogen is passed over a black solid compound A, the products are 'a colorless liquid' and 'a reddish-brown metal B.’ Substance B is divided into two parts, each placed in separate test tubes.
Dilute HCl is added to one part of substance B and dilute HNO3 to the other.​
Name the substances A and B.​
Q. 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 separate test tubes.
Dilute HCl is added to one part of substance B and dilute HNO3 to the other. What happens to substance A when it reacts with hydrogen ? Give reasons for your answer.
Q. When hydrogen is passed over a black solid compound A, the products are 'a colorless liquid' and 'a reddish-brown metal B .’ Substance B is divided into two parts, each placed in separate test tubes.
Dilute HCl is added to one part of substance B and dilute HNO3 to the other.​

Write an equation for the reaction between hydrogen and compound A.​
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Properties of Ionic Compound
Standard X Chemistry
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