Copper Test

Q.

Name a black metallic oxide that reacts with dilute HCl to give a blue solution.

Q.

(a) Dilute nitric acid is generally considered a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals?

(b) Write the equation for the reaction of dilute nitric acid and conc. nitric acid with copper.

Q. (a) Dilute nitric acid is generally considered a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals?
(b) Write the equation for the reaction of dilute nitric acid with copper. [4 MARKS]

Q. How does nitric acid react with metals? Why is $H_2$ gas not obtained as one of the products during the reaction? [5 MARKS]

Q.

Explain the following:

Dilute nitric acid is generally considered a typical acid but not so in its reaction with metals.

Q.

(a) A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when reacts with copper. Identify B. Write equation with copper.

(b) Complete the table :

$\begin{array}{cccc}\text{Name of Process}& \text{Inputs}& \text{Equation}& \text{Output}\\ & \text{Ammonia}& & \text{Nitric acid}\\ & \text{+Air}& & \end{array}$

(c) What is the property of nitric acid which allows it to react with copper.

Q. Which of the following oxide dissolves in water to form an acidic solution?

1. $N{a}_{2}O$
2. $CaO$
3. $A{l}_2{O}_3$
4. $ZnO$
5. $S{O}_3$

Q. Complete the following reaction
$\mathrm{Cu}+{\mathrm{HNO}}_3\to \mathrm{Cu}({\mathrm{NO}}_3{)}_2+H_{2}O+$

1. $N{O}_2$
2. $N{O}_3$
3. $O_2$

Q.

Metallic sulphide reacting with hydrochloric acid forms salt and ___.

1. hydrogen gas.

2. carbon dioxide gas.

3. sulphur dioxide gas.

4. hydrogen sulphide gas.

Q. Complete the following reaction
$\mathrm{Cu}+{\mathrm{HNO}}_3\to \mathrm{Cu}({\mathrm{NO}}_3{)}_2+H_{2}O+$

1. $N{O}_2$
2. $N{O}_3$
3. $O_2$

Q. _________ is liberated when acetic acid reacts with sodium metal.

1. Chloride
2. Hydrogen
3. Nitrogen
4. Oxygen