Extracting Metals in the Middle of Activity Series

Q. Which metal is used in thermite process?

1. Cobalt
2. Aluminum
3. Sodium
4. Carbon

Q.

In the extraction of metallic zinc from zinc oxide, the reducing agent used is__.

Q.

In the extraction of metallic zinc from zinc oxide, the reducing agent used is __.

Q.

In the extraction of metallic zinc from zinc oxide, the reducing agent used is __.

Q. Carbon can be used to reduce aluminium ores.

1. True
2. False

Q. In the extraction of metallic zinc from zinc oxide, the reducing agent used is __.

1. zinc
2. carbon
3. oxygen
4. hydrogen

Q. In the extraction of metallic zinc from zinc oxide, the reducing agent used is______.

1. chlorine
2. carbon
3. fluorine
4. hydrogen

Q. Carbon is used for reduction of some metal oxides.

1. True
2. False

Q. Which of the following options can be used as a reducing agent in smelting?

1. Coke
2. Carbon monoxide
3. Carbon
4. All of the above.

Q.

From which of the following ores, metals cannot be extracted using calcination process?

1. ${\mathrm{CaCO}}_3$

2. ${\mathrm{Al}}_2{O}_3.2H_{2}O$

3. ${\mathrm{CaCO}}_3.\mathrm{Ca}(\mathrm{OH}{)}_2$

4. $\mathrm{ZnS}$

Q. The reaction of iron oxide with aluminium is used to join railway tracks or cracked machine parts. This is because:

1. this displacement reaction is highly endothermic.
2. this displacement reaction is highly exothermic.
3. this combination reaction is highly endothermic.
4. this combination reaction is highly exothermic.

Q. Which of the following metal is reacted with iron oxide in thermite process?

1. $\text{Cu}$
2. $\text{Co}$
3. $\text{Al}$
4. $\text{Na}$