Reduction of ...

Reduction of Oxides

Trending Questions

Q. Which of the following is not true for thermit reaction?

It is a displacement reaction
It is highly exothermic reaction
The reaction involved is:
$A l_{2} O_{3} (s) + F e (s) \to A l (l) + F e_{2} O_{3} (s) + H e a t$
The reaction is used to join railway track

View Solution

Give an example of trivalent metal extracted by electrolytic reduction

View Solution

Q. Which of the following is used as a reducing agent in the process of extracting zinc from zinc oxide?

Coke
Water
Electricity
Hydrogen

View Solution

Complete the following

$2 A l_{2} O_{3} + 3 C \to 4 A + 3 B$ . A & B are as follows.

Al, CO₂
CO₂, Al
CO, Al
Al, CO

View Solution

Identify A and B in the given reaction:
$2 {Al}_{2} O_{3} (s) + 3 C(s) \to 4A + 3B$ .

Al, CO
CO, Al
Al, $C O_{2}$
$C O_{2}, A l$

View Solution

Complete the following

$2 A l_{2} O_{3} + 3 C \to 4 A + 3 B$ . A & B are as follows.

Al, CO₂
Al, CO
CO, Al
CO₂, Al

View Solution

Complete the following

$2 A l_{2} O_{3} + 3 C \to 4 A + 3 B$ . A & B are as follows.

Al, CO
CO, Al
Al, CO₂
CO₂, Al

View Solution

Reduction to free metal: some of the methods commonly used to get free metal from the concentrates ore are below.

Smelting: The process of extracting a metal in the state of fusions is called smelting. In this process, the ore is mixed with carbon and heated in a suitable furnace

Electrolytic reduction process: This process is used in the extraction of the alkali and alkaline earth metals, zinc and aluminium.

Self-reduction process: The sulphide ores of less electropositive metals like Hg, Pb, Cu etc., are heated in the air so as to convert part of the ore into oxide or sulphate which then reacts with the remaining sulphide ore to give the metal.

In the metallurgical extraction of zinc from ZnO, the reducing agent used is :

$S O_{2}$
$C O$
$C O_{2}$
$N O$

View Solution

Q. Which of the following metals are extracted by reducing their metal oxides using carbon?

Calcium
Iron
Magnesium
Lead

View Solution

Q. Match the following reactions with the process involved during the extraction of moderately reactive metals.

Reduction with carbon
Calcination
Roasting

View Solution

Q. Which of the following reaction is not involved in thermite process?

$3 M n_{3} O_{4} + 8 A l \to 9 M n + 4 A l_{2} O_{3}$
$C r_{2} O_{3} + 2 A l \to A l_{2} O_{3} + 2 C r$
$2 F e + A l_{2} O_{3} \to 2 A l + F e_{2} O_{3}$
$B_{2} O_{3} + 2 A l \to 2 B + A l_{2} O_{3}$

View Solution

Concentrated metal ores are converted to their oxides for extracting metal from ore.

True
False

View Solution

Q. The reducing agent used in the reduction of zinc oxide to zinc is:

Pure zinc
Carbon monoxide
Coke
Carbon dioxide

View Solution