In order to obtain one tonne of aluminum, the following inputs are required: four tonnes of bauxite, $150 K g$ of Sodium hydroxide, and $600 K g$ of graphite. The aluminum compound in bauxite is Aluminum oxide and the main impurity is iron $(I I I)$ oxide. Aluminum is obtained by the electrolysis of Aluminum oxide dissolved in cryolite.
In construction work, why is the alloy of aluminum, duralumin used rather than pure aluminum?

Open in App

Solution

Duralumin is an alloy of Aluminium( $A l$ ).
Duralumin consists of Aluminium, Copper( $C u$ ), Manganese( $M n$ ), and Magnesium( $M g$ ).
Duralumin is used in construction work instead of aluminium because of its characteristic properties.
It has a low melting point so it can be easily cast into different shapes.
It has poor conductivity and is lightweight compared to Aluminum.
Hence, duralumin's characteristic properties compared to aluminium like lightweight, low melting point, and poor conductivity makes it used in construction work rather than pure aluminium.

Suggest Corrections

Similar questions

Q. In order to obtain one tonne of aluminium, the following inputs are required:
4 tonnes of bauxite, 150 kg of sodium hydroxide and 600 kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (III) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(a) When bauxite is treated with sodium hydroxide solution, what happens to:
(i) the aluminium oxide?
(ii) the iron (III) oxide?
(b) (i) Name the process used for the purification of bauxite.
(ii) Write the equation to show the action of heat on aluminium hydroxide.
(c) (i) Write the formula of cryolite.
(ii) Write down the word which correctly completes the following sentence:
"By dissolving aluminium oxide in cryolite, a __________ (conducting/non-conducting) solution is produced.
(iii) Why is so much graphite required for this electrolytic process?
(iv) Write the equation for the reaction which takes place at the cathode.
(d) In construction work, why is the alloy of aluminium, duralumin used rather than pure aluminium.

In order to obtain 1 tonner of aluminium, the following inputs are required. 4 tonnes of bauxite, 150 kg of sodium hydroxide and 600 kg of graphite. The aluminium compound in bauxite is aluminium oxide and the main impurity is Iron (III) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.

(a) When bauxite is treated with sodium hydroxide solution, what happens to:

(i) the aluminium oxide,

(ii) the iron (III) oxide?

(b) (i) Name the process used for the purification of bauxite.

(ii) Write the equation for the action of heat on aluminium hydroxide.

(ii) Write down the word which correctly completes the following sentence.By dissolving aluminium oxide in cryolite a ..........(conducting/non conducting) solution is produced.

(iii) Why is so much graphite required for the electrolytic process?

(iv) Write the equation for the reaction which takes palace at cathode.

In order to obtain $1$ tonne of aluminum, the following inputs are required: four tonnes of bauxite, $150 K g$ of sodium hydroxide, and $600 K g$ of graphite. The aluminum compound in bauxite is aluminum oxide and the main impurity is iron $(I I I)$ oxide. Aluminum is obtained by the electrolysis of aluminum oxide dissolved in cryolite.

When bauxite is treated with sodium hydroxide solution what happens to:

aluminum oxide?

Write the equation of action of heat on Aluminum Hydroxide

In order to obtain one tonne of aluminum, the following inputs are required: four tonnes of bauxite, $150 K g$ of Sodium hydroxide, and $600 K g$ of graphite. The aluminum compound in bauxite is aluminum oxide and the main impurity is iron $(I I I)$ oxide. Aluminum is obtained by the electrolysis of aluminum oxide dissolved in cryolite.

Why is so much graphite required for this electrolytic process?

Join BYJU'S Learning Program