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GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25811 Which of the following ore is used for industrial extraction of aluminium in India

1 Corundum

2 Keolin

3 Cryolite

4 Bauxite

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25812 Bauxite is an oxide ore of

1 Barium

2 Boron

3 Bismuth

4 Aluminium

Explanation:

The members of Group $13$ elements are: Boron, Alumunium, Gallium, Indium and Thallium
Generally, the oxidation state of members of boron family is $+ 3$ and $+ 1$ .
On moving down the group, the tendency to form $+ 1$ ion increases due to the inert pair effect.
Every element of the Boron family reacts with oxygen at high temperature forming trioxides, $M_{2} O_{3}$ .
$4 M (s) + 6 O_{2} (g) \to 2 M_{2} O_{3} (s)$
Bauxite is an oxide mineral of aluminium.
Chemical formula $A l_{2} O_{3} \cdot 2 H_{2} O$ .
Hence Bauxite is an oxide mineral of Aluminium.

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25813 Cryolite is

1 Magnesium silicate

2 Sodium borofluoride

3 Sodium aluminium fluoride

4 Magnesium silicate

Explanation:

(c) $N a_{3} A l F_{6}$ Sodium hexafluoro aluminate $(I I I)$

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25815 Main ore of aluminium is

1 Bauxite

2 Corundum

3 Cryolite

4 Magnetite

Explanation:

Aluminium is the most abundant metal in the earth's crust. It does not occur in the free state as it is a reactive metal.
Ores of aluminium are: Bauxite, Cryolite and Corundum. Bauxite is hydrated aluminium oxide having the formula $A l_{2} O_{3} \cdot 2 H_{2} O$

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25811 Which of the following ore is used for industrial extraction of aluminium in India

1 Corundum

2 Keolin

3 Cryolite

4 Bauxite

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25812 Bauxite is an oxide ore of

1 Barium

2 Boron

3 Bismuth

4 Aluminium

Explanation:

The members of Group $13$ elements are: Boron, Alumunium, Gallium, Indium and Thallium
Generally, the oxidation state of members of boron family is $+ 3$ and $+ 1$ .
On moving down the group, the tendency to form $+ 1$ ion increases due to the inert pair effect.
Every element of the Boron family reacts with oxygen at high temperature forming trioxides, $M_{2} O_{3}$ .
$4 M (s) + 6 O_{2} (g) \to 2 M_{2} O_{3} (s)$
Bauxite is an oxide mineral of aluminium.
Chemical formula $A l_{2} O_{3} \cdot 2 H_{2} O$ .
Hence Bauxite is an oxide mineral of Aluminium.

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25813 Cryolite is

1 Magnesium silicate

2 Sodium borofluoride

3 Sodium aluminium fluoride

4 Magnesium silicate

Explanation:

(c) $N a_{3} A l F_{6}$ Sodium hexafluoro aluminate $(I I I)$

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25815 Main ore of aluminium is

1 Bauxite

2 Corundum

3 Cryolite

4 Magnetite

Explanation:

Aluminium is the most abundant metal in the earth's crust. It does not occur in the free state as it is a reactive metal.
Ores of aluminium are: Bauxite, Cryolite and Corundum. Bauxite is hydrated aluminium oxide having the formula $A l_{2} O_{3} \cdot 2 H_{2} O$

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25811 Which of the following ore is used for industrial extraction of aluminium in India

1 Corundum

2 Keolin

3 Cryolite

4 Bauxite

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25812 Bauxite is an oxide ore of

1 Barium

2 Boron

3 Bismuth

4 Aluminium

Explanation:

The members of Group $13$ elements are: Boron, Alumunium, Gallium, Indium and Thallium
Generally, the oxidation state of members of boron family is $+ 3$ and $+ 1$ .
On moving down the group, the tendency to form $+ 1$ ion increases due to the inert pair effect.
Every element of the Boron family reacts with oxygen at high temperature forming trioxides, $M_{2} O_{3}$ .
$4 M (s) + 6 O_{2} (g) \to 2 M_{2} O_{3} (s)$
Bauxite is an oxide mineral of aluminium.
Chemical formula $A l_{2} O_{3} \cdot 2 H_{2} O$ .
Hence Bauxite is an oxide mineral of Aluminium.

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25813 Cryolite is

1 Magnesium silicate

2 Sodium borofluoride

3 Sodium aluminium fluoride

4 Magnesium silicate

Explanation:

(c) $N a_{3} A l F_{6}$ Sodium hexafluoro aluminate $(I I I)$

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25815 Main ore of aluminium is

1 Bauxite

2 Corundum

3 Cryolite

4 Magnetite

Explanation:

Aluminium is the most abundant metal in the earth's crust. It does not occur in the free state as it is a reactive metal.
Ores of aluminium are: Bauxite, Cryolite and Corundum. Bauxite is hydrated aluminium oxide having the formula $A l_{2} O_{3} \cdot 2 H_{2} O$

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25811 Which of the following ore is used for industrial extraction of aluminium in India

1 Corundum

2 Keolin

3 Cryolite

4 Bauxite

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25812 Bauxite is an oxide ore of

1 Barium

2 Boron

3 Bismuth

4 Aluminium

Explanation:

The members of Group $13$ elements are: Boron, Alumunium, Gallium, Indium and Thallium
Generally, the oxidation state of members of boron family is $+ 3$ and $+ 1$ .
On moving down the group, the tendency to form $+ 1$ ion increases due to the inert pair effect.
Every element of the Boron family reacts with oxygen at high temperature forming trioxides, $M_{2} O_{3}$ .
$4 M (s) + 6 O_{2} (g) \to 2 M_{2} O_{3} (s)$
Bauxite is an oxide mineral of aluminium.
Chemical formula $A l_{2} O_{3} \cdot 2 H_{2} O$ .
Hence Bauxite is an oxide mineral of Aluminium.

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25813 Cryolite is

1 Magnesium silicate

2 Sodium borofluoride

3 Sodium aluminium fluoride

4 Magnesium silicate

Explanation:

(c) $N a_{3} A l F_{6}$ Sodium hexafluoro aluminate $(I I I)$

GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

25815 Main ore of aluminium is

1 Bauxite

2 Corundum

3 Cryolite

4 Magnetite

Explanation:

Aluminium is the most abundant metal in the earth's crust. It does not occur in the free state as it is a reactive metal.
Ores of aluminium are: Bauxite, Cryolite and Corundum. Bauxite is hydrated aluminium oxide having the formula $A l_{2} O_{3} \cdot 2 H_{2} O$

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