NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321132
Though coke can be used as reducing agent for the extraction of \(\mathrm{\mathrm{Cr}}\) from \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{3}}\) at high temperature, it is not practically used. This is because
1 The process is not economical
2 Amount of coke required is very large
3 Chromium carbide is formed
4 Chromium obtained contains more impurity
Explanation:
Chromium forms carbides when it combines with chromium at high temperature.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321133
During smelting an additional substance is added which combines with impurities to form a fusible product. It is known as
1 Slag
2 Mud
3 Gangue
4 Flux
Explanation:
Flux is added which combines with impurities to form slag.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321134
Silica is a/an
1 acidic flux only
2 gangue only
3 basic flux only
4 Both gangue and acidic flux
Explanation:
When \(\mathrm{SiO}_{2}\) (silica) is present as earthly impurity in an ore, it is called gangue and when it is added to remove basic impurities like \(\mathrm{CaO}, \mathrm{FeO}\), etc; it is called an acidic flux.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321135
Specific gravity of slag is
1 Always higher than molten metal
2 Always less than molten metal
3 Same as molten metal
4 None of these
Explanation:
Specific gravity of slag is always less than molten metal.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321132
Though coke can be used as reducing agent for the extraction of \(\mathrm{\mathrm{Cr}}\) from \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{3}}\) at high temperature, it is not practically used. This is because
1 The process is not economical
2 Amount of coke required is very large
3 Chromium carbide is formed
4 Chromium obtained contains more impurity
Explanation:
Chromium forms carbides when it combines with chromium at high temperature.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321133
During smelting an additional substance is added which combines with impurities to form a fusible product. It is known as
1 Slag
2 Mud
3 Gangue
4 Flux
Explanation:
Flux is added which combines with impurities to form slag.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321134
Silica is a/an
1 acidic flux only
2 gangue only
3 basic flux only
4 Both gangue and acidic flux
Explanation:
When \(\mathrm{SiO}_{2}\) (silica) is present as earthly impurity in an ore, it is called gangue and when it is added to remove basic impurities like \(\mathrm{CaO}, \mathrm{FeO}\), etc; it is called an acidic flux.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321135
Specific gravity of slag is
1 Always higher than molten metal
2 Always less than molten metal
3 Same as molten metal
4 None of these
Explanation:
Specific gravity of slag is always less than molten metal.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321132
Though coke can be used as reducing agent for the extraction of \(\mathrm{\mathrm{Cr}}\) from \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{3}}\) at high temperature, it is not practically used. This is because
1 The process is not economical
2 Amount of coke required is very large
3 Chromium carbide is formed
4 Chromium obtained contains more impurity
Explanation:
Chromium forms carbides when it combines with chromium at high temperature.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321133
During smelting an additional substance is added which combines with impurities to form a fusible product. It is known as
1 Slag
2 Mud
3 Gangue
4 Flux
Explanation:
Flux is added which combines with impurities to form slag.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321134
Silica is a/an
1 acidic flux only
2 gangue only
3 basic flux only
4 Both gangue and acidic flux
Explanation:
When \(\mathrm{SiO}_{2}\) (silica) is present as earthly impurity in an ore, it is called gangue and when it is added to remove basic impurities like \(\mathrm{CaO}, \mathrm{FeO}\), etc; it is called an acidic flux.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321135
Specific gravity of slag is
1 Always higher than molten metal
2 Always less than molten metal
3 Same as molten metal
4 None of these
Explanation:
Specific gravity of slag is always less than molten metal.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321132
Though coke can be used as reducing agent for the extraction of \(\mathrm{\mathrm{Cr}}\) from \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{3}}\) at high temperature, it is not practically used. This is because
1 The process is not economical
2 Amount of coke required is very large
3 Chromium carbide is formed
4 Chromium obtained contains more impurity
Explanation:
Chromium forms carbides when it combines with chromium at high temperature.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321133
During smelting an additional substance is added which combines with impurities to form a fusible product. It is known as
1 Slag
2 Mud
3 Gangue
4 Flux
Explanation:
Flux is added which combines with impurities to form slag.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321134
Silica is a/an
1 acidic flux only
2 gangue only
3 basic flux only
4 Both gangue and acidic flux
Explanation:
When \(\mathrm{SiO}_{2}\) (silica) is present as earthly impurity in an ore, it is called gangue and when it is added to remove basic impurities like \(\mathrm{CaO}, \mathrm{FeO}\), etc; it is called an acidic flux.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
321135
Specific gravity of slag is
1 Always higher than molten metal
2 Always less than molten metal
3 Same as molten metal
4 None of these
Explanation:
Specific gravity of slag is always less than molten metal.