Reduction to the Metal
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321119 How many of the following metals are best extracted by electrolytic reduction method?
\({\mathrm{\mathrm{Fe}, \mathrm{Cu}, \mathrm{Pb}, \mathrm{Na}, \mathrm{K}, \mathrm{Sn}, \mathrm{Zn}, \mathrm{Mg}, \mathrm{Mn}, \mathrm{Cr}, \mathrm{Ca}, \mathrm{Al}}}\)

1 8
2 5
3 4
4 2
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321120 The most electropositive metals are isolated from their ores by

1 High temperature reduction with carbon
2 Self-reduction
3 Thermal decomposition
4 Electrolysis of fused ionic salts
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321121 Chemical reduction is not suitable for converting

1 Bauxite into aluminum
2 Cuprite into copper
3 Haematite into iron
4 Zinc oxide into zinc
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321122 Which of the following metal can be extracted without using reducing agent?

1 \(\mathrm{\mathrm{Sn}}\)
2 \(\mathrm{\mathrm{Pb}}\)
3 \(\mathrm{\mathrm{Fe}}\)
4 Both (1) and (2)
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321119 How many of the following metals are best extracted by electrolytic reduction method?
\({\mathrm{\mathrm{Fe}, \mathrm{Cu}, \mathrm{Pb}, \mathrm{Na}, \mathrm{K}, \mathrm{Sn}, \mathrm{Zn}, \mathrm{Mg}, \mathrm{Mn}, \mathrm{Cr}, \mathrm{Ca}, \mathrm{Al}}}\)

1 8
2 5
3 4
4 2
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321120 The most electropositive metals are isolated from their ores by

1 High temperature reduction with carbon
2 Self-reduction
3 Thermal decomposition
4 Electrolysis of fused ionic salts
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321121 Chemical reduction is not suitable for converting

1 Bauxite into aluminum
2 Cuprite into copper
3 Haematite into iron
4 Zinc oxide into zinc
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321122 Which of the following metal can be extracted without using reducing agent?

1 \(\mathrm{\mathrm{Sn}}\)
2 \(\mathrm{\mathrm{Pb}}\)
3 \(\mathrm{\mathrm{Fe}}\)
4 Both (1) and (2)
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321119 How many of the following metals are best extracted by electrolytic reduction method?
\({\mathrm{\mathrm{Fe}, \mathrm{Cu}, \mathrm{Pb}, \mathrm{Na}, \mathrm{K}, \mathrm{Sn}, \mathrm{Zn}, \mathrm{Mg}, \mathrm{Mn}, \mathrm{Cr}, \mathrm{Ca}, \mathrm{Al}}}\)

1 8
2 5
3 4
4 2
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321120 The most electropositive metals are isolated from their ores by

1 High temperature reduction with carbon
2 Self-reduction
3 Thermal decomposition
4 Electrolysis of fused ionic salts
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321121 Chemical reduction is not suitable for converting

1 Bauxite into aluminum
2 Cuprite into copper
3 Haematite into iron
4 Zinc oxide into zinc
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321122 Which of the following metal can be extracted without using reducing agent?

1 \(\mathrm{\mathrm{Sn}}\)
2 \(\mathrm{\mathrm{Pb}}\)
3 \(\mathrm{\mathrm{Fe}}\)
4 Both (1) and (2)
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321119 How many of the following metals are best extracted by electrolytic reduction method?
\({\mathrm{\mathrm{Fe}, \mathrm{Cu}, \mathrm{Pb}, \mathrm{Na}, \mathrm{K}, \mathrm{Sn}, \mathrm{Zn}, \mathrm{Mg}, \mathrm{Mn}, \mathrm{Cr}, \mathrm{Ca}, \mathrm{Al}}}\)

1 8
2 5
3 4
4 2
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321120 The most electropositive metals are isolated from their ores by

1 High temperature reduction with carbon
2 Self-reduction
3 Thermal decomposition
4 Electrolysis of fused ionic salts
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321121 Chemical reduction is not suitable for converting

1 Bauxite into aluminum
2 Cuprite into copper
3 Haematite into iron
4 Zinc oxide into zinc
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

321122 Which of the following metal can be extracted without using reducing agent?

1 \(\mathrm{\mathrm{Sn}}\)
2 \(\mathrm{\mathrm{Pb}}\)
3 \(\mathrm{\mathrm{Fe}}\)
4 Both (1) and (2)
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