Concentration of Ores
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320957 In leaching of alumina from bauxite by Bayer's process, the ore is treated with

1 \(\mathrm{\mathrm{NaOH}(\mathrm{aq})}\)
2 \(\mathrm{\mathrm{NaCN}(\mathrm{aq})}\)
3 \(\mathrm{\mathrm{KCN}(\mathrm{aq})}\)
4 \(\mathrm{\mathrm{Na}_{2} \mathrm{CO}_{3}(\mathrm{aq})}\)
MHTCET - 2019
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320958 The chief impurity present in red bauxite is:

1 \(\mathrm{\mathrm{SiO}_{2}}\)
2 \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{K}_{2} \mathrm{SO}_{4}}\)
4 \(\mathrm{\mathrm{NaF}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320959 Which metal is used for extraction of \(\mathrm{\mathrm{Au}}\) and \(\mathrm{\mathrm{Ag}}\) and also for galvanisation of iron objects?

1 \(\mathrm{\mathrm{Mg}}\)
2 \(\mathrm{\mathrm{Zn}}\)
3 \(\mathrm{\mathrm{Cr}}\)
4 \(\mathrm{\mathrm{Co}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320960 In cyanide extraction process of silver from argentite ore, the oxidising and reducing agents are respectively.

1 \(\mathrm{O}_{2}\) and \(\mathrm{CO}_{2}\)
2 \(\mathrm{O}_{2}\) and \(\mathrm{Zn}\) dust
3 \(\mathrm{HNO}_{3}\) and \(\mathrm{Zn}\) dust
4 \(\mathrm{HNO}_{3}\) and \(\mathrm{CO}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320961 Which of the following metal is obtained by leaching process using a solution of \(\mathrm{\mathrm{NaCN}}\) and then precipitating the metal by addition of zinc dust?

1 Copper
2 Silver
3 Nickel
4 Iron
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320957 In leaching of alumina from bauxite by Bayer's process, the ore is treated with

1 \(\mathrm{\mathrm{NaOH}(\mathrm{aq})}\)
2 \(\mathrm{\mathrm{NaCN}(\mathrm{aq})}\)
3 \(\mathrm{\mathrm{KCN}(\mathrm{aq})}\)
4 \(\mathrm{\mathrm{Na}_{2} \mathrm{CO}_{3}(\mathrm{aq})}\)
MHTCET - 2019
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320958 The chief impurity present in red bauxite is:

1 \(\mathrm{\mathrm{SiO}_{2}}\)
2 \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{K}_{2} \mathrm{SO}_{4}}\)
4 \(\mathrm{\mathrm{NaF}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320959 Which metal is used for extraction of \(\mathrm{\mathrm{Au}}\) and \(\mathrm{\mathrm{Ag}}\) and also for galvanisation of iron objects?

1 \(\mathrm{\mathrm{Mg}}\)
2 \(\mathrm{\mathrm{Zn}}\)
3 \(\mathrm{\mathrm{Cr}}\)
4 \(\mathrm{\mathrm{Co}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320960 In cyanide extraction process of silver from argentite ore, the oxidising and reducing agents are respectively.

1 \(\mathrm{O}_{2}\) and \(\mathrm{CO}_{2}\)
2 \(\mathrm{O}_{2}\) and \(\mathrm{Zn}\) dust
3 \(\mathrm{HNO}_{3}\) and \(\mathrm{Zn}\) dust
4 \(\mathrm{HNO}_{3}\) and \(\mathrm{CO}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320961 Which of the following metal is obtained by leaching process using a solution of \(\mathrm{\mathrm{NaCN}}\) and then precipitating the metal by addition of zinc dust?

1 Copper
2 Silver
3 Nickel
4 Iron
For More Updates join with Us
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320957 In leaching of alumina from bauxite by Bayer's process, the ore is treated with

1 \(\mathrm{\mathrm{NaOH}(\mathrm{aq})}\)
2 \(\mathrm{\mathrm{NaCN}(\mathrm{aq})}\)
3 \(\mathrm{\mathrm{KCN}(\mathrm{aq})}\)
4 \(\mathrm{\mathrm{Na}_{2} \mathrm{CO}_{3}(\mathrm{aq})}\)
MHTCET - 2019
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320958 The chief impurity present in red bauxite is:

1 \(\mathrm{\mathrm{SiO}_{2}}\)
2 \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{K}_{2} \mathrm{SO}_{4}}\)
4 \(\mathrm{\mathrm{NaF}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320959 Which metal is used for extraction of \(\mathrm{\mathrm{Au}}\) and \(\mathrm{\mathrm{Ag}}\) and also for galvanisation of iron objects?

1 \(\mathrm{\mathrm{Mg}}\)
2 \(\mathrm{\mathrm{Zn}}\)
3 \(\mathrm{\mathrm{Cr}}\)
4 \(\mathrm{\mathrm{Co}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320960 In cyanide extraction process of silver from argentite ore, the oxidising and reducing agents are respectively.

1 \(\mathrm{O}_{2}\) and \(\mathrm{CO}_{2}\)
2 \(\mathrm{O}_{2}\) and \(\mathrm{Zn}\) dust
3 \(\mathrm{HNO}_{3}\) and \(\mathrm{Zn}\) dust
4 \(\mathrm{HNO}_{3}\) and \(\mathrm{CO}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320961 Which of the following metal is obtained by leaching process using a solution of \(\mathrm{\mathrm{NaCN}}\) and then precipitating the metal by addition of zinc dust?

1 Copper
2 Silver
3 Nickel
4 Iron
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320957 In leaching of alumina from bauxite by Bayer's process, the ore is treated with

1 \(\mathrm{\mathrm{NaOH}(\mathrm{aq})}\)
2 \(\mathrm{\mathrm{NaCN}(\mathrm{aq})}\)
3 \(\mathrm{\mathrm{KCN}(\mathrm{aq})}\)
4 \(\mathrm{\mathrm{Na}_{2} \mathrm{CO}_{3}(\mathrm{aq})}\)
MHTCET - 2019
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320958 The chief impurity present in red bauxite is:

1 \(\mathrm{\mathrm{SiO}_{2}}\)
2 \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{K}_{2} \mathrm{SO}_{4}}\)
4 \(\mathrm{\mathrm{NaF}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320959 Which metal is used for extraction of \(\mathrm{\mathrm{Au}}\) and \(\mathrm{\mathrm{Ag}}\) and also for galvanisation of iron objects?

1 \(\mathrm{\mathrm{Mg}}\)
2 \(\mathrm{\mathrm{Zn}}\)
3 \(\mathrm{\mathrm{Cr}}\)
4 \(\mathrm{\mathrm{Co}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320960 In cyanide extraction process of silver from argentite ore, the oxidising and reducing agents are respectively.

1 \(\mathrm{O}_{2}\) and \(\mathrm{CO}_{2}\)
2 \(\mathrm{O}_{2}\) and \(\mathrm{Zn}\) dust
3 \(\mathrm{HNO}_{3}\) and \(\mathrm{Zn}\) dust
4 \(\mathrm{HNO}_{3}\) and \(\mathrm{CO}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320961 Which of the following metal is obtained by leaching process using a solution of \(\mathrm{\mathrm{NaCN}}\) and then precipitating the metal by addition of zinc dust?

1 Copper
2 Silver
3 Nickel
4 Iron
Join With Us for More Updates
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320957 In leaching of alumina from bauxite by Bayer's process, the ore is treated with

1 \(\mathrm{\mathrm{NaOH}(\mathrm{aq})}\)
2 \(\mathrm{\mathrm{NaCN}(\mathrm{aq})}\)
3 \(\mathrm{\mathrm{KCN}(\mathrm{aq})}\)
4 \(\mathrm{\mathrm{Na}_{2} \mathrm{CO}_{3}(\mathrm{aq})}\)
MHTCET - 2019
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320958 The chief impurity present in red bauxite is:

1 \(\mathrm{\mathrm{SiO}_{2}}\)
2 \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{K}_{2} \mathrm{SO}_{4}}\)
4 \(\mathrm{\mathrm{NaF}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320959 Which metal is used for extraction of \(\mathrm{\mathrm{Au}}\) and \(\mathrm{\mathrm{Ag}}\) and also for galvanisation of iron objects?

1 \(\mathrm{\mathrm{Mg}}\)
2 \(\mathrm{\mathrm{Zn}}\)
3 \(\mathrm{\mathrm{Cr}}\)
4 \(\mathrm{\mathrm{Co}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320960 In cyanide extraction process of silver from argentite ore, the oxidising and reducing agents are respectively.

1 \(\mathrm{O}_{2}\) and \(\mathrm{CO}_{2}\)
2 \(\mathrm{O}_{2}\) and \(\mathrm{Zn}\) dust
3 \(\mathrm{HNO}_{3}\) and \(\mathrm{Zn}\) dust
4 \(\mathrm{HNO}_{3}\) and \(\mathrm{CO}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320961 Which of the following metal is obtained by leaching process using a solution of \(\mathrm{\mathrm{NaCN}}\) and then precipitating the metal by addition of zinc dust?

1 Copper
2 Silver
3 Nickel
4 Iron