CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320974
Wolframite ore is separated from tin stone ore by the process of
1 Roasting
2 Electromagnetic separation
3 Smelting
4 Calcination
Explanation:
Wolframite ore \(\mathrm{\left[\mathrm{FeWO}_{4}\right]}\) is present in tin stone as impurities, and it has same mass per unit volume as that of tin stone. So it is separated by electromagnetic separator because wolframite is magnetic in nature and hence gets attracted by magnet while tin stone does not.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320975
Tin stone is concentrated by magnetic separation method. The correct statement regarding the ore tin stone is
1 Tin stone is magnetic in nature
2 Wolframite is non-magnetic in nature
3 Wolframite is \(\mathrm{\mathrm{FeWO}_{4}}\) and is magnetic
4 Cassiterite is sulphide ore
Explanation:
\(\mathrm{\mathrm{FeWO}_{4}}\) is impurity in \(\mathrm{\mathrm{SnO}_{2}}\) and is magnetic
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320976
Which is not a correct statement?
1 Cassisterite, chromite and haematite are concentrated by hydraulic washing (Tabling).
2 Pure \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3}}\) is obtained from the bauxite ore by leaching in the Bayer's process.
3 Sulphide ore is concentrated by calcination method.
4 All are incorrect statement
Explanation:
Sulphide ore is roasted in presence of excess of air or \(\mathrm{\mathrm{O}_{2}}\) below its melting point to convert into the oxide and to remove the impurities of S, P, Sb etc., as their volatile oxides. In some cases roasting of certain sulphide ores provide directly the metals.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320977
Concentration of copper pyrites ore is done by
1 Gravity separation method
2 Froth floatation process
3 Electromagnetic separation process
4 Bayer's process
Explanation:
Sulphide ores generally concentrated by froth floatation method.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320978
Statement A : Levigation is used for the separation of oxide ores from impurities. Statement B : Ore particles are removed by washing in a current of water.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Oxide ores being heavier than the earthy or rocky gangue particles, settle down while lighter impurities are washed away. So, the option (1) is correct.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320974
Wolframite ore is separated from tin stone ore by the process of
1 Roasting
2 Electromagnetic separation
3 Smelting
4 Calcination
Explanation:
Wolframite ore \(\mathrm{\left[\mathrm{FeWO}_{4}\right]}\) is present in tin stone as impurities, and it has same mass per unit volume as that of tin stone. So it is separated by electromagnetic separator because wolframite is magnetic in nature and hence gets attracted by magnet while tin stone does not.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320975
Tin stone is concentrated by magnetic separation method. The correct statement regarding the ore tin stone is
1 Tin stone is magnetic in nature
2 Wolframite is non-magnetic in nature
3 Wolframite is \(\mathrm{\mathrm{FeWO}_{4}}\) and is magnetic
4 Cassiterite is sulphide ore
Explanation:
\(\mathrm{\mathrm{FeWO}_{4}}\) is impurity in \(\mathrm{\mathrm{SnO}_{2}}\) and is magnetic
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320976
Which is not a correct statement?
1 Cassisterite, chromite and haematite are concentrated by hydraulic washing (Tabling).
2 Pure \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3}}\) is obtained from the bauxite ore by leaching in the Bayer's process.
3 Sulphide ore is concentrated by calcination method.
4 All are incorrect statement
Explanation:
Sulphide ore is roasted in presence of excess of air or \(\mathrm{\mathrm{O}_{2}}\) below its melting point to convert into the oxide and to remove the impurities of S, P, Sb etc., as their volatile oxides. In some cases roasting of certain sulphide ores provide directly the metals.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320977
Concentration of copper pyrites ore is done by
1 Gravity separation method
2 Froth floatation process
3 Electromagnetic separation process
4 Bayer's process
Explanation:
Sulphide ores generally concentrated by froth floatation method.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320978
Statement A : Levigation is used for the separation of oxide ores from impurities. Statement B : Ore particles are removed by washing in a current of water.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Oxide ores being heavier than the earthy or rocky gangue particles, settle down while lighter impurities are washed away. So, the option (1) is correct.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320974
Wolframite ore is separated from tin stone ore by the process of
1 Roasting
2 Electromagnetic separation
3 Smelting
4 Calcination
Explanation:
Wolframite ore \(\mathrm{\left[\mathrm{FeWO}_{4}\right]}\) is present in tin stone as impurities, and it has same mass per unit volume as that of tin stone. So it is separated by electromagnetic separator because wolframite is magnetic in nature and hence gets attracted by magnet while tin stone does not.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320975
Tin stone is concentrated by magnetic separation method. The correct statement regarding the ore tin stone is
1 Tin stone is magnetic in nature
2 Wolframite is non-magnetic in nature
3 Wolframite is \(\mathrm{\mathrm{FeWO}_{4}}\) and is magnetic
4 Cassiterite is sulphide ore
Explanation:
\(\mathrm{\mathrm{FeWO}_{4}}\) is impurity in \(\mathrm{\mathrm{SnO}_{2}}\) and is magnetic
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320976
Which is not a correct statement?
1 Cassisterite, chromite and haematite are concentrated by hydraulic washing (Tabling).
2 Pure \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3}}\) is obtained from the bauxite ore by leaching in the Bayer's process.
3 Sulphide ore is concentrated by calcination method.
4 All are incorrect statement
Explanation:
Sulphide ore is roasted in presence of excess of air or \(\mathrm{\mathrm{O}_{2}}\) below its melting point to convert into the oxide and to remove the impurities of S, P, Sb etc., as their volatile oxides. In some cases roasting of certain sulphide ores provide directly the metals.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320977
Concentration of copper pyrites ore is done by
1 Gravity separation method
2 Froth floatation process
3 Electromagnetic separation process
4 Bayer's process
Explanation:
Sulphide ores generally concentrated by froth floatation method.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320978
Statement A : Levigation is used for the separation of oxide ores from impurities. Statement B : Ore particles are removed by washing in a current of water.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Oxide ores being heavier than the earthy or rocky gangue particles, settle down while lighter impurities are washed away. So, the option (1) is correct.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320974
Wolframite ore is separated from tin stone ore by the process of
1 Roasting
2 Electromagnetic separation
3 Smelting
4 Calcination
Explanation:
Wolframite ore \(\mathrm{\left[\mathrm{FeWO}_{4}\right]}\) is present in tin stone as impurities, and it has same mass per unit volume as that of tin stone. So it is separated by electromagnetic separator because wolframite is magnetic in nature and hence gets attracted by magnet while tin stone does not.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320975
Tin stone is concentrated by magnetic separation method. The correct statement regarding the ore tin stone is
1 Tin stone is magnetic in nature
2 Wolframite is non-magnetic in nature
3 Wolframite is \(\mathrm{\mathrm{FeWO}_{4}}\) and is magnetic
4 Cassiterite is sulphide ore
Explanation:
\(\mathrm{\mathrm{FeWO}_{4}}\) is impurity in \(\mathrm{\mathrm{SnO}_{2}}\) and is magnetic
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320976
Which is not a correct statement?
1 Cassisterite, chromite and haematite are concentrated by hydraulic washing (Tabling).
2 Pure \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3}}\) is obtained from the bauxite ore by leaching in the Bayer's process.
3 Sulphide ore is concentrated by calcination method.
4 All are incorrect statement
Explanation:
Sulphide ore is roasted in presence of excess of air or \(\mathrm{\mathrm{O}_{2}}\) below its melting point to convert into the oxide and to remove the impurities of S, P, Sb etc., as their volatile oxides. In some cases roasting of certain sulphide ores provide directly the metals.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320977
Concentration of copper pyrites ore is done by
1 Gravity separation method
2 Froth floatation process
3 Electromagnetic separation process
4 Bayer's process
Explanation:
Sulphide ores generally concentrated by froth floatation method.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320978
Statement A : Levigation is used for the separation of oxide ores from impurities. Statement B : Ore particles are removed by washing in a current of water.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Oxide ores being heavier than the earthy or rocky gangue particles, settle down while lighter impurities are washed away. So, the option (1) is correct.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320974
Wolframite ore is separated from tin stone ore by the process of
1 Roasting
2 Electromagnetic separation
3 Smelting
4 Calcination
Explanation:
Wolframite ore \(\mathrm{\left[\mathrm{FeWO}_{4}\right]}\) is present in tin stone as impurities, and it has same mass per unit volume as that of tin stone. So it is separated by electromagnetic separator because wolframite is magnetic in nature and hence gets attracted by magnet while tin stone does not.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320975
Tin stone is concentrated by magnetic separation method. The correct statement regarding the ore tin stone is
1 Tin stone is magnetic in nature
2 Wolframite is non-magnetic in nature
3 Wolframite is \(\mathrm{\mathrm{FeWO}_{4}}\) and is magnetic
4 Cassiterite is sulphide ore
Explanation:
\(\mathrm{\mathrm{FeWO}_{4}}\) is impurity in \(\mathrm{\mathrm{SnO}_{2}}\) and is magnetic
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320976
Which is not a correct statement?
1 Cassisterite, chromite and haematite are concentrated by hydraulic washing (Tabling).
2 Pure \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3}}\) is obtained from the bauxite ore by leaching in the Bayer's process.
3 Sulphide ore is concentrated by calcination method.
4 All are incorrect statement
Explanation:
Sulphide ore is roasted in presence of excess of air or \(\mathrm{\mathrm{O}_{2}}\) below its melting point to convert into the oxide and to remove the impurities of S, P, Sb etc., as their volatile oxides. In some cases roasting of certain sulphide ores provide directly the metals.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320977
Concentration of copper pyrites ore is done by
1 Gravity separation method
2 Froth floatation process
3 Electromagnetic separation process
4 Bayer's process
Explanation:
Sulphide ores generally concentrated by froth floatation method.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS
320978
Statement A : Levigation is used for the separation of oxide ores from impurities. Statement B : Ore particles are removed by washing in a current of water.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Oxide ores being heavier than the earthy or rocky gangue particles, settle down while lighter impurities are washed away. So, the option (1) is correct.
