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

320962 Statement A :
Zinc can be used while copper cannot be used in the recovery of Ag from the complex \(\mathrm{\left[\operatorname{Ag}(\mathrm{CN})_{2}\right]^{-}}\)
Statement B :
Zinc is a powerful reducing agent than copper.

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.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320963 Which of the following reaction is a part of Serpeck's process?

1 \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3}+2 \mathrm{NaOH} \rightarrow 2 \mathrm{NaAlO}_{2}+\mathrm{H}_{2} \mathrm{O}}\)
2 \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}+2 \mathrm{Al} \rightarrow 2 \mathrm{Fe}+\mathrm{Al}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{AlN}+3 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Al}(\mathrm{OH})_{3}+\mathrm{NH}_{3}}\)
4 \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3} \cdot 2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{Na}_{2} \mathrm{CO}_{3} \rightarrow 2 \mathrm{NaAlO}_{2}+\mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320964 Extraction of gold and silver involves leaching with \(\mathrm{\mathrm{CN}^{-}}\)ion. Silver is later recovered by

1 Distillation
2 Zone refining
3 Displacement with \(\mathrm{\mathrm{Zn}}\)
4 Liquation
NEET - 2017
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320965 The metal extracted by leaching with cyanide is

1 \(\mathrm{\mathrm{Cu}}\)
2 \(\mathrm{\mathrm{Al}}\)
3 \(\mathrm{\mathrm{Na}}\)
4 \(\mathrm{\mathrm{Ag}}\)
KCET - 2017
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320962 Statement A :
Zinc can be used while copper cannot be used in the recovery of Ag from the complex \(\mathrm{\left[\operatorname{Ag}(\mathrm{CN})_{2}\right]^{-}}\)
Statement B :
Zinc is a powerful reducing agent than copper.

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.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320963 Which of the following reaction is a part of Serpeck's process?

1 \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3}+2 \mathrm{NaOH} \rightarrow 2 \mathrm{NaAlO}_{2}+\mathrm{H}_{2} \mathrm{O}}\)
2 \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}+2 \mathrm{Al} \rightarrow 2 \mathrm{Fe}+\mathrm{Al}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{AlN}+3 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Al}(\mathrm{OH})_{3}+\mathrm{NH}_{3}}\)
4 \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3} \cdot 2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{Na}_{2} \mathrm{CO}_{3} \rightarrow 2 \mathrm{NaAlO}_{2}+\mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320964 Extraction of gold and silver involves leaching with \(\mathrm{\mathrm{CN}^{-}}\)ion. Silver is later recovered by

1 Distillation
2 Zone refining
3 Displacement with \(\mathrm{\mathrm{Zn}}\)
4 Liquation
NEET - 2017
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320965 The metal extracted by leaching with cyanide is

1 \(\mathrm{\mathrm{Cu}}\)
2 \(\mathrm{\mathrm{Al}}\)
3 \(\mathrm{\mathrm{Na}}\)
4 \(\mathrm{\mathrm{Ag}}\)
KCET - 2017
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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320962 Statement A :
Zinc can be used while copper cannot be used in the recovery of Ag from the complex \(\mathrm{\left[\operatorname{Ag}(\mathrm{CN})_{2}\right]^{-}}\)
Statement B :
Zinc is a powerful reducing agent than copper.

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.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320963 Which of the following reaction is a part of Serpeck's process?

1 \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3}+2 \mathrm{NaOH} \rightarrow 2 \mathrm{NaAlO}_{2}+\mathrm{H}_{2} \mathrm{O}}\)
2 \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}+2 \mathrm{Al} \rightarrow 2 \mathrm{Fe}+\mathrm{Al}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{AlN}+3 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Al}(\mathrm{OH})_{3}+\mathrm{NH}_{3}}\)
4 \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3} \cdot 2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{Na}_{2} \mathrm{CO}_{3} \rightarrow 2 \mathrm{NaAlO}_{2}+\mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320964 Extraction of gold and silver involves leaching with \(\mathrm{\mathrm{CN}^{-}}\)ion. Silver is later recovered by

1 Distillation
2 Zone refining
3 Displacement with \(\mathrm{\mathrm{Zn}}\)
4 Liquation
NEET - 2017
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320965 The metal extracted by leaching with cyanide is

1 \(\mathrm{\mathrm{Cu}}\)
2 \(\mathrm{\mathrm{Al}}\)
3 \(\mathrm{\mathrm{Na}}\)
4 \(\mathrm{\mathrm{Ag}}\)
KCET - 2017
For More Updates join with Us
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320962 Statement A :
Zinc can be used while copper cannot be used in the recovery of Ag from the complex \(\mathrm{\left[\operatorname{Ag}(\mathrm{CN})_{2}\right]^{-}}\)
Statement B :
Zinc is a powerful reducing agent than copper.

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.
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320963 Which of the following reaction is a part of Serpeck's process?

1 \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3}+2 \mathrm{NaOH} \rightarrow 2 \mathrm{NaAlO}_{2}+\mathrm{H}_{2} \mathrm{O}}\)
2 \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}+2 \mathrm{Al} \rightarrow 2 \mathrm{Fe}+\mathrm{Al}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{AlN}+3 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Al}(\mathrm{OH})_{3}+\mathrm{NH}_{3}}\)
4 \(\mathrm{\mathrm{Al}_{2} \mathrm{O}_{3} \cdot 2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{Na}_{2} \mathrm{CO}_{3} \rightarrow 2 \mathrm{NaAlO}_{2}+\mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\)
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320964 Extraction of gold and silver involves leaching with \(\mathrm{\mathrm{CN}^{-}}\)ion. Silver is later recovered by

1 Distillation
2 Zone refining
3 Displacement with \(\mathrm{\mathrm{Zn}}\)
4 Liquation
NEET - 2017
CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320965 The metal extracted by leaching with cyanide is

1 \(\mathrm{\mathrm{Cu}}\)
2 \(\mathrm{\mathrm{Al}}\)
3 \(\mathrm{\mathrm{Na}}\)
4 \(\mathrm{\mathrm{Ag}}\)
KCET - 2017