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CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320983 Find the number of reaction from the given reactions which can show calcination process:
i. ${CaCO}_{3} \cdot {MgCO}_{3} \overset{Δ}{\to} CaO + MgO + {CO}_{2}$
ii. ${CuCO}_{3} \cdot Cu (OH)_{2} \overset{Δ}{\to} 2 CuO + H_{2} O + {CO}_{2}$
iii. ${Al}_{2} O_{3} \cdot 2 H_{2} O \overset{Δ}{\to} {Al}_{2} O_{3} + 2 H_{2} O$
iv. $2 {Cu}_{2} S + 3 O_{2} \overset{Δ}{\to} 2 {Cu}_{2} O + 2 {SO}_{2}$

1 1

2 2

3 3

4 4

Explanation:

Calcination is heating the ore strongly in absence of $O_{2}$ or air. Reactions (i), (ii), and (iii) are calcination reactions.

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320984 When limestone is heated strongly, it gives off ${CO}_{2}$ . In metallurgy this process is known as

1 Calcination

2 Roasting

3 Smelting

4 Ore dressing

Explanation:

$C a C O_{3} \to C a O + C O_{2}$

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320985 Which one of the following reactions is an example for calcination process?

1

2 Ag + 2 HCl + (O) \to 2 AgCl + H_{2} O

2

2 Zn + O_{2} \to 2 ZnO

3

2 ZnS + 3 O_{2} \to 2 ZnO + 2 {SO}_{2}

4

{MgCO}_{3} \to MgO + {CO}_{2}

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320986 Roasting or calcination is not an essential step to extract metal from its ore is

1 Chalcocite

2 Galena

3 Argentite

4 Cerussite

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320987 Calcination is the process of heating the ore:

1 In inert gas

2 In the presence of air

3 In the absence of air

4 In the presence of

CaO

and

MgO

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320983 Find the number of reaction from the given reactions which can show calcination process:
i. ${CaCO}_{3} \cdot {MgCO}_{3} \overset{Δ}{\to} CaO + MgO + {CO}_{2}$
ii. ${CuCO}_{3} \cdot Cu (OH)_{2} \overset{Δ}{\to} 2 CuO + H_{2} O + {CO}_{2}$
iii. ${Al}_{2} O_{3} \cdot 2 H_{2} O \overset{Δ}{\to} {Al}_{2} O_{3} + 2 H_{2} O$
iv. $2 {Cu}_{2} S + 3 O_{2} \overset{Δ}{\to} 2 {Cu}_{2} O + 2 {SO}_{2}$

1 1

2 2

3 3

4 4

Explanation:

Calcination is heating the ore strongly in absence of $O_{2}$ or air. Reactions (i), (ii), and (iii) are calcination reactions.

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320984 When limestone is heated strongly, it gives off ${CO}_{2}$ . In metallurgy this process is known as

1 Calcination

2 Roasting

3 Smelting

4 Ore dressing

Explanation:

$C a C O_{3} \to C a O + C O_{2}$

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320985 Which one of the following reactions is an example for calcination process?

1

2 Ag + 2 HCl + (O) \to 2 AgCl + H_{2} O

2

2 Zn + O_{2} \to 2 ZnO

3

2 ZnS + 3 O_{2} \to 2 ZnO + 2 {SO}_{2}

4

{MgCO}_{3} \to MgO + {CO}_{2}

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320986 Roasting or calcination is not an essential step to extract metal from its ore is

1 Chalcocite

2 Galena

3 Argentite

4 Cerussite

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320987 Calcination is the process of heating the ore:

1 In inert gas

2 In the presence of air

3 In the absence of air

4 In the presence of

CaO

and

MgO

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320983 Find the number of reaction from the given reactions which can show calcination process:
i. ${CaCO}_{3} \cdot {MgCO}_{3} \overset{Δ}{\to} CaO + MgO + {CO}_{2}$
ii. ${CuCO}_{3} \cdot Cu (OH)_{2} \overset{Δ}{\to} 2 CuO + H_{2} O + {CO}_{2}$
iii. ${Al}_{2} O_{3} \cdot 2 H_{2} O \overset{Δ}{\to} {Al}_{2} O_{3} + 2 H_{2} O$
iv. $2 {Cu}_{2} S + 3 O_{2} \overset{Δ}{\to} 2 {Cu}_{2} O + 2 {SO}_{2}$

1 1

2 2

3 3

4 4

Explanation:

Calcination is heating the ore strongly in absence of $O_{2}$ or air. Reactions (i), (ii), and (iii) are calcination reactions.

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320984 When limestone is heated strongly, it gives off ${CO}_{2}$ . In metallurgy this process is known as

1 Calcination

2 Roasting

3 Smelting

4 Ore dressing

Explanation:

$C a C O_{3} \to C a O + C O_{2}$

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320985 Which one of the following reactions is an example for calcination process?

1

2 Ag + 2 HCl + (O) \to 2 AgCl + H_{2} O

2

2 Zn + O_{2} \to 2 ZnO

3

2 ZnS + 3 O_{2} \to 2 ZnO + 2 {SO}_{2}

4

{MgCO}_{3} \to MgO + {CO}_{2}

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320986 Roasting or calcination is not an essential step to extract metal from its ore is

1 Chalcocite

2 Galena

3 Argentite

4 Cerussite

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320987 Calcination is the process of heating the ore:

1 In inert gas

2 In the presence of air

3 In the absence of air

4 In the presence of

CaO

and

MgO

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320983 Find the number of reaction from the given reactions which can show calcination process:
i. ${CaCO}_{3} \cdot {MgCO}_{3} \overset{Δ}{\to} CaO + MgO + {CO}_{2}$
ii. ${CuCO}_{3} \cdot Cu (OH)_{2} \overset{Δ}{\to} 2 CuO + H_{2} O + {CO}_{2}$
iii. ${Al}_{2} O_{3} \cdot 2 H_{2} O \overset{Δ}{\to} {Al}_{2} O_{3} + 2 H_{2} O$
iv. $2 {Cu}_{2} S + 3 O_{2} \overset{Δ}{\to} 2 {Cu}_{2} O + 2 {SO}_{2}$

1 1

2 2

3 3

4 4

Explanation:

Calcination is heating the ore strongly in absence of $O_{2}$ or air. Reactions (i), (ii), and (iii) are calcination reactions.

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320984 When limestone is heated strongly, it gives off ${CO}_{2}$ . In metallurgy this process is known as

1 Calcination

2 Roasting

3 Smelting

4 Ore dressing

Explanation:

$C a C O_{3} \to C a O + C O_{2}$

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320985 Which one of the following reactions is an example for calcination process?

1

2 Ag + 2 HCl + (O) \to 2 AgCl + H_{2} O

2

2 Zn + O_{2} \to 2 ZnO

3

2 ZnS + 3 O_{2} \to 2 ZnO + 2 {SO}_{2}

4

{MgCO}_{3} \to MgO + {CO}_{2}

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320986 Roasting or calcination is not an essential step to extract metal from its ore is

1 Chalcocite

2 Galena

3 Argentite

4 Cerussite

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320987 Calcination is the process of heating the ore:

1 In inert gas

2 In the presence of air

3 In the absence of air

4 In the presence of

CaO

and

MgO

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320983 Find the number of reaction from the given reactions which can show calcination process:
i. ${CaCO}_{3} \cdot {MgCO}_{3} \overset{Δ}{\to} CaO + MgO + {CO}_{2}$
ii. ${CuCO}_{3} \cdot Cu (OH)_{2} \overset{Δ}{\to} 2 CuO + H_{2} O + {CO}_{2}$
iii. ${Al}_{2} O_{3} \cdot 2 H_{2} O \overset{Δ}{\to} {Al}_{2} O_{3} + 2 H_{2} O$
iv. $2 {Cu}_{2} S + 3 O_{2} \overset{Δ}{\to} 2 {Cu}_{2} O + 2 {SO}_{2}$

1 1

2 2

3 3

4 4

Explanation:

Calcination is heating the ore strongly in absence of $O_{2}$ or air. Reactions (i), (ii), and (iii) are calcination reactions.

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320984 When limestone is heated strongly, it gives off ${CO}_{2}$ . In metallurgy this process is known as

1 Calcination

2 Roasting

3 Smelting

4 Ore dressing

Explanation:

$C a C O_{3} \to C a O + C O_{2}$

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320985 Which one of the following reactions is an example for calcination process?

1

2 Ag + 2 HCl + (O) \to 2 AgCl + H_{2} O

2

2 Zn + O_{2} \to 2 ZnO

3

2 ZnS + 3 O_{2} \to 2 ZnO + 2 {SO}_{2}

4

{MgCO}_{3} \to MgO + {CO}_{2}

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320986 Roasting or calcination is not an essential step to extract metal from its ore is

1 Chalcocite

2 Galena

3 Argentite

4 Cerussite

CHXII06:GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

320987 Calcination is the process of heating the ore:

1 In inert gas

2 In the presence of air

3 In the absence of air

4 In the presence of

CaO

and

MgO

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