Match items in column - I with the items of column – II and assign the correct code.

Column-I		Column-II
A.	Cyanide process	(i)	Ultrapure Ge
B	Froth floatation process	(ii)	Dressing of ZnS
C	Electrolytic reduction	(iii)	Extraction of Al
D	Zone refining	(iv)	Extraction of Au
		(v)	Purification of Ni

(a)

A	B	C	D
(i)	(ii)	(iii)	(iv)

(b)

A	B	C	D
(iii)	(iv)	(v)	(i)

(c)

A	B	C	D
(iv)	(ii)	(iii)	(i)

(d)

A	B	C	D
(ii)	(iii)	(i)	(v)

Which one of the following is not feasible

(a)

Zn_(s) + Cu²⁺_(aq) \(\rightarrow\) Cu_(s) + Zn²⁺_(aq)

(b)

Cu_(s)+ Zn²⁺_(aq)\(\rightarrow\) Zn_(s) + Cu²⁺_(aq)

(c)

Cu_(s) + 2Ag⁺_(ag)\(\rightarrow\) 2Ag_(s) + Cu²⁺_(aq)

(d)

Fe_(s) + Cu²⁺_(aq) \(\rightarrow\) Cu_(s)+ Fe²⁺_(aq)

Cupellation is a process used for the refining of________.

(a)

Silver

(b)

Lead

(c)

Copper

(d)

iron

Which of the following is commonly used to produce foam in froth floatation process?

(a)

Pine oil

(b)

Cresol

(c)

NaCN

(d)

Xanthate

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with________.

(a)

Iron sulphide (FeS)

(b)

Carbon monoxide (CO)

(c)

Copper (I) sulphide (Cu₂S)

(d)

Sulphur dioxide (SO₂)

Identify the decreasing order of carbon content in different forms of iron________.

(a)

Wrought iron > Pig iron > castiron

(b)

Castiron > Pig iron > Wrought iron

(c)

Pig iron > Cast iron > Wrought iron

(d)

Cast iron > Wrought iron > Pig iron

Ignition mixture used in aluminothermite process is ________.

(a)

Cr + AI₂O₃

(b)

Mg + BaO₂

(c)

AI + Cr₂O₃

(d)

Ba+MgO

Zinc is extracted from Zinc blende by________.

(a)

Carbon reduction process

(b)

Nitrogen reduction process

(c)

Oxygen reduction process

(d)

All of these

Gibb's free energy is given by_______

(a)

\(\Delta { G }^{ 0 }=-nF{ E }^{ 0 }\)

(b)

\(\Delta { G }^{ o }=nF\)

(c)

\(\Delta { G }^{ o }=nF{ E }^{ o }\)

(d)

\(\Delta { E }^{ o }=-nF{ G }^{ 0 }\)

Magnesite is_______.

(a)

Magnesium oxide

(b)

Magnesium carbonate

(c)

Magnesium sulphate

(d)

Magnesium chloride

The following set of reaction is used for refining titanium. This method is known as___________
\({ Ti }_{ (g) }+{ 2I }_{ 2(s) }\longrightarrow { TiI }_{ 4 }\left( vapour \right) \)
\({ Til }_{ 4 }(vapour)\longrightarrow Ti_{ (g) }+{ 2I }_{ 2(s) }\)

(a)

Hall Heroult process

(b)

Mond process

(c)

Van-Arkel process

(d)

Alumino thermic process

A mixture containing sulphides of copper and iron is called______

(a)

mineral

(b)

ore

(c)

matte

(d)

matrix

The percentage of carbon in high carbon steel is_________.

(a)

0.5 - 1%

(b)

0.15 - 1.5%

(c)

0.15 - 1.5%

(d)

0.15 - 0.3%

Steel is an alloy of___________

(a)

iron and carbon

(b)

iron and calcium

(c)

copper and carbon

(d)

copper and iron

In the thermite proces__________is used as a reducing agent

(a)

AI

(b)

CO

(c)

C

(d)

CO₂

What is the role of quick lime in the extraction of Iron from its oxide Fe₂O₃?

Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.

Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

Can the same method of extraction be used for all metals.

Name the two steps involved in the extraction of crude metal

Name the various refining process.

Discuss the process of roasting with suitable example.

Name the ore that can be concentrated by magnetic separation method.

The reaction \({ Cr }_{ 2 }{ O }_{ 3 }+2{ Al }_{ (s) }\longrightarrow { Al }_{ 2 }O_{ 3 }+2Cr\) \(\Delta { G }^{ 0 }=-421KJ\) is thermodynamically feasible why does it not take place at room temperature?

Name and discuss the principle involved in obtaining silicon of high purity.

Explain zone refining process with an example.

Give the uses of zinc.

Give the basic requirement for vapour phase refining.

What is cyanide leaching? Give an example

What is vapour phase method?

Distinguish Roasting and Calcination.

What is the role of depressants in froth flotation process?

Define the term slag.

What is auto-reduction?

Write the chemical composition of the following alloys and give anyone of its application.
(i) Bronze
(ii) Brass
(iii) Stainless steelass

Describe the role of the following in the process mentioned.
(i) Silica in the extraction of copper.
(ii) Cryolite in the extraction of aluminium.
(iii) Iodine in the refining of Zirconium.
(iv) Sodium cyanide in froth floatation.

Explain the principle of electrolytic refining with an example.

Explain froth flotation, with diagram.

In the extraction of copper, explain the smelting process.

List out the application of aluminum.

List the applications of iron.

What is zone refining? Describe the principle involved in the purification of the metal by this method.