Match the extraction processes listed in column I with metals listed in column II. Column I Column II (p) Lead (q) Silver (r) Copper (s) Boron A. (1-p,r) (2-p) (3-q) (4-s) B. (2-p,r) (1-p) (3-q) (4-r) C. (1-q,r) (2-p) (4-q) (3-s) D. (1-p) (2-p,r) (3-q) (4-q)

Complex formation and displacement by metal

Chemistry - General Principles Processes Isolation Elements - Quiz-5

In the commercial electrochemical process for aluminum extraction, the electrolyte used as:

$(1) A I {(O H)}_{3} i n N a O H s o l u t i o n (2) A n a q u e o u s s o l u t i o n o f A I_{2} {(S O_{4})}_{3} (3) A m o l t e n m i x t u r e o f A I_{2} O_{3} a n d N a_{3} A I F_{6} (4) A m o l t e n m i x t u r e o f A I O (O H) a n d A I {(O H)}_{3}$

0%
1
0%
2
0%
3
0%
4

Electrolytic reduction of alumina to aluminium by Hall-Heroy process is carried out:

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In the presence of NaCl
0%

In the presence of fluorite
0%

In the presence of cryolite which forms a melt with lower melting temperature
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In the presence of cryolite which forms a melt with higher melting temperature

The methods chiefly used for the extraction of lead and tin from their ores respectively:

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Self reduction and carbon reduction
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Self reduction and electrolytic reduction
0%

Carbon reduction and self reduction
0%

Cyanide process and carbon reduction

Which ore contains both iron and copper ?

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Cuprite
0%

Chalcocite
0%

Chalcopyrite
0%

Malachite

Extraction for zinc from zinc blende is achieved by:

0%

Electrolytic reduction
0%

Roasting followed by reduction with carbon
0%

Roasting followed by reduction with another metal
0%

Roasting followed by self-reduction

Native silver metal forms a water-soluble complex with a dilute aqueous solution of NaCN in the presence of :

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Nitrogen
0%

Oxygen
0%

Carbon Dioxide
0%

Argon

Oxidation states of the metal in the minerals haematite and magnetite, respectively, are

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II, III in haematite and III in magnetite
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II, III in haematite and II in magnetite
0%

II in haematite and II, III in magnetite
0%

III in haematite and II, III in magnetite

A metal's oxide that can be reduced by Fe as a reducing agent at a temperature $T_{1}$ is -

0%

Zr
0%

Ca
0%

Mg
0%

None of the above.

Match the extraction processes listed in column I with metals listed in column II.

Column I	Column II
	(p) Lead
	(q) Silver
	(r) Copper
	(s) Boron

A. (1-p,r) (2-p) (3-q) (4-s)

B. (2-p,r) (1-p) (3-q) (4-r)

C. (1-q,r) (2-p) (4-q) (3-s)

D. (1-p) (2-p,r) (3-q) (4-q)

0%

Self reduction
0%

Carbon reduction
0%

Complex formation and displacement by metal
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Decomposition of iodide

Match the following choosing one item from column X and the appropriate item from column Y

Column X	Column Y
(1) AI	(p) Calamine
(2) Cu	(q) Cryolite
(3) Mg	(r) Malachite
	(s) Carnalite

4.1-r, 2-q,3-s, 4p

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1-q, 2-s,3-r, 4p
0%

1-q, 2-r,3-s, 4p
0%

1-p, 2-r,3-s, 4q
0%

(4) Zn

During the process of electrolytic refining of copper, metals that are present as impurities and settle as anode mud are :

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Ag, and Au
0%

Pb, and Zn
0%

Fe, and Ni
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Sn, and Ag

Match the elements in Column I with methods of purification in Column II.

Column I Column II

(a) Boron (i) Van Arkel method

(b) Tin (ii) Mond's process

(d) Nickel (iv) Zone refining

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(a)-(iv) (b)-(iii) (c)-(i) (d)-(ii)
0%

(a)-(iv) (b)-(iii) (c)-(ii) (d)-(i)
0%

(a)-(ii) (b)-(i) (c)-(iv) (d)-(iii)
0%

(a)-(iii) (b)-(iv) (c)-(i) (d)-(ii)

At a temperature above 1073 K, coke can be used to reduce FeO to Fe.

It can be best explained by :

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Tunabo-Sugano diagram
0%

Born-Haber cycle
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Ellingham diagram
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Orgel diagram

Two sulphide ores are separated by :

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Hydrometallurgy method
0%

Pyrometallurgy method
0%

Froth floatation method
0%

Gravimetric method

Iron ore that is used to line the reverberatory furnace to prepare the purest form of iron is-

0%

Haematite
0%

FeO
0%

$Fe_{3}O_{4}$
0%

None of the above.

The following reactions take place in the blast furnace in the preparation of impure iron.
Identify the reaction pertaining to the formation of the slag.

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2C(s) + O₂(g) → 2CO (g)
0%
Fe₂O₃(s) + 3CO (g) → 2Fe(l) + 3CO₂(g)
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CaCO₃(s) → CaO(s) + CO₂(g)
0%
CaO(s) + SiO₂(s) → CaSiO₃(s)

In the extraction of chlorine by electrolysis of brine :

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Oxidation of $C l^{-}$ ion to chlorine gas occurs.
0%

Reduction of $C l^{-}$ ion to chlorine gas occurs.
0%

For overall reaction $∆ G °$ has negative value.
0%

A displacement reaction takes place.

The copper matte contains-

0%

Sulphides of copper (I), and iron (II)
0%

Sulphides of copper (II), and iron (III)
0%

Sulphides of copper(II), and iron (II)
0%

Sulphides of copper (I), and iron (III)

A number of elements are available in the earth’s crust but the most abundant elements are :

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Al, and Fe
0%

Al, and Cu
0%

Fe, and Cu
0%

Cu, and Ag

In the extraction of copper from its sulphide ore, the metal is formed by the reduction of ${Cu}_{2} S$ with :

0%
$FeS$
0%
$CO$
0%
$C u_{2} O$
0%
${SO}_{2}$

Brine is electrolysed by using inert electrodes. The reaction at anode is :

0%

${Cl}^{-} (aq) \to \frac{1}{2} {Cl}_{2} (g) + e^{-}$ ; $E_{Cell}^{⊝}$ = 1.36 V
0%

$2 H_{2} O (l) \to O_{2} (g) + 4 H^{+} + 4 e^{-}$ ; $E_{Cell}^{⊝}$ = 1.23 V
0%

${Na}^{+} (aq) + e^{-} \to Na (s)$ ; $E_{Cell}^{⊝}$ = 2.71V
0%

$H^{+} (aq) + e^{-} \to \frac{1}{2} H_{2} (g)$ ; $E_{Cell}^{⊝}$ = 0.00 V

In the metallurgy of aluminium :

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${Al}^{3 +}$ is oxidised to $Al$ (s).
0%

Graphite anode is oxidised to carbon monoxide and carbon dioxide.
0%

Oxidation state of oxygen change in the reaction at the anode.
0%

Oxidation state of oxygen changes in the overall reaction involved in the process.

A pair of metals that can be purified by electrolytic refining is-

0%

Cu, and Zn
0%

Ge, and Si
0%

Zr, and Ti
0%

Zn, and Hg

Carbon can reduce FeO to Fe, and produce CO at temperature -

0%

Lower than 400^oC
0%

400^oC
0%

Higher than 600^oC
0%

Higher than 400^oC

The correct statement among the following regarding the reaction of FeO below point A in the above diagram is -

0%

Reduced by carbon monoxide only.
0%

Reduced by both carbon monoxide and carbon.
0%

Reduced by carbon only.
0%

Not reduced by both carbon and carbon monoxide.

The correct statement for the reduction of FeO at the temperature corresponding to point D is:

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$∆ G$ value for the overall reduction reaction with carbon monoxide is zero.
0%

$∆ G$ value for the overall reduction reaction with a mixture of 1 mol carbon, and 1 mol oxygen is positive.
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$∆ G$ value for the overall reduction reaction with a mixture of 2 mol carbon, and 1 mol oxygen will be positive.
0%

$∆ G$ value for the overall reduction reaction with carbon monoxide is negative.

Correct statements among the given options are:

a. Cast iron is obtained by remelting pig iron with scrap iron and coke using hot air blast.

b. In the extraction of silver, silver is extracted as a cationic complex.

c. Nickel is purified by zone refining.

d. Zr, and Ti are purified by the van Arkel method.

0%

(a, b)
0%
(b, c)
0%
(c, d)
0%
(a, d)

In the extraction of aluminium by Hall-Heroult process, purified ${Al}_{2} O_{3}$ is mixed with ${CaF}_{2}$ to

a. Lower the melting point of ${Al}_{2} O_{3}$

b. Increase the conductivity of the molten mixture.

c. Reduce ${Al}^{3 +}$ into $Al (s)$

d. Acts as a catalyst

Choose the correct option:

0%

(a, b)
0%
(b, c)
0%
(c, d)
0%
(a, d)

From the following, the correct statements about the role of substances added in the froth flotation process are:

a. Collectors enhance the non-wettability of the mineral particles.

b. Collectors enhance the wettability of gangue particles,

c. By using depressants in the process two sulphide ores can be separated.

d. Froth stabilizers decrease the wettability of gangue.

0%
(a, b)
0%
(b, c)
0%
(c, d)
0%
(a, c)

In the froth floatation process, zinc sulphide and lead sulphide can be separated by ..

a. Using collectors.

b. Adjusting the proportion of oil to water.

c. Using depressant .

d. Using froth stabilizers .

Choose the correct option:

0%
(a, b)
0%
(b, c)
0%
(c, d)
0%
(a, d)

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Practice Chemistry Quiz Questions and Answers

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Practice Chemistry Quiz Questions and Answers

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