General Principles and Processes of Isolation of Elements Test

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General Principles and Processes of Isolation of Elements Test - 40

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Weekly Quiz Competition

Question 1
1 / -0

Identify the metal $$M$$ whose extraction is based on the following reactions:
$$MS+2{ O }_{ 2 }\longrightarrow M{ SO }_{ 4 }$$
$$2MS+3{ O }_{ 2 }\longrightarrow 2MO+2S{ O }_{ 2 }$$
$$MS+2MO\longrightarrow 3M+S{ O }_{ 2 }$$
$$MS+M{ SO }_{ 4 }\longrightarrow 2M+2S{ O }_{ 2 }\quad $$

A
magnesium

B
aluminium

C
lead

D
tin

Solution

Solution
First Reaction is Roasting
The third and Fourth Reaction are self-reduction reactions
Only lead goes through two times reduction.
The correct answer is C
Question 2
1 / -0

Which of the following is a non-metallic mineral?

A
Bauxite

B
Magnesium

C
Gypsum

D
Manganese

Solution
Question 3
1 / -0

In the silver plating of copper, K[Ag$$(CN)_2$$] is used instead of Ag$$NO_3$$. The reason is:

A
a thin layer of Ag is formed om Cu

B
more voltage is required

C
$$Ag^+$$ ions are completely removed from solution

D
less availability of $$Ag^+$$ ions, as Cu cannot displace Ag from $$[Ag(CN)_2]^-$$ ion
Question 4
1 / -0

Gold paint is made from:

A
copper

B
platinum

C
gold

D
antimony

Solution

Gambling coppr, Rich, Gold, Plate Gold and siliver are made by suspending bronze and aluminium powder in an alkyal binder. It's light reflecting from all these bits of metals that create metal finish
Question 5
1 / -0

Match the columns.
List I List II
A. Bauxite $$1.$$ Lead
B. Haematite $$2.$$ Thorium
C. Galena $$3.$$ Aluminium
D. Monazite $$4.$$ Iron

A
$$A - 3, B - 1, C - 4, D - 2$$

B
$$A - 4, B - 2, C - 1, D - 3$$

C
$$A - 3, B - 4, C - 1, D - 2$$

D
$$A - 2, B - 4, C - 3, D - 1$$

Solution

Solution:-
(A) Bauxite $$\rightarrow \left( {Al}_{2}{O}_{3}.2{H}_{2}O \right)$$ It is an ore of Aluminium containing $$15-20 \%$$ aluminium. $$\rightarrow$$ (3) Aluminium
(B) Haematite $$\rightarrow \left({Fe}_{2}{O}_{3} \right)$$ A reddish-black mineral consisting of ferric oxide. It is an important ore of iron. $$\rightarrow$$ (4) Iron
(C) Galena $$\rightarrow \left( PbS \right)$$ Galena, also called lead glance, is the natural mineral form of lead(II) sulfide. $$\rightarrow$$ (1) Lead
(D) Monazite $$\rightarrow$$ Monazite is an important ore for thorium, lanthanum, and cerium. It is radioactive due to the presence of thorium. $$\rightarrow$$ (2) Thorium
Question 6
1 / -0

Which of the following statements is correct about the role of collectors added during forth floatation process?

A
Collectors enhance the non-wettability of ore particles

B
Collectors enhance the wettability of gangue particles

C
Collectors help in separating two sulphide ores present in the mixture

D
Collectors help ore particles to settle down below the froth
Solution
Froth floatation method is used for removing gangue from sulphide ores. In this process, a suspension of the powdered ore is made with water.
Collectors and froth stabilizers are added to it. Collectors (e.g., pine oils, fatty acids, xanthates, etc.) enhance non-wettability of the mineral particles and froth stabilizers (e.g., cresols, aniline) stabilize the froth.
The mineral particles become wet by oils while the gangue particles by water.
Question 7
1 / -0

An excess of molybdenum in grassy areas results in poor growth of animals because it blocks the utilization of:

A
oxygen

B
iron

C
copper

D
selenium

Solution

Molybdenum is a dielectric and absorbs calcium from the food we eat and excretes with urine. Without copper, there is no growth of bones. So, there is poor growth in animals.
Question 8
1 / -0

Carbon monoxide is naturally produced by oxidation of X , a gas present in swamp area while it can be produced by Y of fuels containing carbon.

A
X - $$CO_{2}$$, Y = complete combustion

B
X - $$CH_{4}$$, Y = incomplete combustion

C
X = C, Y = oxidation

D
X = $$CH_{4}$$, Y = complete combustion

Solution

Carbon monoxide is basically formed when an object is burned. Methane, which is a natural gas produces CO after oxidation. Methane, produces less CO as compared to other units of gas. Incomplete combusion results in creation of poisonous CO. It occurs when supply of oxygen is poor.
Question 9
1 / -0

Which of the following is a halide ore?

A
Cassiterite

B
Anglesite

C
Siderite

D
Carnallite

Solution

Carnallite is $$KCl.MgCl_2.6H_2O$$
Question 10
1 / -0

Sulphide ore of zinc/copper is concentrated by:

A
forth floatation

B
electromagnetic process

C
gravity process

D
distillation
Solution
Froth floatation method is used for removing gangue from sulphide ores. In this process, a suspension of the powdered ore is made with water.
Collectors and froth stabilizers are added to it. Collectors (e.g., pine oils, fatty acids, xanthates, etc.) enhance non-wettability of the mineral particles and froth stabilizers (e.g., cresols, aniline) stabilize the froth.
The mineral particles become wet by oils while the gangue particles by
water.
A rotating paddle agitates the mixture and draws air in it. As a result, the froth is formed which carries the mineral particles. The froth is light and is skimmed off. It is then dried for recovery of the ore particles.

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Re-Attempt Weekly Quiz Competition

List I	List II
A. Bauxite	$$1.$$ Lead
B. Haematite	$$2.$$ Thorium
C. Galena	$$3.$$ Aluminium
D. Monazite	$$4.$$ Iron

General Principles and Processes of Isolation of Elements Test - 40

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General Principles and Processes of Isolation of Elements Test - 40

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Question 1

magnesium

aluminium

lead

tin

Solution

Question 2

Bauxite

Magnesium

Gypsum

Manganese

Solution

Question 3

a thin layer of Ag is formed om Cu

more voltage is required

$$Ag^+$$ ions are completely removed from solution

less availability of $$Ag^+$$ ions, as Cu cannot displace Ag from $$[Ag(CN)_2]^-$$ ion

Question 4

copper

platinum

gold

antimony

Solution

Question 5

$$A - 3, B - 1, C - 4, D - 2$$

$$A - 4, B - 2, C - 1, D - 3$$

$$A - 3, B - 4, C - 1, D - 2$$

$$A - 2, B - 4, C - 3, D - 1$$

Solution

Question 6

Collectors enhance the non-wettability of ore particles

Collectors enhance the wettability of gangue particles

Collectors help in separating two sulphide ores present in the mixture

Collectors help ore particles to settle down below the froth

Solution

Question 7

oxygen

iron

copper

selenium

Solution

Question 8

X - $$CO_{2}$$, Y = complete combustion

X - $$CH_{4}$$, Y = incomplete combustion

X = C, Y = oxidation

X = $$CH_{4}$$, Y = complete combustion

Solution

Question 9

Cassiterite

Anglesite

Siderite

Carnallite

Solution

Question 10

forth floatation

electromagnetic process

gravity process

distillation

Solution

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