General Principles and Processes of Isolation of Elements Test

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General Principles and Processes of Isolation of Elements Test - 48

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Weekly Quiz Competition

Question 1
1 / -0

General method for the extraction of metal from oxide ore is

A
Carbon reduction

B
Reduction by aluminium

C
Reduction by hydrogen

D
Electrolytic reduction

Solution

Carbon reduction , $$Fe_2O_3 + 3C \rightarrow 2 Fe + 3CO$$
Question 2
1 / -0

Which element is found in free state ?

A
Iodine

B
Sulphur

C
Phosphorus

D
Magnesium

Solution

Among the following options, only Sulphur is found in its free state i.e. $$S_8$$.
Hence, Option "B" is the correct answer.
Question 3
1 / -0

Which occurs in nature in free state?

A
Fe

B
Co

C
Ni

D
Pt

Solution

Pt metal occurs in nature in free state because Pt is a noble metal.
Question 4
1 / -0

A substance which reacts with gangue to form fusible material is called

A
Flux

B
Catalyst

C
Ore

D
Slag

Solution

(Impurity) Gangue + flux $$\rightarrow $$ Slag
Infusible Fusible

Option A is correct.
Question 5
1 / -0

Which one of the following is Fluorspar?

A
$$CaF_2$$

B
$$CaO$$

C
$$H_2F_2$$

D
$$CaCO_3$$

Solution

$$CaF_2$$ is called Flourspar.
Hence, Option "A" is the correct answer.
Question 6
1 / -0

Which of the following metal is not found in free state

A
$$Na$$

B
$$Au$$

C
$$Ag$$

D
$$Pb$$

Solution

$$Na$$ is alkali metal highly reactive. Hence present in combined state.
Question 7
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The important step in the extraction of metal from carbonate ore is

A
Calcination

B
Roasting

C
Electro - reduction

D
Cupellation

Solution

Calcination is an important in the extraction process $$ZnCO_3 \rightarrow ZnO + CO_2$$

Option A.
Question 8
1 / -0

For which ore of the metal , forth floatation method is used for concentration

A
Horn silver

B
Bauxite

C
Cinnabar

D
Haematite

Solution

Cinnabar $$(HgS)$$ the ore of mercury is concentrated by froth floatation process.
Question 9
1 / -0

The method of zone refining of metals is based on the principle of

A
greater solubility of the impurity in the molten state than in the solid

B
greater mobility of the pure metal than that of the impurity

C
higher melting point of the impurity than that of the pure metal

D
greater noble character of the solid metal than that of the impurity

Solution

Zone refining of metals is based on the principle of greater solubility of the impurity in the molten state than in the solid.
Hence, Option "A" is the correct answer.
Question 10
1 / -0

Iron is extracted from magnetite by reduction with

A
$$ H_2 $$

B
$$ C $$

C
$$ Mg $$

D
$$ Al $$

Solution

Iron is extracted from magnetite by reduction with carbon.

$$Fe_3O_4 + 2C \xrightarrow{\Delta} 3Fe + 2CO_2$$

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General Principles and Processes of Isolation of Elements Test - 48

Result

General Principles and Processes of Isolation of Elements Test - 48

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SHARING IS CARING

Question 1

Carbon reduction

Reduction by aluminium

Reduction by hydrogen

Electrolytic reduction

Solution

Question 2

Iodine

Sulphur

Phosphorus

Magnesium

Solution

Question 3

Fe

Co

Ni

Pt

Solution

Question 4

Flux

Catalyst

Ore

Slag

Solution

Question 5

$$CaF_2$$

$$CaO$$

$$H_2F_2$$

$$CaCO_3$$

Solution

Question 6

$$Na$$

$$Au$$

$$Ag$$

$$Pb$$

Solution

Question 7

Calcination

Roasting

Electro - reduction

Cupellation

Solution

Question 8

Horn silver

Bauxite

Cinnabar

Haematite

Solution

Question 9

greater solubility of the impurity in the molten state than in the solid

greater mobility of the pure metal than that of the impurity

higher melting point of the impurity than that of the pure metal

greater noble character of the solid metal than that of the impurity

Solution

Question 10

$$ H_2 $$

$$ C $$

$$ Mg $$

$$ Al $$

Solution

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