General Principles and Processes of Isolation of Elements Test

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General Principles and Processes of Isolation of Elements Test - 50

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Weekly Quiz Competition

Question 1
1 / -0

Three most occurring elements into the earth crust are :

A
O ,Si,A1

B
Si, O , Fe

C
Fe , Ca , A1

D
Si , O , N

Solution

Three most occurring elements into the earth crust are O, Si & Al.
Hence, Option "A" is the correct answer.
Question 2
1 / -0

Which of thew following pair is correctly matched ?

A
Copper - Oxidative refining

B
Nickel - Kroll's process

C
Mercury - Distillation

D
Lead - van Arkel method

Solution

Of the above matches, only Mercury is matched incorrectly. It should be matched with Amalgamation.
Hence, Option "C" is the correct answer.
Question 3
1 / -0

In which of the following metallurgy, no reduction agent is required from outside ?

A
Mercury from cinnabar

B
Zinc from zinc blende

C
Iron from heamatite

D
Aluminium from Bauxite

Solution

In case of metallurgy of Mercury from Cinnabar, there is no requirement of reducing agent from outside because Mercury undergoes self-reduction.
Hence, Option "A" is the correct answer.
Question 4
1 / -0

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

A
Greater mobility of the pure metal than that of impurity

B
Higher melting point of the impurity than that of impurity

C
Greater noble charcter of the solid meta than that of the pure metal

D
Greater solubility of the impurity in the molten state than in the solid

Solution

The method of zone refining of metals is based on the principle "Greater solubility of the impurity in the molten state than in the solid"
Hence, Option "D" is the correct answer.
Question 5
1 / -0

Froth floatation process is used to concentrate which type of ores?

A
Sulphide ores

B
Phosphate ores

C
Silicate ores

D
Oxide ores

Solution

The types of ores that can be concentrated by froth floatation process are sulphides ores. Froth floatation is method that is used to separate materials on the basis of their orientation towards water i.e. hydrophilic or hydrophobic.
Question 6
1 / -0

Those natural occurring components from which element can be extracted profitably and conveniently known as

A
Minerals

B
Gangue

C
Ores

D
Flux

Solution

The naturally occurring compounds of metals that are found in earth's crust along with some impurities are called minerals. An ore is the mineral from which the metal can be extracted profitably and conveniently.
hence C isc correct
Question 7
1 / -0

Gravity separation method is used to concentrate which type of ores?

A
Sulphide ores

B
Phosphate ores

C
Silicate ores

D
Oxide ores

Solution

Gravity Separation or Hydraulic Washing (Levigation) For this, either wilfley table or Hydraulic classifier is used. Generally oxide and carbonate ores are concentrated by this method
Question 8
1 / -0

The metal which always exists in free or native state is

A
$$Au$$

B
$$Ag$$

C
$$Cu$$

D
$$Na$$

Solution

gold (Au)
Question 9
1 / -0

The impurities present with minerals are collectively known as

A
Slag

B
Flux

C
Matrix

D
Ores

Solution

Impurities associated with minerals are called gangue or matrix.
Question 10
1 / -0

Which of the following is used in froth floatation process for the benefication of ore?

A
Coconut oil

B
Olive oil

C
Pine oil

D
None of these

Solution

Pine oil is added in the froth flotation method to create froath or bubble so that metal can be purify easily because pine oil prevents the ore from gangue for furthur mixing. Pine oil also acts as best substance for forming froth for the minerals. It also increases the non wettability of mineral particles.

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Re-Attempt Weekly Quiz Competition

General Principles and Processes of Isolation of Elements Test - 50

Result

General Principles and Processes of Isolation of Elements Test - 50

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SHARING IS CARING

Question 1

O ,Si,A1

Si, O , Fe

Fe , Ca , A1

Si , O , N

Solution

Question 2

Copper - Oxidative refining

Nickel - Kroll's process

Mercury - Distillation

Lead - van Arkel method

Solution

Question 3

Mercury from cinnabar

Zinc from zinc blende

Iron from heamatite

Aluminium from Bauxite

Solution

Question 4

Greater mobility of the pure metal than that of impurity

Higher melting point of the impurity than that of impurity

Greater noble charcter of the solid meta than that of the pure metal

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

Solution

Question 5

Sulphide ores

Phosphate ores

Silicate ores

Oxide ores

Solution

Question 6

Minerals

Gangue

Ores

Flux

Solution

Question 7

Sulphide ores

Phosphate ores

Silicate ores

Oxide ores

Solution

Question 8

$$Au$$

$$Ag$$

$$Cu$$

$$Na$$

Solution

Question 9

Slag

Flux

Matrix

Ores

Solution

Question 10

Coconut oil

Olive oil

Pine oil

None of these

Solution

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