General Principles and Processes of Isolation of Elements Test

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General Principles and Processes of Isolation of Elements Test - 60

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Weekly Quiz Competition

Question 1
1 / -0

Match the processes with the element for which they are used:
Column-I Column-II
(P) Bessemerisation (1) Ti
(Q) Van Arkel Method (2) Cast iron
(R) Carbon reduction (3) Sn
(S) Cupellation (4) Ag

A
$$P - 2, Q - 1, R - 3, S - 4$$

B
$$P - 3, Q - 1, R - 2, S - 4$$

C
$$P - 2, Q - 4, R - 3, S - 1$$

D
$$P - 1, Q - 2, R - 3, S - 4$$
Question 2
1 / -0

What is the role of aniline or cresol when added in a forth floatation process?

A
Stabilizer

B
Depressant

C
Wetting agent

D
All of these
Question 3
1 / -0

the mass of carbon anode consumed (giving only carbon dioxide) in the production of $$270Kg$$ of aluminium metal from bauxite by the Hall's process is:
$$2Al_2O_3+3C \to 4Al + 3CO_2$$

A
$$180Kg$$

B
$$270Kg$$

C
$$240Kg$$

D
$$90Kg$$

Solution

$$2Al_2O_3 + 3C \longrightarrow 4Al + 3CO_2$$
The mass of carbon consumed $$= \dfrac{3\times 12\times 270}{4\times 27} = 90kg$$
Question 4
1 / -0

Statement-I Froth Floatation process is based on the different wetting nature of ore and gangue particles
Statement-II Mustard oil is used as a frother in froth floatation

A
Statement $$I$$ and $$II$$ are correct

B
Both are false

C
Statement $$I$$ is true but $$II$$ is flase

D
Statement $$II$$ is true but $$I$$ is false
Question 5
1 / -0

Which of the following gives an aldehyde on dry distillation?

A
Calcium formate + Calcium acetate

B
Calcium acetate + Calcium benzoate

C
Calcium acetate

D
Calcium benzoate
Question 6
1 / -0

In solid $$CuS{ O }_{4 }.5{H }_{2 }O$$ ,copper is coordinated to number of water molecule:-

A
5

B
4

C
1

D
2

Solution

We know that, $$CuS{O_4}.5{H_2}O$$ can also be written as $$[Cu{({H_2}O)_4}]S{O_4}.{H_2}O$$. Here, the four water molecules inside the coordination sphere are coordinated to Cu and the one water molecule which is outside the coordination sphere is hydrogen bonded.
Hence,(b) is the correct answer.
Question 7
1 / -0

In electrolysis of $${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}$$ by Hall-Heroult process, which of the following statement(s) is/are correct?

A
Cryolite $${\text{N}}{{\text{a}}_{\text{3}}}\left[ {{\text{Al}}{{\text{F}}_{\text{6}}}} \right]\,$$ lowers the meting point of $${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}\,$$increases its electrical conductivity.

B
Al is obtained at cathode and probably$$\,{\text{C}}{{\text{O}}_{\text{2}}}$$ at anode

C
Electrolysis is carried out in aqueous solution at anode

D
Anode consist of graphite
Question 8
1 / -0

Which of the following metals occurs in nature principally oxide ores.

A
$$Ca$$

B
$$Co$$

C
$$Cr$$

D
$$Cu$$

Solution

$$Ca$$ occurs aa calcium oxide.So the naturally occuring oreof calcium is calcium oxide $$ CaO$$.
Hence option A is correct.
Question 9
1 / -0

The incorrect statement for Ellingham diagram is

A
its a graphical representation of standard free energy change with temperature

B
the graph of metal oxides generally moves upward with increase in temperature

C
it represents thermodynamic and kinetic feasibility for the process

D
The steep rise in the slope indicates the phase change
Question 10
1 / -0

An incorrect statement about froth floatation method is:

A
it is used to remove gangue from sulphide ores

B
the mineral particles become wet by oils while gangue particles become wet by water

C
collectors stabilize the froth

D
to separate a mixture of ZnS and PbS depressant used is NaCN

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Re-Attempt Weekly Quiz Competition

General Principles and Processes of Isolation of Elements Test - 60

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General Principles and Processes of Isolation of Elements Test - 60

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SHARING IS CARING

Question 1

$$P - 2, Q - 1, R - 3, S - 4$$

$$P - 3, Q - 1, R - 2, S - 4$$

$$P - 2, Q - 4, R - 3, S - 1$$

$$P - 1, Q - 2, R - 3, S - 4$$

Question 2

Stabilizer

Depressant

Wetting agent

All of these

Question 3

$$180Kg$$

$$270Kg$$

$$240Kg$$

$$90Kg$$

Solution

Question 4

Statement $$I$$ and $$II$$ are correct

Both are false

Statement $$I$$ is true but $$II$$ is flase

Statement $$II$$ is true but $$I$$ is false

Question 5

Calcium formate + Calcium acetate

Calcium acetate + Calcium benzoate

Calcium acetate

Calcium benzoate

Question 6

5

4

1

2

Solution

Question 7

Cryolite $${\text{N}}{{\text{a}}_{\text{3}}}\left[ {{\text{Al}}{{\text{F}}_{\text{6}}}} \right]\,$$ lowers the meting point of $${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}\,$$increases its electrical conductivity.

Al is obtained at cathode and probably$$\,{\text{C}}{{\text{O}}_{\text{2}}}$$ at anode

Electrolysis is carried out in aqueous solution at anode

Anode consist of graphite

Question 8

$$Ca$$

$$Co$$

$$Cr$$

$$Cu$$

Solution

Question 9

its a graphical representation of standard free energy change with temperature

the graph of metal oxides generally moves upward with increase in temperature

it represents thermodynamic and kinetic feasibility for the process

The steep rise in the slope indicates the phase change

Question 10

it is used to remove gangue from sulphide ores

the mineral particles become wet by oils while gangue particles become wet by water

collectors stabilize the froth

to separate a mixture of ZnS and PbS depressant used is NaCN

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