General Principles and Processes of Isolation of Elements  MCQs

MCQs of General Principles and Processes of Isolation of Elements

Showing 81 to 90 out of 154 Questions
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81.
Which of the following pairs is proper for the metal to be obtained as shown in Column_I with the corresponding method in Column-II ?

Column-I

Column-II

(P)   Iron

(X)   Bessemerization

(Q)  Copper

(Y)    Blast furnace

(R)   Zinc

(Z)    Retort

 

(M)    Hall_Heroult
(a) (P) → (Y), (Q) → (X), (R) → (Z)
(b) (P) → (Y), (Q) → (X), (R) → (M)
(c) (P) → (X), (Q) → (M), (R) → (Y)
(d) (P) → (M), (Q) → (X), (R) → (Y)
Answer:

Option (a)

82.
Select the suitable choice by comparing Column-A with Column-B.

Column-A

Column-B

(i)     Hall-Heroult

(P)   Method for refining copper

(ii)    Ellingham

(Q)  Alloy of copper

(iii)   Constantan

(R)   Impure form of Al2O3

(iv)  Reverberatory furnace

(S)    Method to obtain pure Al

 

(T)    Study of graphs of change in free energy and temperature

 

(U)  For purification of Zn
(a) (i) → (S), (ii) → (P), (iii) → (R), (iv) → (U)
(b) (i) → (S), (ii) → (T), (iii) → (R), (iv) → (P)
(c) (i) → (U), (ii) → (T), (iii) → (P), (iv) → (S)
(d) (i) → (S), (ii) → (T), (iii) → (Q), (iv) → (P)
Answer:

Option (d)

83.
From which of the following minerals, is aluminium not obtained practically ?
(a) Aluminosillicate
(b) Bauxite
(c) Colemanite
(d) All of these
Answer:

Option (a)

84.
Which element is present in combined from in the haemoglobin present in blood in our body ?
(a) Cu
(b) Mg
(c) Fe
(d) Zn
Answer:

Option (c)

85.
Which one is the ore of Iron ?
(a) Siderite
(b) Sphalerite
(c) Kaolinite
(d) Zincite
Answer:

Option (a)

86.
What is the molecular formula of copper pyrite ?
(a) CuFeS2
(b) CaCO3 • Cu(OH)2
(c) Fe3O4
(d) ZnCO3
Answer:

Option (a)

87.
Which elements are present in Haematite ?
(a) Fe3O4
(b) Fe2O3
(c) FeS2
(d) FeCO3
Answer:

Option (b)

88.
Which Froth Stabilisers are added in Froth Floation method ?
(a) Cresol
(b) Aniline
(c) (A) and (B)
(d) Turpentine
Answer:

Option (c)

89.
Mixture of Cu2S and FeS is known as _____
(a) matte
(b) gangue
(c) ore
(d) slag
Answer:

Option (a)

90.
Al2O3·XH2Os →1470 K Al2O3s + XH2Og given equation indicate which process ?
(a) Leaching of alumina from bauxite
(b) Magnetic separation of alumina
(c) Hydraulic washing
(d) Calcination
Answer:

Option (a)

Showing 81 to 90 out of 154 Questions
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