General Principles and Processes of Isolation of Elements  MCQs

MCQs of General Principles and Processes of Isolation of Elements

Showing 51 to 60 out of 154 Questions
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51.
Where is gold deposited (collected) in electrolytic refining of copper ?
(a) At cathode
(b) In the electrolytic solution
(c) As cathodic mud
(d) As anode mud
Answer:

Option (d)

52.
Fe2O3 is converted into _____ during roasting and calcination.
(a) Fe2O3
(b) Fe3O4
(c) FeO2
(d) Fe2O5
Answer:

Option (a)

53.
Which of the following helps to understand the reactions taking place in the blast furnace ?
(a) Chemical kinetics
(b) Nuclear chemistry
(c) Thermodynamics
(d) Analytical chemistry
Answer:

Option (c)

54.
What is the endothermic reaction taking place in the blast furnace ?
(a) 2C + O2 → 2CO
(b) C + O2 → CO2
(c) Fe2O3 + 3CO → 2Fe + 3CO2
(d) CaCO3 → CaO + CO2
Answer:

Option (d)

55.
In the extraction of zinc, a small condenser made of iron is called _____ .
(a) Spelter
(b) Prolong
(c) Flux
(d) Retort
Answer:

Option (b)

56.
How is zinc extracted from zinc blende ?
(a) Electrolytic reduction
(b) Roasting and then reduction by carbon
(c) Roasting and then reduction by another metal
(d) Roasting and then self reduction
Answer:

Option (b)

57.
Which metal is used in galvanizing ?
(a) Zince
(b) Aluminium
(c) Iron
(d) Copper
Answer:

Option (a)

58.
How is zinc obtained from zinc blende ?
(a) Auto reduction and roasting
(b) Electrolytic reduction
(c) Reduction by carbon and roasting
(d) Reduction by other metal and roasting
Answer:

Option (c)

59.
Match the Column-I and Column-II

Column-I

Column-II

(a) Kaolinite

(1) ZnCO3

(b) Malachite

(2) FeCO3

(c) Siderite

(3) CaCO3 . Cu(OH)2

(d) Calamine

(4) [Al2 (OH)4 Si2O5]
(a) (a) → (3), (b) → (1), (c) → (4), (d) → (2)
(b) (a) → (4), (b) → (2), (c) → (3), (d) → (1)
(c) (a) → (3), (b) → (1), (c) → (2), (d) → (4)
(d) (a) → (4), (b) → (3), (c) → (2), (d) → (1)
Answer:

Option (d)

60.
Which of the following is correct for the empirical formula AlOx(OH)3-2x
(a) 0 > x > 1
(b) 0 < x > 1
(c) 0 < x < 1
(d) x = 0
Answer:

Option (c)

Showing 51 to 60 out of 154 Questions
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