Metallurgy Test

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Metallurgy Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Which ion formation is not correct according to chemical properties of metals and non-metals?

A
Na -   Na⁺

B
Mg - 3 Mg³⁺

C
Cl +   Cl^-

D
O + 2  O^2-

E
N + 3  N^3-
Question 2
1 / -0

Which of the following correctly represents the flow chart for the manufacture of cast iron?

A

B

C

D

E
Question 3
1 / -0

Which of the following reactions is not possible?

A
2Na + 2H₂O 2NaOH + H₂

B
Ca + 2H₂O Ca(OH)₂ + H₂

C
Cu + H₂O CuO + H₂

D
Mg + H₂O MgO + H₂

E
Zn + H₂O ZnO + H₂
Question 4
1 / -0

Consider the following physical properties:

(i) Low melting and boiling points
(ii) Formation of alloys and amalgams
(iii) Highly lustrous
(iv) Non-conductor of heat and electricity
(v) Low densities

Which of the given physical properties are shown by sulphur and phosphorus?

A
(i), (iv), (v)

B
(i), (iii), (v)

C
(i), (ii), (iii)

D
(ii), (iv), (v)

E
(i), (iii), (iv)
Question 5
1 / -0

What are the products of the following reaction?

2Al + 2NaOH + 2H₂O ?

A
2NaO + Al₂O₃ + H₂

B
2NaAlO₂ + 3H₂

C
2NaO + H₂O + Al₂O₃

D
2NaAlO₂ + Al₂O₃

E
2NaAlO₂ + H₂O
Question 6
1 / -0

Why is distillation method most commonly used for refining metals such as mercury and zinc?

A
Because of high density of mercury and zinc.

B
Because of volatile nature of mercury and zinc.

C
Because of high melting and boiling points of zinc and mercury.

D
Because of their ability to form alloys and amalgams.

E
None of these
Question 7
1 / -0

Which of the following pairs of oxides is acidic in nature?

A
MgO, CO₂

B
Na₂O, BeO

C
SO₂, NO

D
Li₂O, BeO

E
MgO, BeO
Question 8
1 / -0

Which of the following statements is not correct about reaction of iron with acids?

A
Dilute acids react with iron to give hydrogen.

B
Concentrated sulphuric acid gives sulphur dioxide.

C
Dilute nitric acid reacts with iron to form nitrogen oxide.

D
Hot concentrated hydrochloric acid makes iron passive.

E
None of these
Question 9
1 / -0

Which of the following statements is not correct about the use of zinc?

A
It is used to coat iron and steel sheets.

B
It is used as oxidizing agents.

C
It is used for extraction of silver and gold.

D
It is used to prepare lithographic plates.

E
It is used for making useful alloys such as brass, bronze etc.
Question 10
1 / -0

Which of the following is not correct about uses of aluminium?

A
It is used for making flash bulbs for photography.

B
It is used for making mirrors for reflecting telescope.

C
It is used as an insulators.

D
Alloys of aluminium are used for making ships.

E
It is used to make several high strength light alloys.
Question 11
1 / -0

Which of the following substances is made to react with aluminium in the process of aluminothermy?

A
H₂SO₄

B
Cl₂

C
S

D
Fe₂O₃

E
HNO₃
Question 12
1 / -0

Which of the following metals will form a green deposit on its surface when exposed to moist air?

A
Aluminium

B
Zinc

C
Copper

D
Iron

E
Lead
Question 13
1 / -0

Consider the following steps in the extraction of metals:

(i) Crushing and grinding
(ii) Extraction of metals
(iii) Refining methods
(iv) Concentration of ground ore
(v) Isolation of metal from concentrated ore by reduction

Which of the following is the correct order of these steps in the extraction of metals?

A
(i), (iv), (v), (ii), (iii)

B
(i), (ii), (iii), (iv), (v)

C
(i), (iii), (ii), (iv), (v)

D
(i), (ii), (iv), (iii), (v)

E
(iv), (i), (v), (ii), (iii)
Question 14
1 / -0

Which of the following substances is used as a deoxidiser in the manufacture of steel?

A
Aluminium

B
Iron

C
Zinc

D
Copper

E
Silver
Question 15
1 / -0

Which of the following methods is used for the concentration of ore based on its difference in density with that of gangue particles?

A
Hydraulic washing

B
Froth floatation

C
Electromagnetic separation

D
Distillation

E
Calcination