Metals Test

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Metals Test - 1

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Weekly Quiz Competition

Question 1
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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
Question 2
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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)
Question 3
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
Question 4
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.
Question 5
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
Question 6
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.
Question 7
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.
Question 8
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.
Question 9
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
Question 10
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
Question 11
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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)
Question 12
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
Question 13
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

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Metals Test - 1

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Metals Test - 1

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Question 1

2Na + 2H2O ––>2NaOH + H2

Ca + 2H2O ––>Ca(OH)2 + H2

Cu + H2O ––>CuO + H2

Mg + H2O ––>MgO + H2

Question 2

(i), (iv), (v)

(i), (iii), (v)

(i), (ii), (iii)

(ii), (iv), (v)

Question 3

2NaO + Al2O3 + H2

2NaAlO2 + 3H2

2NaO + H2O + Al2O3

2NaAlO2 + Al2O3

Question 4

Because of high density of mercury and zinc.

Because of volatile nature of mercury and zinc

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

Because of their ability to form alloys and amalgams.

Question 5

MgO, CO2

Na2O, BeO

SO2, NO

Li2O, BeO

Question 6

Dilute acids react with iron to give hydrogen.

Concentrated sulphuric acid gives sulphur dioxide.

Dilute nitric acid reacts with iron to form nitrogen oxide.

Hot concentrated hydrochloric acid makes iron passive.

Question 7

It is used to coat iron and steel sheets.

It is used as oxidizing agents.

It is used for extraction of silver and gold.

It is used to prepare lithographic plates.

Question 8

It is used for making flash bulbs for photography.

It is used for making mirrors for reflecting telescope.

It is used as an insulators.

Alloys of aluminium are used for making ships.

Question 9

H2SO4

Cl2

S

Fe2O3

Question 10

Aluminium

Zinc

Copper

Iron

Question 11

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

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

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

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

Question 12

Aluminium

Iron

Zinc

Copper

Question 13

Hydraulic washing

Froth floatation

Electromagnetic separation

Distillation

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2Na + 2H₂O ––>2NaOH + H₂

Ca + 2H₂O ––>Ca(OH)₂ + H₂

Cu + H₂O ––>CuO + H₂

Mg + H₂O ––>MgO + H₂

2NaO + Al₂O₃ + H₂

2NaAlO₂ + 3H₂

2NaO + H₂O + Al₂O₃

2NaAlO₂ + Al₂O₃

MgO, CO₂

Na₂O, BeO

SO₂, NO

Li₂O, BeO

H₂SO₄

Cl₂

Fe₂O₃