Extraction of Elements Test

Result

Extraction of Elements Test - 1

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly?

A
Metal sulphides are less stable than the corresponding oxides

B
CO₂ is more volatile than CS₂

C
Metal sulphides are thermodynamically more stable than CS₂

D
CO₂ is thermodynamically more stable than CS₂

Solution

We know that metal suphides are more stable than CS₂ and therefore cannot be reduced using that.

Similarly, above certain temperatures, metal oxides are less stable than CO₂ and therefore can be reduced by CO₂ very easily.

The fact that CO₂ is more or less volatile than CS₂ is of no significance in the process. Only the relative stability of oxides with CO₂ and sulphides with CS₂ is important.
Question 2
1 / -0

During the process of electrolytic refining of copper, some metals present as impurity settle as 'anode mud' These are

A
Sn and Ag

B
Pb and Zn

C
Ag and Au

D
Fe and Ni

Solution

More electropositive metals associated with Cu (Fe, Zn, Co, Ni) pass in solution state and less electropositive metals (Au, Ag) collect below the anode as anode mud.
Hence, option C is correct.
Question 3
1 / -0

Heating mixture of Cu₂O and Cu₂S will give

A
Cu + SO₂

B
Cu + SO₃

C
CuO + CuS

D
Cu₂SO₃

Solution

2Cu₂O + Cu₂S → 6Cu + SO₂
Hence, option A is correct.
Question 4
1 / -0

Refining of Iron is done by

A
electrolytic method

B
zone refining

C
poling

D
selective oxidation

Solution

4FeO + O₂→ 2Fe₂ O₃
Refining of iron is done by the selective oxidation
Question 5
1 / -0

Galvanisation means:

A
decomposition of Zn on Fe

B
decomposition of Al on Fe

C
decomposition of Sn on Fe

D
decomposition of Cu on Fe

Solution

Galvanisation is a process in which iron is protected by forming a layer of Zn on Fe.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Extraction of Elements Test - 1

Result

Extraction of Elements Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

Metal sulphides are less stable than the corresponding oxides

CO2 is more volatile than CS2

Metal sulphides are thermodynamically more stable than CS2

CO2 is thermodynamically more stable than CS2

Solution

Question 2

Sn and Ag

Pb and Zn

Ag and Au

Fe and Ni

Solution

Question 3

Cu + SO2

Cu + SO3

CuO + CuS

Cu2SO3

Solution

Question 4

electrolytic method

zone refining

poling

selective oxidation

Solution

Question 5

decomposition of Zn on Fe

decomposition of Al on Fe

decomposition of Sn on Fe

decomposition of Cu on Fe

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

CO₂ is more volatile than CS₂

Metal sulphides are thermodynamically more stable than CS₂

CO₂ is thermodynamically more stable than CS₂

Cu + SO₂

Cu + SO₃

Cu₂SO₃