The metal that is extracted by the electrolytic reduction of its fused salt is: MCQ with Answer and Explanation

The metal that is extracted by the electrolytic reduction of its fused salt is:
A. Zinc
B. Sodium
C. Copper
D. Iron
Answer: Option B
Solution (By JKExamLibrary)
Highly reactive metals (K, Na, Ca, Mg, Al) are extracted by electrolysis of their fused (molten) salts because chemical reducing agents cannot reduce their ores. For sodium, Down's process: electrolysis of molten NaCl with CaCl₂ to lower melting point. Iron is extracted by smelting (blast furnace). Copper and zinc can be extracted by reduction with coke or electrolytic refining of impure metal.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More chemistry Questions

Question #1
Which of the following has a triple bond?
A. Ethene
B. Benzene
C. Ethane
D. Ethyne

Correct Answer: Option D


Explanation:
Ethyne (C₂H₂) has a carbon-carbon triple bond (HC≡CH). Ethene has double; ethane single; benzene has delocalized pi bonds.

This question belongs to: Science chemistry
Question #2
The setting of cement is an:
A. Exothermic process
B. Evaporation process
C. Oxidation process
D. Endothermic process

Correct Answer: Option A


Explanation:
Hydration of cement is exothermic (heat of hydration). In large concrete pours, this heat can cause thermal cracking. Cooling is sometimes needed.

This question belongs to: Science chemistry
Question #3
The number of valence electrons in an atom with electronic configuration 2, 8, 2 is:
A. 12
B. 2
C. 10
D. 8

Correct Answer: Option B


Explanation:
Valence electrons are the electrons in the outermost shell. Configuration 2,8,2 means K=2, L=8, M=2. The outermost shell M has 2 electrons, so valency is 2, typical of Group 2 metals (Mg). These atoms lose 2 electrons to form M²⁺. The number of valence electrons determines the group in the periodic table. Elements with 2 valence electrons belong to Group 2 (alkaline earth metals).

This question belongs to: Science chemistry