Q1Multiple choice
In the extraction of chlorine by electrolysis of brine ____________.
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Correct option: C
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Worked solution
Option (iii) is the answer.
NCERT Exemplar · Class 12 · Chemistry
Chapter 6: General Principles and Processes of Isolation of Elements
Practice each question, then open the answer or worked solution.
I. Multiple Choice Questions (Type-I)
13 questionsQ2Multiple choice
When copper ore is mixed with silica, in a reverberatory furnace copper matte
is produced. The copper matte contains ____________.
Option (iii) is the answer.
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Worked solution
Solution coming soon.
Q3Multiple choice
Which of the following reactions is an example of autoreduction?
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Correct option: D
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Worked solution
Option (iv) is the answer.
Q4Multiple choice
A number of elements are available in earth’s crust but most abundant
elements are ____________.
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Correct option: A
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Worked solution
Option (i) is the answer.
Q5Multiple choice
Zone refining is based on the principle that ___________.
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Correct option: B
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Worked solution
Option (ii) is the answer.
Q6Multiple choice
In the extraction of copper from its sulphide ore, the metal is formed by the
reduction of Cu2O with
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Correct option: C
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Worked solution
Option (iii) is the answer.
Q7Multiple choice
Brine is electrolysed by using inert electrodes. The reaction at anode is ________.
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Correct option: A
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Worked solution
Option (i) is the answer.
Q8Multiple choice
In the metallurgy of aluminium ________________.
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Correct option: B
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Worked solution
Option (ii) is the answer.
Q9Multiple choice
Electrolytic refining is used to purify which of the following metals?
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Correct option: A
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Worked solution
Option (i) is the answer.
Q10Multiple choice
Extraction of gold and silver involves leaching the metal with CN–ion. The metal is recovered by ________________.
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Correct option: A
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Worked solution
Option (i) is the answer.
Note: Answer the questions 11-13 based on Fig. 6.1.
