West Bengal Board Class 11 Chemistry Question Paper. We covered all the West Bengal Board Class 11 Chemistry Question Paper MCQs in this post for free so that you can practice well for the exam.
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West Bengal Board Class 11 Chemistry Objective Question Paper for Students
Nickel is purified by thermal decomposition of its
(a) chloride
(b) azide
(c) carbonyl
(d) hydride
Option c – carbonyl
The zone refining method of the metals is based on the principle that
(a) impurities are more soluble in the melt than in the solid state of the metal.
(b) impurities are less soluble in the melt than in the solid state of the metal.
(c) metal should be volatile.
(d) Both (a) and (c)
Option a – impurities are more soluble in the melt than in the solid state of the metal
Zone refining method is very useful for producing
(a) semiconductors
(b) metals of very high purity
(c) germanium
(d) All of the above
Option d – All of the above
Which metal can’t be obtained from electrolysis?
(a) Ca
(b) Mg
(c) Cr
(d) Al
Option c – Cr
Refining of silver is done by
(a) liquation
(b) poling
(c) cupellation
(d) van Arkel method
Option c – cupellation
Ultra-purification of a metal is done by
(a) slugging
(b) zone melting
(c) smelting
(d) leaching
Option b – zone melting
We covered all the West Bengal board class 11 chemistry question paper mcqs above in this post for free so that you can practice well for the exam.
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