The Language of Chemistry Class 7. We covered all the Language of Chemistry Class 7 MCQs in this post for free so that you can practice well for the exam.
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Language of Chemistry Class 7 Objective for Students
Which one of the following is the purest form of Carbon?
(a) Charcoal
(b) Coke
(c) Fullerene
(d) Carbon black
Option d – Carbon black
How is carbon black obtained?
(a) By heating wood at a high temperature in the absence of air.
(b) By heating coal at a high temperature in the absence of air.
(c) By burning hydrocarbons in a limited supply of air.
(d) By heating coal at a high temperature in the presence of air.
Option c – By burning hydrocarbons in a limited supply of air
Incomplete combustion of a fuel gives poisonous ……… gas.
(a) carbon dioxide
(b) isocyanate
(c) carbon monoxide
(d) nitrogen
Option c – carbon monoxide
What is the bond order of the CO group?
(a) 1
(b) 2.5
(c) 3.5
(d) 3
Option d – 3
Which of the following statements is not true?
(a) Buckminsterfullerene is an allotropic of carbon.
(b) Diamond is a good conductor of electricity.
(c) Graphite is a good conductor of electricity.
(d) Each carbon atom in Graphite is attached to the other three carbon atoms.
Option b – Diamond is a good conductor of electricity
Graphene is
(a) An alloy of carbon
(b) Nanostructure of carbon
(c) Isotope of carbon
(d) None of the above
Option b – Nano structure of carbon
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