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Free download in PDF CBSE Class 11 Chemistry Multiple Choice Questions(MCQs) with Answers. Here Gkseries provide Chemistry Solve Questions and Answers for CBSE Class 11 Students.
61
Which metal was first used by man?
[A]
Brass
[B]
Gold
[C]
Aluminium
[D]
Iron
62
Which among the following gases is used to manufacture chloroform?
[A]
Radon
[B]
Methane
[C]
Propane
[D]
Ether
63
Biogas mainly contains
[A]
Methane
[B]
Nitrogen
[C]
Carbon dioxide
[D]
Oxygen
64
Which of the following is the hardest element?
[A]
Silicon
[B]
Iron
[C]
Diamond
[D]
Copper
65
The chemical name of bauxite is
[A]
Hydrated aluminium oxide
[B]
Aluminium sulphite
[C]
Aluminium chloride
[D]
Aluminium oxide
Answer: Hydrated aluminium oxide
66
Which of the following metals is in liquid state at normal room temperature?
[A]
Sodium
[B]
Gallium
[C]
Radon
[D]
Silicon
67
What is the chemical name for marble?
[A]
Titanium dioxide
[B]
Calcium bicarbonate
[C]
Potassium nitrate
[D]
Calcium carbonate
68
Which variety of glass is heat resistant?
[A]
Pyrex glass
[B]
Flint glass
[C]
Hard glass
[D]
Bottle glass
69
In vulcanisation, natural rubber is heated with
[A]
Sulphur
[B]
Phosphorus
[C]
carbon
[D]
Silicon
70
What are soaps?
[A]
Sodium, salts of heavier fatty acids
[B]
Mixture of glycerol and alcohols
[C]
Esters of heavy fatty acids
[D]
Salts of silicates
Answer: Sodium, salts of heavier fatty acids
71
Which one of the following is an element ?
[A]
Diamond
[B]
Sapphire
[C]
Topaz
[D]
Ruby
72
Which one of the following is correct ? Butter is
[A]
A super cooled oil
[B]
an emulsion
[C]
a molecular solid
[D]
none of these
73
Quick silver is another name for
[A]
Mercury
[B]
Copper
[C]
Silver
[D]
Aluminium
74
Which one of the following contains maximum percentage of nitrogen by mass?
[A]
Ammonium nitrate
[B]
Ammonium carbonate
[C]
Urea
[D]
Ammonium cyanide
75
The National Chemical Laboratory(India) is located in
[A]
Pune
[B]
Hyderabad
[C]
Bengaluru
[D]
Mumbai
76
Camphor can easily be purified by the process of
[A]
Sedimentation
[B]
Sublimation
[C]
Distillation
[D]
Crystallization
77
Broken glass that is used in the manufacture of glass is called
[A]
Cullet
[B]
Waste glass
[C]
Raw material
[D]
Batch
78
Which one of the following is a protein fibre?
[A]
Silk
[B]
Cotton
[C]
Nylon
[D]
Polyester
79
Who was the father of chemistry?
[A]
Cavendish
[B]
Urey
[C]
Robert Boyle
[D]
Lister
80
What is the most common element in the universe?
[A]
Hydrogen
[B]
Helium
[C]
Oxygen
[D]
Iron
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