CBSE class 11 Chemistry Quiz | CBSE class 11 Chemistry MCQs & Answers

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Questions
81 The concept of an electrolyte in water was described by
A Arrhenius
B Debye
C Faraday
D Ohm

Answer: Arrhenius
82 The acid present in lemon is
A citric acid
B tartaric acid
C lactic acid
D marlic acid

Answer: citric acid
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83 The solute in a solution can be separated by
A decantation
B evaporation
C filtration
D sedimentation

Answer: evaporation
84 The major constituent of air is
A Nitrogen
B Oxygen
C Carbon dioxide
D Hydrogen

Answer: Nitrogen
85 The chief source of aluminium is
A Feldspar
B Cargolite
C Bauxite
D Haematite

Answer: Bauxite
86 Another name for mercurous chloride is
A Plaster of paris
B Blue vitriol
C Amalgam
D Calomel

Answer: Plaster of paris
87 Cooking oil can be converted into vegetable ghee by the process of
A Distillation
B Hydrogenation
C Oxidation
D Crystallization

Answer: Hydrogenation
88 Charcoal is
A Hygroscopic
B Amorphous
C Crystalline
D None of these

Answer: Amorphous
89 Who discovered radioactivity?
A Henri Becquerel
B John Dalton
C Roentgen
D Marie Curie

Answer: Henri Becquerel
90 Which one among the following is used as a moderator in nuclear reactors?
A Heavy water
B Hydrogen peroxide
C Heavy hydrogen
D Ozone

Answer: Heavy water
91 Which of the following substance is highly plastic?
A Clay
B Granite
C Quartz
D Mica

Answer: Clay
92 Carbon occurs in nature in the purest form as
A Diamond
B Graphite
C Carbon black
D Coal

Answer: Diamond
93 A polymeric substance used to make parachute is
A Viscose
B Terylene
C Rayon
D Cotton

Answer: Viscose
94 Which variety of coal contains the highest percentage of carbon?
A Lignite
B Peat
C Anthracite
D Bituminous

Answer: Anthracite
95 The oxide of Nitrogen used in medicine as anaesthetic is
A Nitrogen pentoxide
B Nitrous oxide
C Nitrogen dioxide
D Nitric oxide

Answer: Nitrogen pentoxide
96 Which one of the following metals is found in plaster of paris?
A Sodium
B Calcium
C Magnesium
D Pottasium

Answer: Calcium
97 The major ingrediation of leather is
A Collagen
B nuclei acid
C Carbohydrate
D Polymer

Answer: Collagen
98 Which one of the following types of glass can cut off ultraviolet rays?
A crookes glass
B jena glass
C pyrex glass
D soda glass

Answer: crookes glass
99 Select the one which is not a mixture?
A Distilled water
B LPG
C Gasoline
D Air

Answer: Distilled water
100 What is the most common soil in sea water?
A Magnesium sulphate
B Calcium carbonate
C Sodium chloride
D Potassium chloride

Answer: Sodium chloride

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