This is our second collection of chemistry MCQs series, here, we
have mentioned some more useful questions with answers get this and increase in
your question bank.
General knowledge -General Science
General knowledge -General Science
51: Which of the following has the least penetrating power?
A. All have the same penetrating
power
B. Beta Particles
C. Alpha particles
D. Gamma rays
Answer: Option C
52: The isotope of uranium
capable of sustaining a chain reaction is
A. U-235
B. U-245
C. U-239
D. U-238
Answer: Option A
53: The age of most ancient
geological formations is estimated by
A. Ra - Si method
B. Potassium-argon method
C. C14 method
D. Uranium-lead method
Answer: Option D
54: Who suggested that most
of the mass of the atom is located in the nucleus?
A. Thompson
B. Bohr
C. Rutherford
D. Einstein
Answer: Option C
55: The dark lines in the solar
spectrum are due to
A. absorption of corresponding
wavelengths by the outer layers of the sun
B. destructive interference
between waves of certain definite wavelengths
C. absorption of corresponding
wavelengths by the prism used in the photograph
D. absence of corresponding
wavelengths from the light emitted by the core of the sun
Answer: Option A
56: Which of the following
is used for removing air bubbles from the glass during its manufacture?
A. Arsenous oxide
B. Potassium carbonate
C. Soda ash
D. Feldspar
Answer: Option A
57: Which of the following
is a protein?
A. Natural rubber
B. Starch
C. Cellulose
D. None of these
Answer: Option A
58: Wood is the main raw
material for the manufacture of
A. paint
B. paper
C. ink
D. gunpowder
Answer: Option B
59: Rayon is chemically
A. cellulose
B. pectin
C. glucose
D. amylase
Answer: Option A
60: Optic fibers are mainly
used for which of the following?
A. Musical instruments
B. Food industry
C. Weaving
D. Communication
Answer: Option D
61: Production of
chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used
in which of the following domestic products?
A. Television
B. Refrigerator
C. Tube light
D. Cooking gas
Answer: Option B
62: Balloons are filled with
A. nitrogen
B. helium
C. oxygen
D. argon
Answer: Option B
63: Which of the following
does not contain a coinage metal?
A. Silver and Gold
B. Zinc and Gold
C. Copper and Silver
D. Copper and Gold
Answer: Option B
64: Which metal pollute the
air of a big city?
A. Copper
B. Chromium
C. Lead
D. Cadmium
Answer: Option C
65: Bell metal is an alloy
of
A. nickel and copper
B. zinc and copper
C. brass and nickel
D. tin and copper
Answer: Option D
66: Water is a good solvent
of ionic salts because
A. it has a high specific heat
B. it has no color
C. it has a high dipole moment
D. it has a high boiling point
Answer: Option C
67: Which of the following
is not an isotope of hydrogen?
A. Tritium
B. Deuterium
C. Protium
D. Yttrium
Answer: Option D
68: The main constituents of
pearls are
A. calcium oxide and ammonium
chloride
B. calcium carbonate and
magnesium carbonate
C. aragonite and conchiolin
D. ammonium sulphate and sodium
carbonate
Answer: Option B
69: The major ingredient of
leather is
A. collagen
B. carbohydrate
C. polymer
D. nucleic acid
Answer: Option A
70: What are the soaps?
A. Salts of silicates
B. The mixture of glycerol and
alcohols
C. Sodium or potassium salts of
heavier fatty acids
D. Esters of heavy fatty acids
Answer: Option C
71: How does common salt
help in separating soap from the solution after saponification?
A. By decreasing the density of
Soap
B. By decreasing solubility of
Soap
C. By increasing the density of
Soap
D. By increasing solubility of
Soap
Answer: Option B
72: In vulcanization,
natural rubber is heated with
A. Carbon
B. Silicon
C. Sulphur
D. Phosphorous
Answer: Option C
73: Deep blue color is
imparted to glass by the presence of
A. cupric oxide
B. nickel oxide
C. cobalt oxide
D. iron oxide
Answer: Option C
74: Amalgams are
A. highly colored alloys
B. alloys which contain mercury
as one of the contents
C. alloys which have great
resistance to abrasion
D. alloys which contain carbon
Answer: Option B
75: Which of the following
is the lightest metal?
A. Mercury
B. Lithium
C. Lead
D. Silver
Answer: Option B
76: Which of the following
metals remain in liquid form under normal conditions?
A. Radium
B. Zinc
C. Uranium
D. Mercury
Answer: Option D
77: The type of glass used
in making lenses and prisms is
A. Jena glass
B. soft glass
C. pyrex glass
D. flint glass
Answer: Option D
78: Which one of the
following is the petroleum wax?
A. Paraffin wax
B. Jonoba wax
C. Carnauba wax
D. Beeswax
Answer: Option A
79: Potassium Permanganate
is used for purifying drinking water, because
A. it is a sterilizing agent
B. it dissolves the impurities
of water
C. it is a reducing agent
D. it is an oxidizing agent
Answer: Option D
80: Which of the following
is an element?
A. Ruby
B. Sapphire
C. Emerald
D. Diamond
Answer: Option D
81: Which is/are the
important raw material(s) required in the cement industry?
A. Gypsum and Clay
B. Clay
C. Limestone and Clay
D. Limestone
Answer:
Option C
82: Which type of fire extinguisher is used for petroleum fire?
A. Powder type
B. Liquid type
C. Soda acid type
D. Foam type
Answer: Option A
83: Which of the following
is commonly called a 'polyamide'?
A. Terylene
B. Nylon
C. Rayon
D. Orlon
Answer: Option B
84: Epoxy resins are used as
A. detergents
B. insecticides
C. adhesives
D. moth repellents
Answer: Option C
85: Detergents used for
cleaning clothes and utensils contain?
A. bicarbonates
B. bismuthates
C. sulphonates
D. nitrates
Answer: Option C
86: Glass is made of the
mixture of
A. quartz and mica
B. sand and silicates
C. salt and quartz
D. sand and salt
Answer: Option B
87: The vast resources of
unutilized natural gas can be used in the production of
A. graphite
B. Synthetic petroleum
C. fertilizers
D. carbide
Answer: Option C
88: Paper is manufactured by
A. Wood and resin
B. Wood, sodium and bleaching
powder
C. Wood, calcium, hydrogen
sulphite and resin
D. Wood and bleaching powder
Answer: Option C
89: The wavelength of X-rays
is of the order of
A. 10 micron
B. 1 angstrom
C. 1 cm
D. 1 m
Answer: Option B
90: Mesons are found in
A. Laser beam
B. X-rays
C. Gamma rays
D. Cosmic rays
Answer: Option D
91: Which radioactive
pollutant has recently drawn to the public, due to its occurrence in the
building material?
A. Thorium
B. Radium
C. Plutonium
D. Radan
Answer: Option A
92: Which of the following
shows the masses of the three elementary particles in decreasing order?
A. Leptons, Baryons, Mesons
B. Mesons, Baryons, Leptons
C. Baryons, Mesons, Leptons
D. Leptons, Mesons Baryons
Answer: Option C
93: What is the wavelength
of the visible spectrum?
A. 8500 - 9800 angstrom
B. 7800 - 8000 angstrom
C. 3900 - 7600 angstrom
D. 1300 - 3000 angstrom
Answer: Option C
94: Gypsum is added to
cement clinker to
A. increase the tensile
strength of cement
B. decrease the rate of setting
of the cement
C. facilitate the formation of
a colloidal gel
D. bind the particles of
calcium silicate
Answer: Option B
95: Soap is a mixture of
sodium or potassium salts of
A. dicarboxylic acids
B. monocarboxylic acids
C. glycerol
D. tricarboxylic acids
Answer: Option B
96: Which of the following
is used as a moderator in a nuclear reactor?
A. Thorium
B. Graphite
C. Radium
D. Ordinary water
Answer: Option B
97: Which among the following
is a positively charged particle emitted by a radioactive element?
A. Beta ray
B. Alpha ray
C. Cathode ray
D. Gamma ray
Answer: Option B
98: Atoms are composed of
A. electrons and protons
B. electrons only
C. protons only
D. electrons and nuclei
Answer: Option D
99: In an atomic explosion,
enormous energy is released which is due to
A. conversion of chemical
energy into heat energy
B. conversion of mechanical
energy into nuclear energy
C. conversion of mass into
energy
D. conversion of neutrons into
protons
Answer: Option C
100: Isotopes are separated
by
A. crystallization
B. sublimation
C. distillation
D. filtration
Answer: Option C