Here, we have collected some multiple-choice questions based on
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Chemistry MCQs with answers) (Part 1)
General knowledge -General Science
1: Which of the following is used in pencils?
A. Graphite
B. Silicon
C. Charcoal
D. Phosphorous
Answer: Option A
2: Which of the following
metals form an amalgam with other metals?
A. Tin
B. Mercury
C. Lead
D. Zinc
Answer: Option B
3: Brass gets
discolored in the air because of the presence of which of the following gases
in air?
A. Oxygen
B. Hydrogen sulfide
C. Carbon dioxide
D. Nitrogen
Answer: Option B
4: Which of the following is
a nonmetal that remains liquid at room temperature?
A. Phosphorous
B. Bromine
C. Chlorine
D. Helium
Answer: Option B
5: Chlorophyll is a
naturally occurring chelate compound in which central metal is
A. copper
B. magnesium
C. iron
D. calcium
Answer: Option B
6: Chemical formula for
water is
A. NaAlO2
B. H2O
C. Al2O3
D. CaSiO3
Answer: Option B
7: When an iron nail gets
rusted, iron oxide is formed
A. without any change in the
weight of the nail
B. with the decrease in the
weight of the nail
C. with the increase in the
weight of the nail
D. without any change in color
or weight of the nail
Answer: Option C
8: Galvanised iron sheets
have a coating of
A. lead
B. chromium
C. zinc
D. tin
Answer: Option C
9: Among the various
allotropes of carbon,
A. coke is the hardest,
graphite is the softest
B. diamond is the hardest, coke
is the softest
C. diamond is the hardest,
graphite is the softest
D. diamond is the hardest, lamp
black is the softest
Answer: Option C
10: The group of metals Fe,
Co, Ni may best call as
A. transition metals
B. main group metals
C. alkali metals
D. rare metals
Answer: Option A
11: Heavy water is
A. deuterium oxide
B. PH7
C. rainwater
D. tritium oxide
Answer: Option A
12: The gas usually
filled in the electric bulb is
A. nitrogen
B. hydrogen
C. carbon dioxide
D. oxygen
Answer: Option A
13: Washing soda is the
common name for
A. Sodium carbonate
B. Calcium bicarbonate
C. Sodium bicarbonate
D. Calcium carbonate
Answer: Option A
14: Quartz crystals normally
used in quartz clocks etc. is chemically
A. silicon dioxide
B. germanium oxide
C. a mixture of germanium oxide
and silicon dioxide
D. sodium silicate
Answer: Option A
15: Which of the gas is not
known as a greenhouse gas?
A. Methane
B. Nitrous oxide
C. Carbon dioxide
D. Hydrogen
Answer: Option D
16:Bromine is a
A. black solid
B. red liquid
C. colorless gas
D. highly inflammable gas
Answer: Option B
17:What is laughing
gas?
A. Nitrous Oxide
B. Carbon monoxide
C. Sulphur dioxide
D. Hydrogen peroxide
Answer: Option A
18: Actinides are the
elements with atomic numbers from
A. 97 to 104
B. 101 to 115
C. 89 to 103
D. 36 from 43
Answer: Option C
19: The two elements that
are frequently used for making transistors are
A. boron and aluminum
B. silicon and germanium
C. iridium and tungsten
D. niobium and columbium
Answer: Option B
20: The filament of an electric bulb is made of
A. tungsten
B. nichrome
C. graphite
D. iron
Answer: Option A
21: Diamond is an allotropic
form of
A. germanium
B. carbon
C. silicon
D. sulfur
Answer: Option B
22: In fireworks, the green flame is produced because of
A. sodium
B. barium
C. mercury
D. potassium
Answer: Option B
23: Permanent hardness of
water can be removed by adding
A. chlorine
B. washing soda
C. potassium permanganate
D. bleaching powder
Answer: Option B
24: Marsh gas is
A. nitrogen
B. ethane
C. methane
D. hydrogen
Answer: Option C
25: LPG consists mainly
A. methane, ethane, and hexane
B. ethane, hexane and nonane
C. methane, hexane and nonane
D. methane, butane, and propane
Answer: Option D
26: Air is a/an
A. compound
B. element
C. electrolyte
D. mixture
Answer: Option D
27: The hardest
substance available on earth is:
A. Gold
B. Iron
C. Diamond
D. Platinum
Answer: Option C
28: The variety of coal in
which the deposit contains recognizable traces of the original plant material
is
A. bitumen
B. anthracite
C. lignite
D. Peat
Answer: Option
D
29: Tetraethyl lead is
used as
A. painkiller
B. fire extinguisher
C. mosquito repellent
D. petrol additive
Answer: Option D
30: Which of the following is
used as a lubricant?
A. Graphite
B. Silica
C. Iron Oxide
D. Diamond
Answer: Option A
31: The inert gas which is
substituted for nitrogen in the air used by deep-sea divers for breathing, is
A. Argon
B. Xenon
C. Helium
D. Krypton
Answer: Option C
32: The gases used in
different types of welding would include
A. oxygen and hydrogen
B. oxygen, hydrogen, acetylene,
and nitrogen
C. oxygen, acetylene, and argon
D. oxygen and acetylene
Answer: Option D
33: The property of a substance to absorb moisture from the air on exposure is called:
A. osmosis
B. deliquescence
C. efflorescence
D. desiccation
Answer: Option B
34: In which of the
following activities silicon carbide is used?
A. Making cement and glass
B. Disinfecting water of ponds
C. cutting very hard substances
D. Making casts for statues
Answer: Option C
35: The average salinity of
sea water is
A. 3%
B. 3.5%
C. 2.5%
D. 2%
Answer: Option B
36:
Potassium nitrate is used in
A. medicine
B. fertilizer
C. salt
D. glass
Answer: Option B
37: Permanent hardness
of water may be removed by the addition of
A. sodium carbonate
B. alum
C. potassium permanganate
D. lime
Answer:
Option A
38: Soda water
contains
A. carbonic acid
B. sulphuric acid
C. carbon dioxide
D. nitrous acid
Answer: Option C
39: The most important ore
of aluminum is
A. galena
B. calamine
C. calcite
D. bauxite
Answer: Option D
40: Most soluble in water is
A. camphor
B. sulfur
C. common salt
D. sugar
Answer: Option D
41: The chemical (ethyl
mercaptan) added to the otherwise odorless LPG cooking gas for imparting a
detectable smell to the gas is a compound of
A. bromine
B. fluorine
C. chlorine
D. sulfur
Answer: Option D
42: The element common
to all acids is
A. hydrogen
B. carbon
C. sulfur
D. oxygen
Answer: Option A
43: Nonstick cooking
utensils are coated with
A. Teflon
B. PVC
C. black paint
D. polystyrene
Answer: Option A
44: Monazite is an ore of
A. titanium
B. zirconium
C. iron
D. thorium
Answer: Option D
45: Carbon, diamond,
and graphite are together called
A. allotropes
B. isomers
C. isomorphs
D. isotopes
Answer: Option A
46: Which of the following
was to be discovered first in the chromospheres of the sun?
A. Krypton
B. Xenon
C. Neon
D. Helium
Answer: Option D
47: Which of the
following is in liquid form at room temperature?
A. Lithium
B. Sodium
C. Francium
D. Cerium
Answer: Option C
48: Sodium metal is kept
under
A. petrol
B. alcohol
C. water
D. kerosene
Answer: Option D
49: Which of the following are the ingredients of gunmetal?
A. Iron, Zinc, Titanium
B. Iron, tin
C. Iron, Brass, Tin
D. Copper, Tin
Answer: Option D
50: From which mineral
is radium obtained?
A. Rutile
B. Haematite
C. Limestone
D. Pitchblende
Answer: Option D