General Knowledge

General Knowledge

General Science has 125 Questions

Brass gets discoloured in air because of the presence of which of the following gases in air?

Oxygen
Hydrogen sulphide
Carbon dioxide
Nitrogen
What is the unit for measuring the amplitude of a sound?

Decibel
Coulomb
Hum
Cycles
Which of the following is used as a moderator in nuclear reactor?

Thorium
Graphite
Radium
Ordinary water
Which is/are the important raw material(s) required in cement industry?

Gypsum and Clay
Clay
Limestone and Clay
Limestone
Which of the following is a non metal that remains liquid at room temperature?

Phosphorous
Bromine
Chlorine
Helium
Reading of a barometer going down is an indication of

snow
storm
intense heat
rainfall
Which among the following is a positively charged particle emitted by a radioactive element?

Beta ray
Alpha ray
Cathode ray
Gamma ray
Which type of fire extinguisher is used for petroleum fire?

Powder type
Liquid type
Soda acid type
Foam type
Chlorophyll is a naturally occurring chelate compound in which central metal is

copper
magnesium
iron
calcium
Decibel is the unit for

speed of light
radio wave frequency
intensity of sound
intensity of heat
Atoms are composed of

electrons and protons
electrons only
protons only
electrons and nuclei
Which of the following is commonly called a 'polyamide'?

Terylene
Nylon
Rayon
Orlon
Which of the following is used in pencils?

Graphite
Silicon
Charcoal
Phosphorous
One fathom is equal to

6 feet
6 meters
60 feet
100 cm
In an atomic explosion, enormous energy is released which is due to

conversion of chemical energy into heat energy
conversion of mechanical energy into nuclear energy
conversion of mass into energy
conversion of neutrons into protons
Epoxy resins are used as

detergents
insecticides
adhesives
moth repellents
Which of the following metals forms an amalgam with other metals?

Tin
Mercury
Lead
Zinc
Fathom is the unit of

sound
depth
frequency
distance
Isotopes are separated by

crystallisation
sublimation
distillation
filtration
Detergents used for cleaning clothes and utensils contain?

bicarbonates
bismuthates
sulphonates
nitrates
Chemical formula for water is

NaA1O2
H2O
Al2O3
CaSiO3
Light year is a measurement of

speed of aeroplanes
speed of light
Stellar distances
speed of rockets
The wavelength of X-rays is of the order of

10 micron
1 angstrom
1 cm
1 m
Which of the following is used for removing air bubbles from glass during its manufacture?

Arsenous oxide
Potassium carbonate
Soda ash
Feldspar
The gas usually filled in the electric bulb is

nitrogen
hydrogen
carbon dioxide
oxygen
Very small time intervals are accurately measure by

White dwarfs
Quartz clocks
Atomic clocks
Pulsars
Mesons are found in

Laser beam
X-rays
Gamma rays
Cosmic rays
Which of the following is a protein?

Natural rubber
Starch
Cellulose
None of these
Washing soda is the common name for

Sodium carbonate
Calcium bicarbonate
Sodium bicarbonate
Calcium carbonate
One kilometre is equal to how many miles?

0.84
0.5
1.6
0.62
Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?

Thorium
Radium
Plutonium
Radan
Wood is the main raw material for the manufacture of

paint
paper
ink
gun powder
Quartz crystals normally used in quartz clocks etc. is chemically

silicon dioxide
germanium oxide
a mixture of germanium oxide and silicon dioxide
sodium silicate
kilohertz is a unit which measures

power used by a current of one ampere
electromagnetic radio wave frequencies
voltage
electric resistance
Which of the following shows the masses of the three elementary particles in decreasing order?

Leptons, Baryons, Mesons
Mesons, Baryons, Leptons
Baryons, Mesons, Leptons
Leptons, Mesons Baryons
Rayon is chemically

cellulose
pectin
glucose
amylase
Which of the gas is not known as green house gas?

Methane
Nitrous oxide
Carbon dioxide
Hydrogen
One horse power is equal to

746 watts
748 watts
756 watts
736 watts
What is the wavelength of visible spectrum?

8500 - 9800 angstrom
7800 - 8000 angstrom
3900 - 7600 angstrom
1300 - 3000 angstrom
Optic fibres are mainly used for which of the following?

Musical instruments
Food industry
Weaving
Communication
Bromine is a

black solid
red liquid
colourless gas
highly inflammable gas
'Bar' is the unit of

temperature
heat
atmospheric pressure
current
Which of the following has a least penetrating power?

All have same penetrating power
Beta Particles
Alpha particles
Gamma rays
The major ingredient of leather is

collagen
carbohydrate
polymer
nucleic acid
The hardest substance available on earth is

Gold
Iron
Diamond
Platinum
One Joule is equal to

105 ergs
103 ergs
107 ergs
1011 ergs
The isotope of uranium capable of sustaining chain reaction is

U-235
U-245
U-239
U-238
What are the soaps?

Salts of silicates
Mixture of glycerol and alcohols
Sodium or potassium salts of heavier fatty acids
Esters of heavy fatty acids
The variety of coal in which the deposit contains recognisable traces of the original plant material is

bitumen
anthracite
lignite
peat
Kilowatt is a unit to measure

work
power
electricity
current
The age of most ancient geological formations is estimated by

Ra - Si method
Potassium - argon method
C14 method
Uranium - lead method
How does common salt help in separating soap from the solution after saponification?

By decreasing density of Soap
By decreasing solubility of Soap
By increasing density of Soap
By increasing solubility of Soap
Tetraethyl lead is used as

pain killer
fire extinguisher
mosquito repellent
petrol additive
Electric current is measure by

commutator
anemometer
ammeter
voltmeter
Who suggested that most of the mass of the atom is located in the nucleus?

Thompson
Bohr
Rutherford
Einstein
In vulcanisation, natural rubber is heated with

Carbon
Silicon
Sulphur
Phosphorous
Which of the following is used as a lubricant?

Graphite
Silica
Iron Oxide
Diamond
A chronometer measures

colour contrast
sound waves
time
water waves
The dark lines in the solar spectrum are due to

absorption of corresponding wavelengths by the outer layers of the sun
destructive interference between waves of certain definite wavelengths
absorption of corresponding wavelengths by the prism used in the photograph
absence of corresponding wavelengths from the light emitted by the core of the sun
Deep blue colour is imparted to glass by the presence of

cupric oxide
nickel oxide
cobalt oxide
iron oxide
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

Argon
Xenon
Helium
Krypton
Nautical mile is a unit of distance used in

navigation
road mile
astronomy
measuring the boundaries of a nation
In an atomic nucleus, neutrons and protons are held together by

gravitational forces
exchange forces
coulombic forces
magnetic forces
Glass is made of the mixture of

quartz and mica
sand and silicates
salt and quartz
sand and salt
The gases used in different types of welding would include

oxygen and hydrogen
oxygen, hydrogen, acetylene and nitrogen
oxygen, acetylene and argon
oxygen and acetylene
Knot is a unit of speed of which of the following?

Aeroplane
Light waves
Ship
Sound waves
'No two electrons in an atom can have the same set of four quantum numbers' is

Newton's law
Bohr's law
Aufbau principle
Pauli's exclusion principle
The vast resources of unutilised natural gas can be used in the production of

graphite
Synthetic petroleum
fertilisers
carbide
The property of a substance to absorb moisture from the air on exposure is called

osmosis
deliquescence
efflorescence
desiccation
According to Dalton's atomic theory, the smallest particle which can exist independently is

a molecule
a cation
an anion
an atom
Paper is manufactured by

Wood and resin
Wood, sodium and bleaching powder
Wood, calcium, hydrogen sulphite and resin
Wood and bleaching powder
In which of the following activities silicon carbide is used?

Making cement and glass
Disinfecting water of ponds
cutting very hard substances
Making casts for statues
Atoms of an element differ from those of all other elements in

atomic number and electronic configuration
number of neutrons and number of valence electrons
atomic number and number of valence electrons
number of neutrons and electronic configuration
Gypsum is added to cement clinker to

increase the tensile strength of cement
decrease the rate of setting of cement
facilitate the formation of colloidal gel
bind the particles of calcium silicate
The average salinity of sea water is

3%
3.5%
2.5%
2%
Nuclear fission is caused by the impact of

neutron
proton
deuteron
electron
Soap is a mixture of sodium or potassium salts of

dicarboxylic acids
monocarboxylic acids
glycerol
tricarboxylic acids
When an iron nail gets rusted, iron oxide is formed

without any change in the weight of the nail
with decrease in the weight of the nail
with increase in the weight of the nail
without any change in colour or weight of the nail
Which of the following rays are more penetrating?

Beta rays
Alpha rays
Gamma rays
X-rays
The type of glass used in making lenses and prisms is

jena glass
soft glass
pyrex glass
flint glass
Galvanised iron sheets have a coating of

lead
chromium
zinc
tin
How many colours the sunlight spectrum has?

Three
Seven
Four
Five
Which one of the following is the petroleum wax?

Paraffin wax
Jonoba wax
Carnauba wax
Bees wax
Among the various allotropes of carbon,

coke is the hardest, graphite is the softest
diamond is the hardest, coke is the softest
diamond is the hardest, graphite is the softest
diamond is the hardest, lamp black is the softest
The group of metals Fe, Co, Ni may best called as

transition metals
main group metals
alkali metals
rare metals
Heavy water is

deuterium oxide
PH7
rain water
tritium oxide
The chemical (ethyl merceptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of

bromine
fluorine
chlorine
sulphur
The element common to all acids is

hydrogen
carbon
sulphur
oxygen
Non stick cooking utensils are coated with

Teflon
PVC
black paint
polystyrene
Monazite is an ore of

titanium
zirconium
iron
thorium
Carbon, diamond and graphite are together called

allotropes
isomers
isomorphs
isotopes
Potassium nitrate is used in

medicine
fertiliser
salt
glass
Permanent hardness of water may be removed by the addition of

sodium carbonate
alum
potassium permanganate
lime
Soda water contains

carbonic acid
sulphuric acid
carbon dioxide
nitrous acid
The most important ore of aluminium is

galena
calamine
calcite
bauxite
Most soluble in water is

camphor
sulphur
common salt
sugar
Which of the following was to be discovered first in the chromospheres of the sun?

Krypton
Xenon
Neon
Helium
Which of the following is in liquid form at room temperature?

Lithium
Sodium
Francium
Cerium
Sodium metal is kept under

petrol
alcohol
water
kerosene
Which of the following are the ingredients of gun metal?

Iron, Zinc, Titanium
Iron, tin
Iron, Brass, Tin
Copper, Tin
From which mineral is radium obtained?

Rutile
Haematite
Limestone
Pitchblende
What is laughing gas?

Nitrous Oxide
Carbon monoxide
Sulphur dioxide
Hydrogen peroxide
Actinides are the elements with atomic numbers from

97 to 104
101 to 115
89 to 103
36 from 43
The two elements that are frequently used for making transistors are

boron and aluminium
silicon and germanium
iridium and tungsten
niobium and columbium
The filament of an electric bulb is made of

tungsten
nichrome
graphite
iron
Diamond is an allotropic form of

germanium
carbon
silicon
sulphur
In fireworks, the green flame is produced because of

sodium
barium
mercury
potassium
Permanent hardness of water can be removed by adding

chlorine
washing soda
potassium permanganate
bleaching powder
Marsh gas is

nitrogen
ethane
methane
hydrogen
LPG consists of mainly

methane, ethane and hexane
ethane, hexane and nonane
methane, hexane and nonane
methane, butane and propane
Air is a/an

compound
element
electrolyte
mixture
Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?

Television
Refrigerator
Tube light
Cooking gas
Balloons are filled with

nitrogen
helium
oxygen
argon
Which of the following does not contain a coinage metal?

Silver and Gold
Zinc and Gold
Copper and Silver
Copper and Gold
Which metal pollute the air of a big city?

Copper
Chromium
Lead
Cadmium
Bell metal is an alloy of

nickel and copper
zinc and copper
brass and nickel
tin and copper
Water is a good solvent of ionic salts because

it has a high specific heat
it has no colour
it has a high dipole moment
it has a high boiling point
Which of the following is not an isotope of hydrogen?

Tritium
Deuterium
Protium
Yttrium
The main constituents of pearls are

calcium oxide and ammonium chloride
calcium carbonate and magnesium carbonate
aragonite and conchiolin
ammonium sulphate and sodium carbonate
Amalgams are

highly coloured alloys
alloys which contain mercury as one of the contents
alloys which have great resistance to abrasion
alloys which contain carbon
Which of the following is the lightest metal?

Mercury
Lithium
Lead
Silver
Which of the following metals remain in liquid for under normal conditions?

Radium
Zinc
Uranium
Mercury
Potassium Permanganate is used for purifying drinking water, because

it is a sterilising agent
it dissolves the impurities of water
it is a reducing agent
it is an oxidising agent
Which of the following substances is a bad conductor of electricity but a good conductor of heat?

Mica
Perspex
Celluloid
Asbestos
Which of the following is an element?

Ruby
Sapphire
Emerald
Diamond