General Science Questions

Objective Question on General Science

  • Q.1 Which of the following metals forms an amalgam with other metals?


    2) Zinc

    3) Lead

    4) Tin

    View Answer
  • Q.2 Which of the following is a non metal that remains liquid at room temperature?


    2) Chlorine

    3) Phosphorous

    4) Bromine

    View Answer
  • Q.3 Brass gets discoloured in air because of the presence of which of the following gases in air?


    2) Carbon dioxide

    3) Hydrogen sulphide

    4) Oxygen

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  • Q.4 Which of the following is used in pencils?


    2) Graphite

    3) Phosphorous

    4) Charcoal

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  • Q.5 Chlorophyll is a naturally occurring chelate compound in which central metal is


    2) iron

    3) magnesium

    4) copper

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  • Q.6 Decibel is the unit for

    1)intensity of sound

    2) speed of light

    3) intensity of heat

    4) radio wave frequency

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  • Q.7 Fathom is the unit of


    2) depth

    3) frequency

    4) sound

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  • Q.8 What is the unit for measuring the amplitude of a sound?


    2) Hum

    3) Coulomb

    4) Decibel

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  • Q.9 One fathom is equal to

    1)60 feet

    2) 100 cm

    3) 6 feet

    4) 6 meters

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  • Q.10 Reading of a barometer going down is an indication of


    2) intense heat

    3) rainfall

    4) snow

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  • Q.11 Isotopes are separated by


    2) filtration

    3) sublimation

    4) crystallisation

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  • Q.12 Which of the following is used as a moderator in nuclear reactor?

    1)Ordinary water

    2) Graphite

    3) Thorium

    4) Radium

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  • Q.13 Atoms are composed of

    1)protons only

    2) electrons and protons

    3) electrons and nuclei

    4) electrons only

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  • Q.14 In an atomic explosion, enormous energy is released which is due to

    1)conversion of mass into energy

    2) conversion of chemical energy into heat energy

    3) conversion of neutrons into protons

    4) conversion of mechanical energy into nuclear energy

    View Answer
  • Q.15 Which among the following is a positively charged particle emitted by a radioactive element?

    1)Gamma ray

    2) Cathode ray

    3) Beta ray

    4) Alpha ray

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  • Q.16 Which of the following is commonly called a 'polyamide'?


    2) Rayon

    3) Nylon

    4) Terylene

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  • Q.17 Detergents used for cleaning clothes and utensils contain?


    2) nitrates

    3) bismuthates

    4) bicarbonates

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  • Q.18 Which is/are the important raw material(s) required in cement industry?


    2) Clay

    3) Gypsum and Clay

    4) Limestone and Clay

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  • Q.19 Epoxy resins are used as

    1)moth repellents

    2) adhesives

    3) insecticides

    4) detergents

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  • Q.20 Which type of fire extinguisher is used for petroleum fire?

    1)Foam type

    2) Powder type

    3) Liquid type

    4) Soda acid type

    View Answer
  • Q.21 Potassium Permanganate is used for purifying drinking water, because

    1)it dissolves the impurities of water

    2) it is a sterilising agent

    3) it is an oxidising agent

    4) it is a sterilising agent

    View Answer
  • Q.22 Which of the following is an element?


    2) Emerald

    3) Sapphire

    4) Ruby

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  • Q.23 Which of the following metals remain in liquid for under normal conditions?


    2) Uranium

    3) Radium

    4) Mercury

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  • Q.24 The main constituents of pearls are

    1)ammonium sulphate and sodium carbonate

    2) calcium carbonate and magnesium carbonate

    3) calcium oxide and ammonium chloride

    4) aragonite and conchiolin

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  • Q.25 Water is a good solvent of ionic salts because

    1)it has a high dipole moment

    2) it has a high boiling point

    3) it has no colour

    4) it has a high specific heat

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  • Q.26 Which of the following is the lightest metal?


    2) Silver

    3) Mercury

    4) Lead

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  • Q.27 Which of the following is not an isotope of hydrogen?


    2) Tritium

    3) Deuterium

    4) Protium

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  • Q.28 Amalgams are

    1)alloys which contain carbon

    2) highly coloured alloys

    3) alloys which contain mercury as one of the contents

    4) alloys which have great resistance to abrasion

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  • Q.29 Knot is a unit of speed of which of the following?


    2) Aeroplane

    3) Sound waves

    4) Light waves

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  • Q.30 Nautical mile is a unit of distance used in

    1)road mile

    2) measuring the boundaries of a nation

    3) navigation

    4) astronomy

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  • Q.31 Kilowatt is a unit to measure


    2) electricity

    3) work

    4) power

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  • Q.32 A chronometer measures

    1)water waves

    2) sound waves

    3) colour contrast

    4) time

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  • Q.33 'Bar' is the unit of

    1)atmospheric pressure

    2) current

    3) heat

    4) temperature

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  • Q.34 Electric current is measure by


    2) ammeter

    3) anemometer

    4) commutator

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  • Q.35 One Joule is equal to

    1)105 ergs

    2) 103 ergs

    3) 107 ergs

    4) 1011 ergs

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  • Q.36 One kilometre is equal to how many miles?


    2) 1.6

    3) 0.84

    4) 0.62

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  • Q.37 One horse power is equal to

    1)736 watts

    2) 756 watts

    3) 746 watts

    4) 748 watts

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  • Q.38 Light year is a measurement of

    1)speed of light

    2) speed of rockets

    3) speed of aeroplanes

    4) Stellar distances

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  • Q.39 kilohertz is a unit which measures

    1)electric resistance

    2) electromagnetic radio wave frequencies

    3) power used by a current of one ampere

    4) voltage

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  • Q.40 Very small time intervals are accurately measure by

    1)Atomic clocks

    2) Pulsars

    3) Quartz clocks

    4) White dwarfs

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  • Q.41 How many colours the sunlight spectrum has?


    2) 4

    3) 7

    4) 5

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  • Q.42 Which of the following rays are more penetrating?

    1)Alpha rays

    2) Beta rays

    3) X-rays

    4) Gamma rays

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  • Q.43 According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .

    1)a molecule

    2) an atom

    3) a cation

    4) an anion

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  • Q.44 Nuclear fission is caused by the impact of


    2) electron

    3) neutron

    4) deuteron

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  • Q.45 In an atomic nucleus, neutrons and protons are held together by

    1)magnetic forces

    2) exchange forces

    3) coulombic forces

    4) gravitational forces

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  • Q.46 Atoms of an element differ from those of all other elements in

    1)number of neutrons and electronic configuration

    2) atomic number and number of valence electrons

    3) number of neutrons and number of valence electrons

    4) atomic number and electronic configuration

    View Answer
  • Q.47 'No two electrons in an atom can have the same set of four quantum numbers' is

    1)Bohr's law

    2) Aufbau principle

    3) Pauli's exclusion principle

    4) Newton's law

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  • Q.48 The type of glass used in making lenses and prisms is

    1)flint glass

    2) jena glass

    3) soft glass

    4) pyrex glass

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  • Q.49 Which one of the following is the petroleum wax?

    1)Bees wax

    2) Carnauba wax

    3) Paraffin wax

    4) Jonoba wax

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  • Q.50 The dark lines in the solar spectrum are due to

    1)absence of corresponding wavelengths from the light emitted by the core of the sun

    2) absorption of corresponding wavelengths by the outer layers of the sun

    3) absorption of corresponding wavelengths by the prism used in the photograph

    4) destructive interference between waves of certain definite wavelengths

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  • Q.51 Which of the following has a least penetrating power?

    1)Gamma rays

    2) All have same penetrating power

    3) Beta Particles

    4) Alpha particles

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  • Q.52 Who suggested that most of the mass of the atom is located in the nucleus?


    2) Rutherford

    3) Bohr

    4) Thompson

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  • Q.53 The isotope of uranium capable of sustaining chain reaction is


    2) U-245

    3) U-239

    4) U-238

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  • Q.54 The age of most ancient geological formations is estimated by

    1)Potassium - argon method

    2) C14 method

    3) Ra - Si method

    4) Uranium - lead method

    View Answer
  • Q.55 Glass is made of the mixture of

    1)sand and salt

    2) quartz and mica

    3) sand and silicates

    4) salt and quartz

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  • Q.56 Soap is a mixture of sodium or potassium salts of


    2) monocarboxylic acids

    3) tricarboxylic acids

    4) dicarboxylic acids

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  • Q.57 The vast resources of unutilised natural gas can be used in the production of


    2) carbide

    3) Synthetic petroleum

    4) graphite

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  • Q.58 Gypsum is added to cement clinker to

    1)bind the particles of calcium silicate

    2) facilitate the formation of colloidal gel

    3) increase the tensile strength of cement

    4) decrease the rate of setting of cement

    View Answer
  • Q.59 Paper is manufactured by

    1)Wood, calcium, hydrogen sulphite and resin

    2) Wood and resin

    3) Wood and bleaching powder

    4) Wood, sodium and bleaching powder

    View Answer
  • Q.60 What is the wavelength of visible spectrum?

    1)1300 - 3000 angstrom

    2) 3900 - 7600 angstrom

    3) 8500 - 9800 angstrom

    4) 7800 - 8000 angstrom

    View Answer
  • Q.61 The wavelength of X-rays is of the order of

    1)1 m

    2) 1 cm

    3) 1 angstrom

    4) 10 micron

    View Answer
  • Q.62 Which of the following shows the masses of the three elementary particles in decreasing order?

    1)Leptons, Mesons Baryons

    2) Leptons, Baryons, Mesons

    3) Mesons, Baryons, Leptons

    4) Baryons, Mesons, Leptons

    View Answer
  • Q.63 Mesons are found in

    1)Cosmic rays

    2) Laser beam

    3) X-rays

    4) Gamma rays

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  • Q.64 Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?


    2) Radium

    3) Plutonium

    4) Radan

    View Answer
  • Q.65 Optic fibres are mainly used for which of the following?

    1)Food industry

    2) Weaving

    3) Musical instruments

    4) Communication

    View Answer
  • Q.66 Which of the following is used for removing air bubbles from glass during its manufacture?


    2) Soda ash

    3) Arsenous oxide

    4) Potassium carbonate

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  • Q.67 Rayon is chemically


    2) cellulose

    3) amylase

    4) glucose

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  • Q.68 Which of the following is a protein?

    1)Natural rubber

    2) Cellulose

    3) Starch

    4) None of these

    View Answer
  • Q.69 Wood is the main raw material for the manufacture of

    1)gun powder

    2) ink

    3) paper

    4) paint

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  • Q.70 The major ingredient of leather is


    2) collagen

    3) nucleic acid

    4) polymer

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  • Q.71 Deep blue colour is imparted to glass by the presence of

    1)iron oxide

    2) cupric oxide

    3) nickel oxide

    4) cobalt oxide

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  • Q.72 What are the soaps?

    1)Esters of heavy fatty acids

    2) Sodium or potassium salts of heavier fatty acids

    3) Mixture of glycerol and alcohols

    4) Salts of silicates

    View Answer
  • Q.73 In vulcanisation, natural rubber is heated with


    2) Phosphorous

    3) Carbon

    4) Silicon

    View Answer
  • Q.74 How does common salt help in separating soap from the solution after saponification?

    1)By increasing solubility of Soap

    2) By increasing density of Soap

    3) By decreasing solubility of Soap

    4) By decreasing density of Soap

    View Answer
  • Q.75 Chemical formula for water is


    2) H2O

    3) NaAlO2

    4) Al2O3

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  • Q.76 Which of the gas is not known as green house gas?


    2) Methane

    3) Nitrous oxide

    4) Carbon dioxide

    View Answer
  • Q.77 The gas usually filled in the electric bulb is


    2) carbon dioxide

    3) hydrogen

    4) nitrogen

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  • Q.78 Quartz crystals normally used in quartz clocks etc. is chemically

    1)a mixture of germanium oxide and silicon dioxide

    2) sodium silicate

    3) silicon dioxide

    4) germanium oxide

    View Answer
  • Q.79 Washing soda is the common name for

    1)Sodium carbonate

    2) Calcium carbonate

    3) Sodium bicarbonate

    4) Calcium bicarbonate

    View Answer
  • Q.80 Bell metal is an alloy of

    1)brass and nickel

    2) zinc and copper

    3) tin and copper

    4) nickel and copper

    View Answer
  • Q.81 Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?

    1)Tube light

    2) Cooking gas

    3) Television

    4) Refrigerator

    View Answer
  • Q.82 Which metal pollute the air of a big city?


    2) Lead

    3) Chromium

    4) Copper

    View Answer
  • Q.83 Balloons are filled with


    2) helium

    3) nitrogen

    4) oxygen

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  • Q.84 Which of the following does not contain a coinage metal?

    1)Zinc and Gold

    2) Copper and Gold

    3) Silver and Gold

    4) Copper and Silver

    View Answer
  • Q.85 Bromine is a

    1)highly inflammable gas

    2) colourless gas

    3) red liquid

    4) black solid

    View Answer
  • Q.86 Which of the following is used as a lubricant?

    1)Iron Oxide

    2) Diamond

    3) Graphite

    4) Silica

    View Answer
  • Q.87 The hardest substance available on earth is


    2) Gold

    3) Platinum

    4) Iron

    View Answer
  • Q.88 Tetraethyl lead is used as

    1)mosquito repellent

    2) petrol additive

    3) fire extinguisher

    4) pain killer

    View Answer
  • Q.89 The variety of coal in which the deposit contains recognisable traces of the original plant material is


    2) anthracite

    3) lignite

    4) peat

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  • Q.90 Marsh gas is


    2) methane

    3) ethane

    4) nitrogen

    View Answer
  • Q.91 Air is a/an


    2) compound

    3) mixture

    4) element

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  • Q.92 LPG consists of mainly

    1)methane, butane and propane

    2) methane, hexane and nonane

    3) ethane, hexane and nonane

    4) methane, ethane and hexane

    View Answer
  • Q.93 In fireworks, the green flame is produced because of


    2) mercury

    3) sodium

    4) barium

    View Answer
  • Q.94 Permanent hardness of water can be removed by adding

    1)potassium permanganate

    2) washing soda

    3) bleaching powder

    4) chlorine

    View Answer
  • Q.95 The average salinity of sea water is


    2) 2.50%

    3) 3.50%

    4) 3%

    View Answer
  • Q.96 The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is


    2) Krypton

    3) Helium

    4) Argon

    View Answer
  • Q.97 In which of the following activities silicon carbide is used?

    1)cutting very hard substances

    2) Making casts for statues

    3) Disinfecting water of ponds

    4) Making cement and glass

    View Answer
  • Q.98 The gases used in different types of welding would include

    1)oxygen, acetylene and argon

    2) oxygen and acetylene

    3) oxygen and hydrogen

    4) oxygen, hydrogen, acetylene and nitrogen

    View Answer
  • Q.99 The property of a substance to absorb moisture from the air on exposure is called


    2) desiccation

    3) osmosis

    4) deliquescence

    View Answer
  • Q.100 What is laughing gas?

    1)Hydrogen peroxide

    2) Carbon monoxide

    3) Nitrous Oxide

    4) Sulphur dioxide

    View Answer
  • Q.101 Diamond is an allotropic form of


    2) sulphur

    3) germanium

    4) silicon

    View Answer
  • Q.102 Actinides are the elements with atomic numbers from

    1)36 from 43

    2) 97 to 104

    3) 101 to 115

    4) 89 to 103

    View Answer
  • Q.103 The filament of an electric bulb is made of


    2) tungsten

    3) nichrome

    4) graphite

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  • Q.104 The two elements that are frequently used for making transistors are

    1)niobium and columbium

    2) iridium and tungsten

    3) silicon and germanium

    4) boron and aluminium

    View Answer
  • Q.105 Heavy water is

    1)deuterium oxide

    2) tritium oxide

    3) PH7

    4) rain water

    View Answer
  • Q.106 When an iron nail gets rusted, iron oxide is formed

    1)without any change in colour or weight of the nail

    2) with increase in the weight of the nail

    3) without any change in the weight of the nail

    4) with decrease in the weight of the nail

    View Answer
  • Q.107 The group of metals Fe, Co, Ni may best called as

    1)rare metals

    2) alkali metals

    3) transition metals

    4) main group metals

    View Answer
  • Q.108 Galvanised iron sheets have a coating of


    2) lead

    3) tin

    4) zinc

    View Answer
  • Q.109 Among the various allotropes of carbon,

    1)coke is the hardest, graphite is the softest

    2) diamond is the hardest, coke is the softest

    3) diamond is the hardest, graphite is the softest

    4) diamond is the hardest, lamp black is the softest

    View Answer
  • Q.110 From which mineral is radium obtained?


    2) Pitchblende

    3) Haematite

    4) Rutile

    View Answer
  • Q.111 Which of the following was to be discovered first in the chromospheres of the sun?


    2) Xenon

    3) Krypton

    4) Neon

    View Answer
  • Q.112 Which of the following are the ingredients of gun metal?

    1)Iron, Zinc, Titanium

    2) Iron, tin

    3) Iron, Brass, Tin

    4) Copper, Tin

    View Answer
  • Q.113 Which of the following is in liquid form at room temperature?


    2) Francium

    3) Sodium

    4) Lithium

    View Answer
  • Q.114 Sodium metal is kept under


    2) petrol

    3) kerosene

    4) water

    View Answer
  • Q.115 Carbon, diamond and graphite are together called


    2) isomorphs

    3) isomers

    4) allotropes

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  • Q.116 The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of


    2) chlorine

    3) fluorine

    4) bromine

    View Answer
  • Q.117 Monazite is an ore of


    2) titanium

    3) thorium

    4) zirconium

    View Answer
  • Q.118 The element common to all acids is


    2) hydrogen

    3) carbon

    4) sulphur

    View Answer
  • Q.119 Non stick cooking utensils are coated with


    2) black paint

    3) PVC

    4) Teflon

    View Answer
  • Q.120 potassium nitrate is used in


    2) fertiliser

    3) salt

    4) glass

    View Answer
  • Q.121 Permanent hardness of water may be removed by the addition of

    1)sodium carbonate

    2) alum

    3) potassium permanganate

    4) lime

    View Answer
  • Q.122 Soda water contains

    1)carbonic acid

    2) sulphuric acid

    3) carbon dioxide

    4) nitrous acid

    View Answer
  • Q.123 The most important ore of aluminium is


    2) calamine

    3) calcite

    4) bauxite

    View Answer
  • Q.124 Most soluble in water is


    2) sulphur

    3) common salt

    4) sugar

    View Answer
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