Q: Brass gets discoloured in air because of the presence of which of the following gases in air?
A. Oxygen
B. Hydrogen sulphide
C. Carbon dioxide
D. Nitrogen
Q: Which of the following is a non metal that remains liquid at room temperature?
A. Phosphorous
B. Bromine
C. Chlorine
D. Helium
Q: Chlorophyll is a naturally occurring chelate compound in which central metal is
A. copper
B. magnesium
C. iron
D. calcium
Q: Which of the following is used in pencils?
A. Graphite
B. Silicon
C. Charcoal
D. Phosphorous
Q: Which of the following metals forms an amalgam with other metals?
A. Tin
B. Mercury
C. Lead
D. Zinc
Q: Chemical formula for water is
A. NaAlO2
B. H2O
C. Al2O3
D. CaSiO3
Q: The gas usually filled in the electric bulb is
A. nitrogen
B. hydrogen
C. carbon dioxide
D. oxygen
Q: Washing soda is the common name for
A. Sodium carbonate
B. Calcium bicarbonate
C. Sodium bicarbonate
D. Calcium carbonate
Q: 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
Q: Which of the gas is not known as green house gas?
A. Methane
B. Nitrous oxide
C. Carbon dioxide
D. Hydrogen
A. black solid
B. red liquid
C. colourless gas
D. highly inflammable gas
Q: The hardest substance available on earth is
A. Gold
B. Iron
C. Diamond
D. Platinum
A. bitumen
B. anthracite
C. lignite
D. peat
A. pain killer
B. fire extinguisher
C. mosquito repellent
D. petrol additive
Q: Which of the following is used as a lubricant?
A. Graphite
B. Silica
C. Iron Oxide
D. Diamond
A. Argon
B. Xenon
C. Helium
D. Krypton
Q: 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
Q: The property of a substance to absorb moisture from the air on exposure is called
A. osmosis
B. deliquescence
C. efflorescence
D. desiccation
Q: 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
Q: The average salinity of sea water is
A. 3%
B. 3.5%
C. 2.5%
D. 2%
Q: When an iron nail gets rusted, iron oxide is formed
A. without any change in the weight of the nail
B. with decrease in the weight of the nail
C. with increase in the weight of the nail
D. without any change in colour or weight of the nail
Q: Galvanised iron sheets have a coating of
A. lead
B. chromium
C. zinc
D. tin
Q: 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
Q: The group of metals Fe, Co, Ni may best called as
A. transition metals
B. main group metals
C. alkali metals
D. rare metals
A. deuterium oxide
B. PH7
C. rain water
D. tritium oxide
A. bromine
B. fluorine
C. chlorine
D. sulphur
Q: The element common to all acids is
A. hydrogen
B. carbon
C. sulphur
D. oxygen
Q: Non stick cooking utensils are coated with
A. Teflon
B. PVC
C. black paint
D. polystyrene
A. titanium
B. zirconium
C. iron
D. thorium
Q: Carbon, diamond and graphite are together called
A. allotropes
B. isomers
C. isomorphs
D. isotopes
Q: Potassium nitrate is used in
A. medicine
B. fertiliser
C. salt
D. glass
Q: Permanent hardness of water may be removed by the addition of
A. sodium carbonate
B. alum
C. potassium permanganate
D. lime
A. carbonic acid
B. sulphuric acid
C. carbon dioxide
D. nitrous acid
Q: The most important ore of aluminium is
A. galena
B. calamine
C. calcite
D. bauxite
A. camphor
B. sulphur
C. common salt
D. sugar
Q: Which of the following was to be discovered first in the chromospheres of the sun?
A. Krypton
B. Xenon
C. Neon
D. Helium
Q: Which of the following is in liquid form at room temperature?
A. Lithium
B. Sodium
C. Francium
D. Cerium
A. petrol
B. alcohol
C. water
D. kerosene
Q: Which of the following are the ingredients of gun metal?
A. Iron, Zinc, Titanium
B. Iron, tin
C. Iron, Brass, Tin
D. Copper, Tin
Q: From which mineral is radium obtained?
A. Rutile
B. Haematite
C. Limestone
D. Pitchblende
A. Nitrous Oxide
B. Carbon monoxide
C. Sulphur dioxide
D. Hydrogen peroxide
Q: Actinides are the elements with atomic numbers from
A. 97 to 104
B. 101 to 115
C. 89 to 103
D. 36 from 43
Q: The two elements that are frequently used for making transistors are
A. boron and aluminium
B. silicon and germanium
C. iridium and tungsten
D. niobium and columbium
Q: The filament of an electric bulb is made of
A. tungsten
B. nichrome
C. graphite
D. iron
Q: Diamond is an allotropic form of
A. germanium
B. carbon
C. silicon
D. sulphur
Q: In fireworks, the green flame is produced because of
A. sodium
B. barium
C. mercury
D. potassium
Q: Permanent hardness of water can be removed by adding
A. chlorine
B. washing soda
C. potassium permanganate
D. bleaching powder
A. nitrogen
B. ethane
C. methane
D. hydrogen
A. methane, ethane and hexane
B. ethane, hexane and nonane
C. methane, hexane and nonane
D. methane, butane and propane
A. compound
B. element
C. electrolyte
D. mixture
A. Television
B. Refrigerator
C. Tube light
D. Cooking gas
A. nitrogen
B. helium
C. oxygen
D. argon
Q: 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
Q: Which metal pollute the air of a big city?
A. Copper
B. Chromium
C. Lead
D. Cadmium
A. nickel and copper
B. zinc and copper
C. brass and nickel
D. tin and copper
Q: Water is a good solvent of ionic salts because
A. it has a high specific heat
B. it has no colour
C. it has a high dipole moment
D. it has a high boiling point
Q: Which of the following is not an isotope of hydrogen?
A. Tritium
B. Deuterium
C. Protium
D. Yttrium
Q: 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
A. highly coloured alloys
B. alloys which contain mercury as one of the contents
C. alloys which have great resistance to abrasion
D. alloys which contain carbon
Q: Which of the following is the lightest metal?
A. Mercury
B. Lithium
C. Lead
D. Silver
Q: Which of the following metals remain in liquid for under normal conditions?
A. Radium
B. Zinc
C. Uranium
D. Mercury
Q: Potassium Permanganate is used for purifying drinking water, because
A. it is a sterilising agent
B. it dissolves the impurities of water
C. it is a reducing agent
D. it is an oxidising agent
Q: Which of the following is an element?
A. Ruby
B. Sapphire
C. Emerald
D. Diamond
Q: What is the unit for measuring the amplitude of a sound?
A. Decibel
B. Coulomb
C. Hum
D. Cycles
Q: Reading of a barometer going down is an indication of
A. snow
B. storm
C. intense heat
D. rainfall
A. speed of light
B. radio wave frequency
C. intensity of sound
D. intensity of heat
A. 6 feet
B. 6 meters
C. 60 feet
D. 100 cm
A. sound
B. depth
C. frequency
D. distance
Q: Light year is a measurement of
A. speed of aeroplanes
B. speed of light
C. Stellar distances
D. speed of rockets
Q: Very small time intervals are accurately measure by
A. White dwarfs
B. Quartz clocks
C. Atomic clocks
D. Pulsars
Q: One kilometre is equal to how many miles?
A. 0.84
B. 0.5
C. 1.6
D. 0.62
Q: kilohertz is a unit which measures
A. power used by a current of one ampere
B. electromagnetic radio wave frequencies
C. voltage
D. electric resistance
Q: One horse power is equal to
A. 746 watts
B. 748 watts
C. 756 watts
D. 736 watts
A. temperature
B. heat
C. atmospheric pressure
D. current
A. 105 ergs
B. 103 ergs
C. 107 ergs
D. 1011 ergs
Q: Kilowatt is a unit to measure
A. work
B. power
C. electricity
D. current
Q: Electric current is measure by
A. commutator
B. anemometer
C. ammeter
D. voltmeter
A. colour contrast
B. sound waves
C. time
D. water waves
Q: Nautical mile is a unit of distance used in
A. navigation
B. road mile
C. astronomy
D. measuring the boundaries of a nation
Q: Knot is a unit of speed of which of the following?
A. Aeroplane
B. Light waves
C. Ship
D. Sound waves
Q: Which of the following is used as a moderator in nuclear reactor?
A. Thorium
B. Graphite
C. Radium
D. Ordinary water
Q: 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
A. electrons and protons
B. electrons only
C. protons only
D. electrons and nuclei
Q: 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
A. crystallisation
B. sublimation
C. distillation
D. filtration
Q: The wavelength of X-rays is of the order of
A. 10 micron
B. 1 angstrom
C. 1 cm
D. 1 m
A. Laser beam
B. X-rays
C. Gamma rays
D. Cosmic rays
A. Thorium
B. Radium
C. Plutonium
D. Radan
Q: 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
Q: What is the wavelength of visible spectrum?
A. 8500 - 9800 angstrom
B. 7800 - 8000 angstrom
C. 3900 - 7600 angstrom
D. 1300 - 3000 angstrom
Q: Which of the following has a least penetrating power?
A. All have same penetrating power
B. Beta Particles
C. Alpha particles
D. Gamma rays
Q: The isotope of uranium capable of sustaining chain reaction is
A. U-235
B. U-245
C. U-239
D. U-238
Q: 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
Q: Who suggested that most of the mass of the atom is located in the nucleus?
A. Thompson
B. Bohr
C. Rutherford
D. Einstein
Q: 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
Q: In an atomic nucleus, neutrons and protons are held together by
A. gravitational forces
B. exchange forces
C. coulombic forces
D. magnetic forces
Q: 'No two electrons in an atom can have the same set of four quantum numbers' is
A. Newton's law
B. Bohr's law
C. Aufbau principle
D. Pauli's exclusion principle
A. a molecule
B. a cation
C. an anion
D. an atom
Q: Atoms of an element differ from those of all other elements in
A. atomic number and electronic configuration
B. number of neutrons and number of valence electrons
C. atomic number and number of valence electrons
D. number of neutrons and electronic configuration
Q: Nuclear fission is caused by the impact of
A. neutron
B. proton
C. deuteron
D. electron
Q: Which of the following rays are more penetrating?
A. Beta rays
B. Alpha rays
C. Gamma rays
D. X-rays
Q: How many colours the sunlight spectrum has?
A. Three
B. Seven
C. Four
D. Five
Q: Which is/are the important raw material(s) required in cement industry?
A. Gypsum and Clay
B. Clay
C. Limestone and Clay
D. Limestone
Q: Which type of fire extinguisher is used for petroleum fire?
A. Powder type
B. Liquid type
C. Soda acid type
D. Foam type
Q: Which of the following is commonly called a 'polyamide'?
A. Terylene
B. Nylon
C. Rayon
D. Orlon
A. detergents
B. insecticides
C. adhesives
D. moth repellents
Q: Detergents used for cleaning clothes and utensils contain?
A. bicarbonates
B. bismuthates
C. sulphonates
D. nitrates
Q: Which of the following is used for removing air bubbles from glass during its manufacture?
A. Arsenous oxide
B. Potassium carbonate
C. Soda ash
D. Feldspar
Q: Which of the following is a protein?
A. Natural rubber
B. Starch
C. Cellulose
D. None of these
Q: Wood is the main raw material for the manufacture of
A. paint
B. paper
C. ink
D. gun powder
A. cellulose
B. pectin
C. glucose
D. amylase
Q: Optic fibres are mainly used for which of the following?
A. Musical instruments
B. Food industry
C. Weaving
D. Communication
Q: The major ingredient of leather is
A. collagen
B. carbohydrate
C. polymer
D. nucleic acid
A. Salts of silicates
B. Mixture of glycerol and alcohols
C. Sodium or potassium salts of heavier fatty acids
D. Esters of heavy fatty acids
Q: How does common salt help in separating soap from the solution after saponification?
A. By decreasing density of Soap
B. By decreasing solubility of Soap
C. By increasing density of Soap
D. By increasing solubility of Soap
Q: In vulcanisation, natural rubber is heated with
A. Carbon
B. Silicon
C. Sulphur
D. Phosphorous
Q: Deep blue colour is imparted to glass by the presence of
A. cupric oxide
B. nickel oxide
C. cobalt oxide
D. iron oxide
Q: Glass is made of the mixture of
A. quartz and mica
B. sand and silicates
C. salt and quartz
D. sand and salt
Q: The vast resources of unutilised natural gas can be used in the production of
A. graphite
B. Synthetic petroleum
C. fertilisers
D. carbide
A. Wood and resin
B. Wood, sodium and bleaching powder
C. Wood, calcium, hydrogen sulphite and resin
D. Wood and bleaching powder
Q: Gypsum is added to cement clinker to
A. increase the tensile strength of cement
B. decrease the rate of setting of cement
C. facilitate the formation of colloidal gel
D. bind the particles of calcium silicate
Q: Soap is a mixture of sodium or potassium salts of
A. dicarboxylic acids
B. monocarboxylic acids
C. glycerol
D. tricarboxylic acids
Q: The type of glass used in making lenses and prisms is
A. jena glass
B. soft glass
C. pyrex glass
D. flint glass
Q: Which one of the following is the petroleum wax?
A. Paraffin wax
B. Jonoba wax
C. Carnauba wax
D. Bees wax