Practice MCQ General Science

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4246 Which of the following is a non metal that remains liquid at room temperature?
Options:Phosphorous,    Bromine,    Chlorine,    Helium

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4247 Chlorophyll is a naturally occurring chelate compound in which central metal is
Options:copper,    magnesium,    iron,    calcium

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4248 Which of the following is used in pencils?
Options:Graphite,    Silicon,    Charcoal,    Phosphorous

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4249 Which of the following metals forms an amalgam with other metals?
Options:Tin,    Mercury,    Lead,    Zinc

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4250 Chemical formula for water is
Options:NaAlO2,    H2O,    Al2O3,    CaSiO3

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4251 The gas usually filled in the electric bulb is
Options:nitrogen,    hydrogen,    carbon dioxide,    oxygen

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4252 Washing soda is the common name for
Options:Sodium carbonate,    Calcium bicarbonate,    Sodium bicarbonate,    Calcium carbonate

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4253 Quartz crystals normally used in quartz clocks etc. is chemically
Options:silicon dioxide,    germanium oxide,    a mixture of germanium oxide and silicon dioxide,    sodium silicate

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4254 Which of the gas is not known as green house gas?
Options:Methane,    Nitrous oxide,    Carbon dioxide,    Hydrogen

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4255 Bromine is a
Options:black solid,    red liquid,    colourless gas,    highly inflammable gas

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4256 The hardest substance available on earth is
Options:Gold,    Iron,    Diamond,    Platinum

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4257 The variety of coal in which the deposit contains recognisable traces of the original plant material is
Options:bitumen,    anthracite,    lignite,    peat

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4258 Tetraethyl lead is used as
Options:pain killer,    fire extinguisher,    mosquito repellent,    petrol additive

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4259 Which of the following is used as a lubricant?
Options:Graphite,    Silica,    Iron Oxide,    Diamond

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4260 The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
Options:Argon,    Xenon,    Helium,    Krypton

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4261 The gases used in different types of welding would include
Options:oxygen and hydrogen,    oxygen, hydrogen, acetylene and nitrogen,    oxygen, acetylene and argon,    oxygen and acetylene

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4262 The property of a substance to absorb moisture from the air on exposure is called
Options:osmosis,    deliquescence,    efflorescence,    desiccation

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4263 In which of the following activities silicon carbide is used?
Options:Making cement and glass,    Disinfecting water of ponds,    cutting very hard substances,    Making casts for statues

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4264 The average salinity of sea water is
Options:3%,    3.5%,    2.5%,    2%

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4265 When an iron nail gets rusted, iron oxide is formed
Options: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

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4266 Galvanised iron sheets have a coating of
Options:lead,    chromium,    zinc,    tin

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4267 Among the various allotropes of carbon,
Options: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

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4268 The group of metals Fe, Co, Ni may best called as
Options:transition metals,    main group metals,    alkali metals,    rare metals

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4269 Heavy water is
Options:deuterium oxide,    PH7,    rain water,    tritium oxide

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4270 The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
Options:bromine,    fluorine,    chlorine,    sulphur

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4271 The element common to all acids is
Options:hydrogen,    carbon,    sulphur,    oxygen

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4272 Non stick cooking utensils are coated with
Options:Teflon,    PVC,    black paint,    polystyrene

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4273 Monazite is an ore of
Options:titanium,    zirconium,    iron,    thorium

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4274 Carbon, diamond and graphite are together called
Options:allotropes,    isomers,    isomorphs,    isotopes

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4275 Potassium nitrate is used in
Options:medicine,    fertiliser,    salt,    glass

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4276 Permanent hardness of water may be removed by the addition of
Options:sodium carbonate,    alum,    potassium permanganate,    lime

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4277 Soda water contains
Options:carbonic acid,    sulphuric acid,    carbon dioxide,    nitrous acid

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4278 Most soluble in water is
Options:camphor,    sulphur,    common salt,    sugar

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4279 Which of the following was to be discovered first in the chromospheres of the sun?
Options:Krypton,    Xenon,    Neon,    Helium

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4280 Which of the following is in liquid form at room temperature?
Options:Lithium,    Sodium,    Francium,    Cerium

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4281 Sodium metal is kept under
Options:petrol,    alcohol,    water,    kerosene

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4282 Which of the following are the ingredients of gun metal?
Options:Iron, Zinc, Titanium,    Iron, tin,    Iron, Brass, Tin,    Copper, Tin

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4283 From which mineral is radium obtained?
Options:Rutile,    Haematite,    Limestone,    Pitchblende

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4284 What is laughing gas?
Options:Nitrous Oxide,    Carbon monoxide,    Sulphur dioxide,    Hydrogen peroxide

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4285 Actinides are the elements with atomic numbers from
Options:97 to 104,    101 to 115,    89 to 103,    36 from 43

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4286 The two elements that are frequently used for making transistors are
Options:boron and aluminium,    silicon and germanium,    iridium and tungsten,    niobium and columbium

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4287 The filament of an electric bulb is made of
Options:tungsten,    nichrome,    graphite,    iron

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4288 Diamond is an allotropic form of
Options:germanium,    carbon,    silicon,    sulphur

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4289 In fireworks, the green flame is produced because of
Options:sodium,    barium,    mercury,    potassium

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4290 Permanent hardness of water can be removed by adding
Options:chlorine,    washing soda,    potassium permanganate,    bleaching powder

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4291 Marsh gas is
Options:nitrogen,    ethane,    methane,    hydrogen

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4292 LPG consists of mainly
Options:methane, ethane and hexane,    ethane, hexane and nonane,    methane, hexane and nonane,    methane, butane and propane

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4293 Air is a/an
Options:compound,    element,    electrolyte,    mixture

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4294 Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
Options:Television,    Refrigerator,    Tube light,    Cooking gas

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4295 Balloons are filled with
Options:nitrogen,    helium,    oxygen,    argon

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