General Knowledge :: General Science

Which of the gas is not known as green house gas?   A. Methane B. Nitrous oxide C. Carbon dioxide D. Hydrogen 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 Washing soda is the common name for   A. Sodium carbonate B. Calcium bicarbonate C. Sodium bicarbonate D. Calcium carbonate The gas usually filled in the electric bulb is   A. nitrogen B. hydrogen C. carbon dioxide D. oxygen Chemical formula for water is   A. NaA1O2 B. H2O C. Al2O3 D. CaSiO3 Which of the following metals forms an amalgam with other metals?   A. Tin B. Mercury C. Lead D. Zinc Which of the following is used in pencils?   A. Graphite B. Silicon C. Charcoal D. Phosphorous Chlorophyll is a naturally occurring chelate compound in which central metal is   A. copper B. magnesium C. iron D. calcium Which of the following is a non metal that remains liquid at room temperature?   A. Phosphorous B. Bromine C. Chlorine D. Helium 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 Which of the following is an element?   A. Ruby B. Sapphire C. Emerald D. Diamond 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 Which of the following metals remain in liquid for under normal conditions?   A. Radium B. Zinc C. Uranium D. Mercury Which of the following is the lightest metal? A. Mercury B. Lithium C. Lead D. Silver Amalgams are 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 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 Which of the following is not an isotope of hydrogen? A. Tritium B. Deuterium C. Protium D. Yttrium 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 Bell metal is an alloy of A. nickel and copper B. zinc and copper C. brass and nickel D. tin and copper Which metal pollute the air of a big city? A. Copper B. Chromium C. Lead D. Cadmium 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 Balloons are filled with A. nitrogen B. helium C. oxygen D. argon Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products? A. Television B. Refrigerator C. Tube light D. Cooking gas Air is a/an A. compound B. element C. electrolyte D. mixture LPG consists of mainly A. methane, ethane and hexane B. ethane, hexane and nonane C. methane, hexane and nonane D. methane, butane and propane Marsh gas is A. nitrogen B. ethane C. methane D. hydrogen Permanent hardness of water can be removed by adding A. chlorine B. washing soda C. potassium permanganate D. bleaching powder In fireworks, the green flame is produced because of A. sodium B. barium C. mercury D. potassium Diamond is an allotropic form of A. germanium B. carbon C. silicon D. sulphur The filament of an electric bulb is made of A. tungsten B. nichrome C. graphite D. iron 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 Actinides are the elements with atomic numbers from A. 97 to 104 B. 101 to 115 C. 89 to 103 D. 36 from 43 What is laughing gas? A. Nitrous Oxide B. Carbon monoxide C. Sulphur dioxide D. Hydrogen peroxide From which mineral is radium obtained? A. Rutile B. Haematite C. Limestone D. Pitchblende     Which of the following are the ingredients of gun metal? A. Iron, Zinc, Titanium B. Iron, tin C. Iron, Brass, Tin D. Copper, Tin     Sodium metal is kept under A. petrol B. alcohol C. water D. kerosene     Which of the following is in liquid form at room temperature? A. Lithium B. Sodium C. Francium D. Cerium     Which of the following was to be discovered first in the chromospheres of the sun? A. Krypton B. Xenon C. Neon D. Helium     Most soluble in water is A. camphor B. sulphur C. common salt D. sugar     The most important ore of aluminium is A. galena B. calamine C. calcite D. bauxite     Soda water contains A. carbonic acid B. sulphuric acid C. carbon dioxide D. nitrous acid     Permanent hardness of water may be removed by the addition of A. sodium carbonate B. alum C. potassium permanganate D. lime     Potassium nitrate is used in A. medicine B. fertiliser C. salt D. glass     Carbon, diamond and graphite are together called A. allotropes B. isomers C. isomorphs D. isotopes     Monazite is an ore of A. titanium B. zirconium C. iron D. thorium     Non stick cooking utensils are coated with A. Teflon B. PVC C. black paint D. polystyrene     The element common to all acids is A. hydrogen B. carbon C. sulphur D. oxygen     The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of A. bromine B. fluorine C. chlorine D. sulphur     Heavy water is A. deuterium oxide B. PH7 C. rain water D. tritium oxide     The group of metals Fe, Co, Ni may best called as A. transition metals B. main group metals C. alkali metals D. rare metals     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     Galvanised iron sheets have a coating of A. lead B. chromium C. zinc D. tin     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     The average salinity of sea water is A. 3% B. 3.5% C. 2.5% D. 2%     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     The property of a substance to absorb moisture from the air on exposure is called A. osmosis B. deliquescence C. efflorescence D. desiccation     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     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     Which of the following is used as a lubricant? A. Graphite B. Silica C. Iron Oxide D. Diamond     Tetraethyl lead is used as A. pain killer B. fire extinguisher C. mosquito repellent D. petrol additive     The variety of coal in which the deposit contains recognisable traces of the original plant material is A. bitumen B. anthracite C. lignite D. peat     The hardest substance available on earth is A. Gold B. Iron C. Diamond D. Platinum     Bromine is a A. black solid B. red liquid C. colourless gas D. highly inflammable gas     Which of the gas is not known as green house gas? A. Methane B. Nitrous oxide C. Carbon dioxide D. Hydrogen     Quartz crystals normally used in quartz clocks etc. is chemically A.a silicon dioxide B. germanium oxide C. a mixture of germanium oxide and silicon dioxide D. sodium silicate     Washing soda is the common name for A. Sodium carbonate B. Calcium bicarbonate C. Sodium bicarbonate D. Calcium carbonate     The gas usually filled in the electric bulb is A. nitrogen B. hydrogen C. carbon dioxide D. oxygen     Chemical formula for water is A. NaA1O2 B. H2O C. Al2O3 D. CaSiO3     Which of the following metals forms an amalgam with other metals? A. Tin B. Mercury C. Lead D. Zinc     Which of the following is used in pencils? A. Graphite B. Silicon C. Charcoal D. Phosphorous     Chlorophyll is a naturally occurring chelate compound in which central metal is A. copper B. magnesium C. iron D. calcium     Which of the following is a non metal that remains liquid at room temperature? A. Phosphorous B. Bromine C. Chlorine D. Helium     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