Science General Knowledge (GK) Questions with Answers

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Science General Knowledge Questions with Answers

*Tetraethyl lead is used as
A.pain killer
B.fire extinguisher
C.mosquito repellent
D.petrol additive
Ans:    petrol additive
*Which of the following is used as a lubricant?
A.Graphite
B.Silica
C.Iron Oxide
D.Diamond
Ans: Graphite
*The gas usually filled in the electric bulb is
A.nitrogen
B.hydrogen
C.carbon dioxide
D.oxygen
Ans: Nitrogen
*Washing soda is the common name for
A.Sodium carbonate
B.Calcium bicarbonate
C.Sodium bicarbonate
D.Calcium carbonate
Ans: Sodium carbonate
*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
Ans:silicon dioxide
*Which of the gas is not known as green house gas?
A.Methane
B.Nitrous oxide
C.Carbon dioxide
D.Hydrogen
Ans:Hydrogen
*Bromine is a
A.black solid
B.red liquid
C.colourless gas
D.highly inflammable gas
Ans:red liquid
*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
Ans:Hydrogen sulphide
*Which of the following is used in pencils?
A.Graphite
B.Silicon
C.Charcoal
D.Phosphorous
Ans:Graphite
*Which of the following metals forms an amalgam with other metals?
A.Tin
B.Mercury
C.Lead
D.Zinc
Ans:Mercury
*The group of metals Fe, Co, Ni may best called as
A.transition metals
B.main group metals
C.alkali metals
D.rare metals
Ans:transition metals
*Heavy water is
A.deuterium oxide
B.PH7
C.rain water
D.tritium oxide
Ans:deuterium oxide
*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
Ans:cutting very hard substances
*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
Ans:with increase in the weight of the nail
*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
Ans:oxygen and acetylene
*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
Ans:diamond is the hardest, graphite is the softest
*What is laughing gas?
A.Nitrous Oxide
B.Carbon monoxide
C.Sulphur dioxide
D.Hydrogen peroxide
Ans:Nitrous Oxide
*Actinides are the elements with atomic numbers from
A.97 to 104
B.101 to 115
C.89 to 103
D.36 from 43
Ans:89 to 103
*Soda water contains
A.carbonic acid
B.sulphuric acid
C.carbon dioxide
D.nitrous acid
Ans:    carbon dioxide
*Non stick cooking utensils are coated with
A.Teflon
B.PVC
C.black paint
D.polystyrene
Ans:Teflon
*Carbon, diamond and graphite are together called
A.allotropes
B.isomers
C.isomorphs
D.isotopes
Ans:allotropes
*Most soluble in water is
A.camphor
B.sulphur
C.common salt
D.sugar
Ans:sugar
*Permanent hardness of water may be removed by the addition of
A.sodium carbonate
B.alum
C.potassium permanganate
D.lime
Ans:sodium carbonate
*From which mineral is radium obtained?
A.Rutile
B.Haematite
C.Limestone
D.Pitchblende
Ans: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
Ans:Copper, Tin
*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
Ans:silicon and germanium
*Diamond is an allotropic form of
A.germanium
B.carbon
C.silicon
D.sulphur
Ans:carbon
*Permanent hardness of water can be removed by adding
A.chlorine
B.washing soda
C.potassium permanganate
D.bleaching powder
Ans:washing soda
*LPG consists of mainly
A.methane, ethane and hexane
B.ethane, hexane and nonane
C.methane, hexane and nonane
D.methane, butane and propane
Ans:methane, butane and propane
*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
Ans:Refrigerator
*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
Ans: Zinc and Gold
*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
Ans: calcium carbonate and magnesium carbonate
*Amalgams are
A.highly colored alloys
B.alloys which contain mercury as one of the contents
C.alloys which have great resistance to abrasion
D.alloys which contain carbon
Ans: alloys which contain mercury as one of the contents
*Bell metal is an alloy of
A.nickel and copper
B.zinc and copper
C.brass and nickel
D.tin and copper
Ans: tin and copper
*Water is a good solvent of ionic salts because
A.it has a high specific heat
B.it has no color
C.it has a high dipole moment
D.it has a high boiling point
Ans: it has a high dipole moment

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