General Science Gk 30 Questios

The term ‘General Science’ refers to the practical aspects of the basic principles of the various branches of Science. Generally, under this subject the questions related to the Concepts of Physics, Chemistry and Biology are asked in the examination the answers of which are expected from any educated person. Around 15 to 16 questions from this subject are asked, which are related to the daily life activities and events.



1.Galvanised iron sheets have a coating of

(a) tin (b) lead (c) zinc (d) chromium


2.Which of the following metals was first discovered by man?

(a) Bronze To s (b) Silver (c) Iron (d) Copper


3.An element that does not occur in nature but can be produced artificially is

(a) thorium (b) radium (C) plutonium (d) uranium


4.The element found on the surface of the moon is

(a) tin (b) tungsten (c) tantalum (d) titanium

Ans.  d

5.The average salinity of sea water isboa

(a) 20% (b) 25% (c) 30% (d) 35 %


6.The metallic constituents of hard water are

(a) magnesium, calcium and tin (b) iron, tin and calcium (C) calcium, magnesium and iron (d) magnesium, tin and iron


7.The high-temperature superconductors are

(a) metel alloys (b) ceramic oxides ) (c) inorganic polymers (d) pure rare earth metals


8.The variety of coal in which the deposit contains recognisable traces of the original plant material is

(a) anthracite (b) lignite (c) peat (d) bitumen


9.The highest grade of coal whose surface is shining and has the highest calorific value, is

(a) Bituminous (b) Lignite (c) Anthracite(d) Peat


10.An atom of an element with mass number 23 and atomic number 11 will have

(a) 11 neutrons, 12 protons and 11 electrons (b) 11 protons, 12 neutrons and 11 electrons (C) 11 neutrons, 11 protons and 12 electrons (d) 23 protons and 11 electrons


11.What are soaps?

(a) Salts of silicates (b) Esters of heavy fatty acids (c) Sodium or potassium salts of heavier fatty acids (d) Mixture of glycerol and alcohols


12.In vulcanisation, natural rubber is heated with

(a) Carbon (b) Sulphur (c) Silicon Er (d)Phosphorus

Ans. b

13.Which of the following is used as a filler in rubber tyres?

(a) Graphite (b) Coal (c) Coke (d) Carbon black and th


14.Which one of the following fertilizers has more nitrogen content?

(a) Urea (b) Ammonium Nitrate (C) Potassium Nitate (d) Ammonium Phosphate


15.Dialysis is used for people with defective kidneys. It involves the process of

(a) adsorption (b) osmosis (c) electrophoresis (d) diffusion


16.The substance coated on plastic tape-recorder tapes is

(a) zinc oxide (b) manganse oxide (c) iron sulphate (d) iron oxide

Ans. d

17.Water is a compound because

(a) it exists as a solid, a liquid or a gas (b) it contains hydrogen and oxygen (c) it contains two different elements joined by chemical bonds (d) it cannot be split up into simpler substances by chemical Means


18.Of the following metals which one used to pollute the air of a big city?

(a) Copper (b) Chromium (c) Lead (d) Cadmium


19.The element present in the largest amount in rocks and minerals is

(a) carbon (b) silicon (C) hydrogen (d) aluminium


20.Which of the following is the lightest metal?

(a) Mercury (b) Silver (c) Lithium (d) Lead

Ans. c

21.The most malleable metal is

(a) Silver (b) Gold (c) Aluminium (d) Sodium

Ans. b

22.Balloons are filled with

(a) helium (b) oxygen (c) nitrogen (d) argon

Ans. a

23.Which of the following is used in beauty parlours for hair setting?

(a) Chlorine (b) Sulphur (C) Phosphorus  (d) Silicon


24.Which of the following is the lightest gas?

(a) Nitrogen (b) Hydrogen (C) Ammonia (d) Carbon dioxide


25.Among the various allotropes of carbon

(a) diamond is the hardest, lamp black is the softest (b) diamond is the hardest, coke is the softest (C) coke is the hardest, graphite is the softest (d) diamond is the hardest, graphite is the softest


26.Which one of the following is the basis of modern periodic table?

(a) Atomic mass (b) Atomic number (C) Atomic size (d) Atomic volume


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

(a) Limestone (b) Gypsum and clay (C) Clay (d) Limestone and clay


28.Glass is made of the mixture of

(a) quartz and mica (b) sand and salt (c) sand and silicates (d) None of these


29.Which one of the following metals has the highest density?

(a) Gold (b) Iron (C) Platinum (d) Lead


30.The quantum theory was first enunciated by

(a) Niel Bohr (b) Albert Einstein (c) Max Planck (d) Max Born


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