General Science - Chemistry MCQ's




All Questions are from Year - 2018 or older

Question 31 :
Fermentation of milk to curd is due to :

  1. Mycobacterium
  2. Staphylococcus
  3. Lactobacillus
  4. Yeasts
  

Question 32 :
Copper is refined by

  1. roasting
  2. oxidation
  3. electrolysis
  4. zone refining
  

Question 33 :
Which of the following is a renewable source of energy ?

  1. Coal
  2. Geothermal powder
  3. Natural gas
  4. Uranium
  

Question 34 :
The chemical bahaviour of an atom depends upon

  1. the number of protons in its nucleus
  2. the number of neutrons in the nucleus
  3. the number of electrons orbiting around the nucleus
  4. the number of nucleons in the nucleus
  

Question 35 :
Who developed atom bomb ?

  1. Warner Wan Brown
  2. J. Robert Open heimer
  3. Edward Taylor
  4. Samuel Koehen
  

Question 36 :
The common refrigerant in domestic refrigerator is

  1. Neon
  2. Oxygen
  3. Nitrogen
  4. Freon
  

Question 37 :
German silver is an alloy of

  1. copper nickel and silver
  2. silver copper and aluminium
  3. zinc copper and nickel
  4. zinc silver and copper
  

Question 38 :
The acid which is secreted by the glands in the stomach wall is

  1. sulphuric acid
  2. hydrochloric acid
  3. nitric acid
  4. phosphoric acid
  

Question 39 :
Which one of the following minerals is found in Mona2ite sand ?

  1. Potassium
  2. Uranium
  3. Thorium
  4. Sodium
  

Question 40 :
The long range potential of nu I clear energy in India depends on i its reserves of

  1. thorium
  2. uranium
  3. plutonium
  4. radium
  

Question 41 :
The cathode of a lead storage battery is made up of

  1. Zinc
  2. Lead
  3. Lead oxide
  4. Manganese dioxide
  

Question 42 :
Which of the following is not a nucleon?

  1. Proton
  2. Neutron
  3. Electron
  4. Positron
  

Question 43 :
An atomic pile is used for

  1. producing X rays
  2. conducting nuclear fission
  3. conducting thermonuclear fusion
  4. accelerating atoms
  

Question 44 :
Solder is an alloy of

  1. lead zinc
  2. copper lead
  3. tin lead
  4. sodium lead
  

Question 45 :
The gas used in the artificial ripening of fruits is

  1. Acetylene
  2. Methane
  3. Ethane
  4. Butane
  

Question 46 :
In addition to hydrogen the other abundant element present on Suns surface is

  1. Helium
  2. Neon
  3. Argon
  4. Oxygen
  

Question 47 :
Major gaseous pollutant of the thermal power station is

  1. H2S
  2. NH3
  3. NO2
  4. S02
  

Question 48 :
Sea water can be purified by the process of

  1. distillation
  2. evaporation
  3. filtration
  4. fractional distillation
  

Question 49 :
Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid ?

  1. Methylene blue
  2. Methyl red
  3. Phenolphthaline
  4. Methyl orange
  

Question 50 :
Ruby and sapphire are oxides of

  1. copper
  2. tin
  3. iron
  4. aluminium
  

Question 51 :
Cement containing excess amount of lime

  1. cracks during setting
  2. becomes more strong
  3. is slow setting
  4. is quick setting
  

Question 52 :
An emulsifier is an agent which

  1. stabilises an emulsion
  2. aids the flocculation of an emulsion
  3. accelerates the dispersion
  4. homogenises an emulsion
  

Question 53 :
Which of the following alloy is used In making magnet ?

  1. Duralumin
  2. Stainless steel
  3. Elniko
  4. Magnesium
  

Question 54 :
Wax used for making candle is chemically a mixture of

  1. aliphatic hydrocarbons
  2. aromatic hydrocarbons
  3. cyclic hydrocarbons
  4. aliphatic and aromatic hydrocarbons
  

Question 55 :
When lime juice is dropped on baking soda brisk effervescence takes place because the gas evolved is

  1. Hydrogen
  2. Oxygen
  3. Carbon dioxide
  4. All of them
  

Question 56 :
Which inetal does not undergo corrosion due to the formation of oxide layer?

  1. Copper
  2. Iron
  3. Aluminium
  4. Zinc
  

Question 57 :
What is the most common salt in sea water ?

  1. Calcium carbonate
  2. Potassium chloride
  3. Sodium chloride
  4. Magnesium sulphate
  

Question 58 :
The most reactive among the halogens is

  1. Fluorine
  2. Chlorine
  3. Bromine
  4. Iodine
  

Question 59 :
Which one of the following is a major greenhouse gas?

  1. Carbon dioxide
  2. Chloro fluorocarbon
  3. Carbon monoxide
  4. Freon
  

Question 60 :
The advantage of detergents over soaps is

  1. Detergents are soluble in water
  2. Detergents could not give much lather
  3. Detergents give lather even with hard Water
  4. Soaps give lather with only soft water
  
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