Here is some top most asked question in genral science related to the chemisttry which may be ask in government exam like sbi po , group c, IAS, PCS etc.

  • Of which alloy the commonly used safety fuse-wire is made? – Alloy of Tin and Lead
  • What is alcohol obtairied in the saponification process? – Glycerol
  • Which antiseptic compound is present in Dettol? – Chloroxylenol
  • By which was the presence of Cobalt. in Vitamin B-12 established for the first time? – Borax-Bead test
  • Which metal can deposit copper from copper sulphate solution? – Iron
  • Which group of gases contribute to the “Green House effect”? – Carbon dioxide and Methane
  • Of which Container radioactive materials should be kept? – Pb
  •  Which is not an anaesthetic agent in surgical operations? – Acetone
  • What is the percentage of Nitrogen, present in ammonium sulphate? – 21%
  • Which is the nuclear particle having no mass and no charge, but only spin? – Neutrino
  • The pH of fresh milk is 6. When it turns sour, what will be the pH? – Less than 6
  • What is a compound that is a white solid which absorbs water vapour from the air? – Calcium chlorid
  •  To which product of equivalent weight and valency of an element is equal? – Atomic weight
  • Which element forms the highest number of compounds in the periodic table? – Silicon
  • What is the name of gas which is present in both the natural gas and the biogas? – Methane
  • How many elements are in the second period of the periodic table? – Eight
  • How does addition of ethylene dibromide help to petrol? – Elimination of lead oxide
  • What do we call the process of separation of pure water from impurities? – Distillation
  • With which liqued is anomalous expansion associated? – Water
  • What is a tick paste of cement, sand and water called? – Mortar
  • Ethanol containing 5% water By which name is it known? – Rectified spirit
  • Which is used to dilute oxygen in the gas cylinders used by divers? – Helium
  • What do cathode rays caise when obstructed by metal? –emission of X-rays
  • Which gase is supporter of combustion? – Oxygen
  • On heating, Gypsum loses certain percentage of its water content and what does it become? – Plaster of Paris
  • A liquid initially contracts when cooled down to 4 degree Celsius bu
  • How must have metals used to make wires for safety fuses? – Low resistivity and low melting point
  • Sodium stearate is a salt and how is it used? – To make soap
  • Which are the two main constituents of granite? – Iron and silica
  • Which method of water purification does not kill microorganism? – Filtration


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