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General Knowledge :: Chemistry

  1. An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :

  2. A.

     Power transmittor

    B.

     Battery

    C.

     Uninterrupted power supply (UPS)

    D.

     Generator


  3. The metals commonly used for electroplating are

  4. A.

     Gold, Sodium and Chromium

    B.

     Chromium, Copper and Nickel

    C.

     Nickel, Lead and Chromium

    D.

     Gold, Sodium and Potassium


  5. In galvanization, iron is coated with

  6. A.

     Copper

    B.

     Zinc

    C.

     Tin

    D.

     Nickel


  7. The process of improving the quality of rubber by heating it with sulphur is called

  8. A.

     Vulcanization

    B.

     Acceleration

    C.

     Sulphonation

    D.

     Galvanization


  9. Rusting of iron takes place due to

  10. A.

     Oxidation

    B.

     Carbonation

    C.

     Exfoliation

    D.

     Corrosion


  11. Combustion of a candle is a/an

  12. A.

     Photochemical reaction

    B.

     Physical change

    C.

     Endothermic reaction

    D.

     Exothermic reaction


  13. Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?

  14. A.

     Methane

    B.

     Ethane

    C.

     Propane

    D.

     Butane


  15. Candle is a mixture of

  16. A.

     Paraffin was and stearic acid

    B.

     Bees wax and stearic acid

    C.

     Higher fatty acids and stearic acid

    D.

     Bees wax and paraffin wax


  17. Coal is formed from

  18. A.

     Crude oil

    B.

     Deposit of animal waste

    C.

     Coke

    D.

     Compressed and hardened biomass