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Chemical Engineering :: Chemical Process

  1. White phosphorous is stored under water, because

  2. A.

     It does not react with water

    B.

     It is poisonous

    C.

     Its kindling temperature in dry air is very low

    D.

     It is unstable


  3. The most stable allotropic form of phosphorous is the __________ phosphorous.

  4. A.

     White

    B.

     Black

    C.

     Yellow

    D.

     Red


  5. Coagulant is used __________ filtration.

  6. A.

     Before

    B.

     After

    C.

     During

    D.

     To avoid


  7. Deacon's method is used for the manufacture of

  8. A.

     Glauber's salt

    B.

     Common salt

    C.

     Chlorine

    D.

     Graphite electrode


  9. Solvay process is used for the manufacture of

  10. A.

     Caustic soda

    B.

     Soda ash

    C.

     Caustic potash

    D.

     Soda lime


  11. The terminology 'BTX' used in coal tar distillation industry refers to

  12. A.

     Benzol-toluol-xylol

    B.

     Benzol-toluene-xylene

    C.

     Benzene-toluol-xylol

    D.

     Benzene-toluene-xylene


  13. Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.

  14. A.

     Cutting

    B.

     Fibrillation

    C.

     Hydration

    D.

     Strengthening


  15. Sulphuric acid completely saturated with sulphur trioxide is called

  16. A.

     Concentrated sulphuric acid

    B.

     Oleum

    C.

     Sulphurous acid

    D.

     Dilute sulphuric acid


  17. __________ is the major constituent of the Portland cement.

  18. A.

     Calcium carbonate

    B.

     Calcium oxide

    C.

     Tricalcium silicate

    D.

     Calcium sulphate


  19. The product obtained on mixing calcium oxide with water is called

  20. A.

     Quicklime

    B.

     Slaked lime

    C.

     Milk of lime

    D.

     None of these