Home / Chemical Engineering / Chemical Process :: Section-15

Chemical Engineering :: Chemical Process

  1. Calgon used in water treatment is chemically

  2. A.

     Sodium phosphate

    B.

     Sodium hexametaphosphate

    C.

     Calcium phosphate

    D.

     Tricresyl phosphate

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. The main use of activated carbon in water treatment is to control

  4. A.

     Bacterial growth

    B.

     Taste and odour

    C.

     Turbidity

    D.

     None of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. Type of glass used in optical work is the __________ glass.

  6. A.

     Soda-lime

    B.

     Fibre

    C.

     Lead

    D.

     Borosilicate

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. The most economical pulp for the production of newsprint would be the __________ pulp.

  8. A.

     Groundwood

    B.

     Sulphate

    C.

     Sulphite

    D.

     Semichemical

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. Solvay process as compared to dual process (i.e. modified Solvay process)

  10. A.

     Can use low grade brine

    B.

     Has less corrosion problems

    C.

     Involves higher investment in NH₃ recovery units than that for crystallisation units for NH₄Cl

    D.

     Both B and C

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. Pick out the wrong statement.

  12. A.

     Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action

    B.

     Soap powder is prepared by mixing soap with hydrated sodium carbonate

    C.

     Detergents differ from soaps in their action in hard water

    D.

     Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. Cumene (isopropyl benzene) is made by

  14. A.

     Oxidation of napthalene

    B.

     Propylene alkylation of benzene

    C.

     Polymerisation of a mixture of benzene & propylene

    D.

     None of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.

  16. A.

     Coke and sand

    B.

     Brine and coal

    C.

     Coke and caustic soda

    D.

     None of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. The gasification reaction represented by, C + H₂O = CO + H₂, is a/an __________ reaction.

  18. A.

     Exothermic

    B.

     Endothermic

    C.

     Catalytic

    D.

     Autocatalytic

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. Dense soda ash used in the manufacture of glass, is chemically represented by

  20. A.

     Na₂CO₃

    B.

     Na₂CO₃.10H₂O

    C.

     Na₂CO₃.H₂O

    D.

     Na₂HCO₃

    View Answer

    Workspace

    Discuss Discuss in Forum