Cooking liquor in case of sulphite process is _____________________?

Related Mcqs:

1. In Kraft process of paper manufacture, white cooking liquor consists of caustic soda________________?

   A. Sodium sulphide & sodium carbonate
   B. Sodium sulphite & sodium carbonate
   C. Sodium sulphite & sodium sulphide
   D. None of these

2. Comparing sulphate process with sulphite process, we find that ______________ in the later ?

   A. Both temperature & pressure in the former is less than that
   B. Both temperature & pressure in the former is more than that
   C. Temperature is more in the former whereas pressure is more
   D. Pressure is more in the former whereas temperature is less

3. Black liquor is converted into white liquor by __________________________?

   A. Evaporation and burning the concentrate followed by causticisation of products
   B. Multi-effect evaporation only
   C. Selective liquid extraction
   D. Extractive distillation

4. The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to___________________?

   A. Avoid mechanical weakening of fibre
   B. Remove lignin by way of crystallisation
   C. Increase the cellulose content
   D. None of these

5. Bromides contained in hot mother liquor is treated with ______________ during manufacture of bromine from sea water ?

   A. SO3
   B. Cl2
   C. NH3
   D. SO2

6. Liquor poisoning generally occurs due to the presence of _________________ in it ?

   A. Ethyl alcohol
   B. Impurities
   C. Methyl alcohol
   D. Carbonic acid

7. Tall oil obtained as a by-product from the black liquor recovery is________________?

   A. A black, sticky & viscous liquid
   B. Used in the manufacture of greases, emulsions & soaps
   C. Composed mainly of rosin & fatty acids
   D. All A , B. & C.

8. Which of the following is the main constituent of the mother liquor produced in salt industry ?

   A. Quick lime
   B. Glauber’s salt
   C. Salt petre
   D. Bromine

9. The major constituent of black liquor generated during paper manufacture is sodium___________________?

   A. Sulphate
   B. Carbonate
   C. Hydroxide
   D. Bi-carbonate

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

    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.