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

Related Mcqs:

1. 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

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

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

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

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

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. Common salt is generally not produced commonly by ________________ method from brine ?

   A. Freeze drying
   B. Electrolytic
   C. Solar evaporation
   D. Vacuum evaporation

6. 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

7. Cooking liquor in case of sulphite process is _____________________?

   A. Sodium sulphite and sodium bisulphite
   B. Magnesium sulphite and free SO2 in acid medium
   C. Magnesium sulphate and magnesium bicarbonate
   D. None of these

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

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

9. 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.

10. Which of the following has sodium bicarbonate as its main constituent ?

    A. Baking soda
    B. Baking powder
    C. Washing soda
    D. None of these