A. Evaporation and burning the concentrate followed by causticisation of products
B. Multi-effect evaporation only
C. Selective liquid extraction
D. Extractive distillation
Related Mcqs:
- 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 - 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. - The major constituent of black liquor generated during paper manufacture is sodium___________________?
A. Sulphate
B. Carbonate
C. Hydroxide
D. Bi-carbonate - 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 - Bromides contained in hot mother liquor is treated with ______________ during manufacture of bromine from sea water ?
A. SO3
B. Cl2
C. NH3
D. SO2 - 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 - Liquor poisoning generally occurs due to the presence of _________________ in it ?
A. Ethyl alcohol
B. Impurities
C. Methyl alcohol
D. Carbonic acid - 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 - 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at _____________ °C ?
A. < 0
B. 10-30
C. 250-280
D. 500-600 - Oils and fats are converted to soap in a process called _________________?
A. Hydrogenation
B. Esterification
C. Saponification
D. None of these
