8. The use of chemical additive anthraquinone and polysulphide a. Decreases the kappa number b. Increases the consumption of caustic soda c. Reduces the colour in the effluent d. Increases the energy consumption 9. Pulping efficiency and quality of pulp are affected by a. Chip size-length, thickness, uniformity of size, and removal of dust b. Fibre bonding, surface smoothness, and sizing c. The bleaching chemicals d. All of mentioned 10. Biomass is converted to liquid fuels by using a. Coal tar distillation b. Underground coal gasification (UCG) c. Rapid thermal processing (RTP) process d. Surface gasification 11. Purpose of black liquor oxidation is a. Reduce emission of chloride compounds b. Reduce emission of toxic compounds c. Reduce emission of carcinogenic compounds d. Reduce emission of sulphur compounds 12. Chemicals used in acid sizing are a. Fluorocarbon b. Alum, rosin c. Hypochlorite d. Aluminium chloride nexahydrate Q2). (SOL 1,4). 10 marks. True and false 1. Kraft recovery plant includes Lime sludge re-burning. 2. Refining action include fibrillation or staining effect of the fibre. 3. Kraft recovery unit contains only an evaporator, dissolving tank, lime storage, white liquor washer, and a furnace. 4. Weak black liquor contains high silica content. 5. Various bleaching chemical used for bleaching of pulp are chlorine, chlorine dioxide, ozone, hydrogen peroxide, calcium hypochlorite. 6. In daily life; the chemical industry has a role in education. 7. Inorganic chemicals are one of the important sectors of chemical industry by providing petroleum products. 8. In evaporation of black liquor feed arrangement forward feed is used. 9. Increase in lignin content of pulp, reduces the chlorinated organic matter in the effluent. 10. A coal mining depth range determines only the economy of extraction