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__________ is used as a flux in the smelting of copper ore like chalcopyrite.

A. Coke breeze

B. Lime powder

C. Silica/quartz

D. Dolomite

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  2. Which of the following is not required in the manufacture of soda ash by Solvay process?
  3. At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional…
  4. Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
  5. Heating of __________ to 120°C, produces plaster of paris.
  6. Which of the following has sodium bicarbonate as its main constituent?
  7. __________ is produced using Polycondensation reaction.
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  11. A mineral is termed as 'ore', if
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  13. The terminology 'BTX' used in coal tar distillation industry refers to
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  15. Air used in aerobic fermentation must be sterilized, otherwise the
  16. Which of the following is not a pyrite ore?
  17. Varnish does not contain
  18. Low temperature carbonisation of coal takes place at __________ °C.
  19. At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the…
  20. In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
  21. Diaphragm electrolytic cell as compared to mercury electrolytic cell
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  23. Esterification reaction
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