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Portland cement consists mainly of

A. CaO & SiO2

B. SiO2 & Al2O3

C. CaO & Al2O3

D. CaO & Fe2O3

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  3. Deaeration of water in its treatment is necessary, as it
  4. Baking soda is chemically represented by
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  13. Analgesic drugs are
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  15. Zeolite is used in the
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  17. Chrome tanning and vegetable tanning are done for
  18. Pure rectified spirit contains about __________ percent alcohol.
  19. Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers…
  20. Sulphur addition in soap is done to
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  22. Fermentation of molasses to produce ethyl alcohol is done at __________ °C.
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