The raw materials required for the manufacture of glass are

A. silica, sodium nitrate and soda ash

B. silica, limestone and sodium nitrate

C. silica, sodium oxide and limestone

D. silica, soda ash and limestone

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  1. Which of the following carbon compounds is used as a fire extinguisher?
  2. An important use of nitrous acid is in
  3. The formula for cane sugar is
  4. In the mouth, starch is converted into ______ by the action of saliva.
  5. A form of carbon which is a good lubricant is
  6. Which or the following gases is soluble in water and Is collected by the downward displacement or air?
  7. Soda-water contains
  8. Alum is used
  9. Nylon is made from
  10. The commonest ore of aluminium is
  11. Which of the following is a communicable disease caused by viruses?
  12. The most abundant constituent in air is
  13. A mixture of naphthalene and sand is separated by
  14. The atomic number of an element represents
  15. Which of the following is not a characteristic of potable water?
  16. The earliest known acid is
  17. The earliest name given to nitrogen was
  18. A valuable by-product in the manufacture of soap is
  19. Which among the following is a solid non-metal?
  20. Which of the following cannot be used as fuel?
  21. Real gases tend to become ideal Under
  22. Proteins are polymerisation products of
  23. The alloy added in the preparation of steel contains
  24. The poisonous nature of carbon monoxide is due to
  25. In the process of purification of water for town supply, the substance used to remove bad smell and…
  26. An acid which is used as a preservative for pickles is
  27. Chloroform used as anaesthetic should be preserved In the dark in tightly stoppered bottles because…
  28. The depletion of the ozone layer in the upper atmosphere is due to -extensive use of
  29. The value of Avogadro Number is
  30. Which of the following is not a physical change?