Gun powder uses

A. Sulphur

B. Charcoal

C. Potassium nitrate

D. All (A), (B), & (C)

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Blue vitriol is chemically
  2. Calgon used in water treatment is chemically
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  4. Styrene-butadiene-rubber (SBR) as compared to natural rubber has
  5. Lithophane is
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  7. Magnesium and calcium __________ cause temporary hardness of water.
  8. Chloramines are used in water treatment for
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  10. The amount of benzene present in pure Benzol is about __________ percent.
  11. Permanent hardness of water can be removed by
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  14. Chalcopyrite is the main ore of
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  16. Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction
  17. Deacon's method is used for the manufacture of
  18. A bio-catalyst produced by living cells which acts independent of the cell is called a/an
  19. Permanent hardness of water can be removed by
  20. The main component of Pyrex glass is
  21. Pick out the wrong statement.
  22. __________ acid is an unsaturated fatty acid.
  23. Pick out the wrong statement.
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  26. Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure…
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