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Neoprene is the trade name of

A. Polyurethane

B. Phenol formaldehyde

C. Polychlorophrene

D. Styrene-butadiene rubber

Correct Answer : C.


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  4. Chalcopyrite is the main ore of
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  11. Bleaching of paper pulp is done with
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  13. The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
  14. Common salt is generally not produced commonly by __________ method from brine.
  15. Molecular weight of plastics ranges from
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  18. Sodium bisulphite is used for __________ water.
  19. Sulphuric acid saturated with SO3 is called
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  21. Yeast is used in the manufacture of
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  24. Permanent hardness of water can be removed by
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  26. Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of
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