31. Pick out the exothermic reaction out of the following:
32. Grignard reagent is chemically known as
33. Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.
34. Styrene butadiene rubber (SBR) is
35. Starting material for the production of styrene butadiene rubber (SBR) is
36. Permanent hardness of water is due to the presence of calcium & magnesium
37. Riboflavin is a/an
38. Yellow glycerine is made into white, using
39. Percentage of glycerene present in the spent lye obtained during soap manufacture is about
40. Gun powder, which is an explosive comprises of charcoal, sulphur and
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