31. Starting material for the commercial production of ethyl alcohol in India is
32. Oxidation of SO2 to SO3 is favoured by
33. Main use of liquid nitrogen is in
34. Pick out the wrong statement.
35. Na2CO3 is called
36. Na2CO3.10H2O is called
37. Naphthols are derivates of
38. Which of the following has sodium bicarbonate as its main constituent ?
39. Dehydrogenation of isopropanol produces
40. Which of the following is the second major component of cement?
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