Q. One of the breakthrough of Acharya P.C.Roy was to synthesize the following compound -
1) HgCl2
2) HgO
3) Hg2Cl2
4) NH2NO4
Q. Mauriatic acid used in household work is diluted form of -
1) Acetic acid
2) Hydrochloric acid
3) Oxalic acid
4) Aqua regia
Q. Phenyl used in household work is a derivative of -
1) Methyl alcohol
2) Tartaric acid
3) Benzene
4) Anthracene
Q. Which one among the following substances does not contribute to global warming ?
1) Oxide of Sulphur and Nitrogen
2) Methane
3) Carbon dioxide
4) Water vapour
Q. Acid rain is due to air pollution by -
1) Carbon dioxide
2) Carbon monoxide
3) Methane
4) Nitrous oxide and Sulphur dioxide
Q. pH value of pure water is -
1) Less than 7
2) More than 7
3) Equal to 7
4) Equal to 0
Q. The highly polished monolithic Ashokan Pillars were carved out of single pieces of a buffcoloured sandstone, usually minded from the quarries of -
1) Chunar near Mirzapur
2) Lauriya in Nandangarh
3) Sarnath near Vaaranasi
4) Udayagiri near
Q. Which chemical was an important symbol in our struggle for freedom?
1) Glucose
2) Fertilizer
3) Medicine
4) Sodium chloride
Q. Which one among the following is responsible for the expansion of water in the ocean?
1) Carbon dioxide
2) Nitrogen dioxide
3) Carbon monoxide
4) Sulphur dioxide
Q. Food cans are coated with tin but not win Zine because-
1) Zinc is costlier than tin
2) Zinc has a higher melting point than tin
3) Zinc is more reactive than tin
4) Tin is more reactive than zinc
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