General Knowledge on Chemistry

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81. To weld metal together, high temperature required such a high temperature is obtained by burning A. acetylene in oxygen B. LPG in oxygen C. methane in oxygen D. acetylene in nitrogen Check Answer \| Discussion 82. The rusting of iron nail A. decreases it weight B. increases its weight C. does not affect weight but iron is oxidised D. does not affected weight but iron is reduced Check Answer \| Discussion 83. Which one among the following is the commonest amino acid in nature? A. Glycine B. Alanine C. Phenylalanine D. Aspartic acid Check Answer \| Discussion 84. Contact lenses are made from A. polyvinyl chloride B. polystyrene C. teflon D. lucite Check Answer \| Discussion 85. Which one among the following polymers is used for making bullet-proof material? A. Polyvinyl chloride B. Polystyrene C. Polyethylene D. Polyamide Check Answer \| Discussion 86. Oxygen on reaction with non-metals forms oxides, which are A. basic oxides B. acidic oxides C. amphoteric oxides D. neutral oxides Check Answer \| Discussion 87. Which element forms the highest number of compounds in the periodic table? A. Carbon B. Oxygen C. Silicon D. Sulphur Check Answer \| Discussion 88. Which of the following is not a carboxylic acid A. Tartaric acid B. Picric acid C. Formic acid D. Citric acid Check Answer \| Discussion 89. Tritiun is an isotope of A. oxygen B. hydrogen C. phosphorous D. nitrogen Check Answer \| Discussion 90. Which allotropy of carbon is in rigid three-demensional structure? A. Graphite B. Fullerene C. Diamond D. Carbon black Check Answer \| Discussion
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General Knowledge on Chemistry

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