General Knowledge on Chemistry

(Click on suggested Options to select the answer \| Color Red means : Wrong & Green Means: Correct)
121. Which one of the following is correct ? Butter is A. a supercooled B. an emulsion C. a molecular solid D. a gel Check Answer \| Discussion 122. Natural Opal which is commonly used as gemstone in many countries is mainly A. a hydrated calcium compound B. a magnesium compound C. a sulphur compound D. a hydrated silica Check Answer \| Discussion 123. Which one of the following pairs of metals is present in the cytochrome -c and chlorophyll respectively? A. Fe and Zn B. Mg and Mn C. Fe and Mg D. Mg and Zn Check Answer \| Discussion 124. Which one among the following is the chief compound used in Pepper spray, a riot control agent ? A. Capsaicin B. Black pepper C. Sulphur dioxide D. Hydrogen sulphide Check Answer \| Discussion 125. Gold is mainly extracted by A. carbon reduction B. self reduction C. electrolytic method D. Arndt forrest cyanide method Check Answer \| Discussion 126. The pure from of carbon is A. diamond B. graphite C. charcoal D. fullerene Check Answer \| Discussion 127. Which one of the following fatty acids consists only the essential fatty acids ? A. Bauxite B. Pig iron C. Malachite D. Zinc blende Check Answer \| Discussion 128. Which one of the following is the major component of the photochemical smog ? A. Carbon dioxide B. Ozone C. Carbon monoxide D. Nitrogen Check Answer \| Discussion 129. Commercially vulcanisation of rubber involves A. sulphur B. carbon C. phosphorus D. selenium Check Answer \| Discussion 130. 'Freon' used as refrigerants is chemically known as A. fluorinated aromatic compound B. fluorinated hydrocarbon C. chlorinated hydrocarbon D. chlorofluoro hydrocarbon Check Answer \| Discussion
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General Knowledge on Chemistry

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