General Knowledge on Chemistry

(Click on suggested Options to select the answer \| Color Red means : Wrong & Green Means: Correct)
221. The hardest form of carbon is A. coke B. graphite C. diamond D. charcoal Check Answer \| Discussion 222. The method that cannot be used for removing permanent hardness of water is A. adding sodium carbonate B. distillation C. adding caustic soda D. boiling Check Answer \| Discussion 223. The inexpensive and commonly used variety of glass is called soda glass. It is called so because A. was used initially for making bottles of soda(carbonated drink) B. is made using soda(sodium carbonate) C. was initially used for storing sodium carbonate D. is made using soda lime Check Answer \| Discussion 224. The Latin word formica means ant. The name formic acid is derived from this Latin word because A. this acid, in ancient times, was used to eliminate ant-hills B. this corrosive acid is secreted by ants to drive away their enemies C. this acid was first obtained by the distillation of ants D. ants are attracted by the odour of this acid Check Answer \| Discussion 225. The mass number of an atom is equal to A. the number of protons B. the number of protons and electrons C. the number of nucleons D. the number of neutrons Check Answer \| Discussion 226. The high reactivity of fluorine is due to A. its high electro negativity B. small size of fluorine atom C. availability of d-orbitals D. strong F - F bond Check Answer \| Discussion 227. The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is A. 2.05 gram B. 3.05 gram C. 4.05 gram D. 5.05 gram Check Answer \| Discussion 228. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called A. liquation B. leaching C. levigation D. magnetic separation Check Answer \| Discussion 229. The inherited traits of an organism are controlled by A. RNA molecules B. nucleotides C. DNA molecules D. enzymes Check Answer \| Discussion 230. The mass number of a nucleus is A. always less than its atomic number B. the sum of the number of protons and neutrons present in the nucleus C. always more than the atomic weight D. a fraction Check Answer \| Discussion
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General Knowledge on Chemistry

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