Chemistry - Single MCQs (Page 22)

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Q211. Hair contains keratin proteins which are also present in nails and wool is an ex...Q212. Empirical formula for water is ?...Q213. Free radicals are electrically ?...Q214. A mixture that consists of different components is called ?...Q215. Element reduced in following reaction 2Ca + O2 2CaO is ?...Q216. Rusting of iron occurs due to ?...Q217. A concentrated aqueous solution of sodium chloride is called ?...Q218. Electrolytes convert electricity in ?...Q219. In thermal power stations carbon atoms undergo oxidation to form ?...Q220. Electrodes used in production of sodium metal are ?...