Chemistry - Single MCQs (Page 20)

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Q191. Molecular formula gives ?...Q192. Vinegar contains ?...Q193. An oxide ion has -2 charge because ?...Q194. Compounds have atoms of ?...Q195. Number of protons in nucleus constitute it's ?...Q196. 1 mole of substance refers to ?...Q197. Branch of chemistry dealing with plantation and overcoming greenhouse effect is ...Q198. A free radical has ?...Q199. Smallest part of an element that cannot exist as a free state is ?...Q200. Formula mass indicates simplest ration between ?...