Chemistry - Single MCQs (Page 17)

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Q161. Temperature at which solid starts melting is called ?...Q162. Conversion of a liquid to a gas at all temperatures is called ?...Q163. Process in which solid changes directly in to vapors without changing in liquid ...Q164. In periodic table, helium is placed at ?...Q165. Both of elements of 1st period contains valence electrons in ?...Q166. Number of protons and neutrons in nucleus if atomic number of element is 17 and ...Q167. A balloon filled with 5g of hydrogen contains ?...Q168. A hydrogen atom is ?...Q169. A substance whose all atoms have same atomic number is ?...Q170. Gram atomic mass of Zn is ?...