111)Which of the following atomic numbers of elements have similar chemical properties
112)In the modern periodic table group 2 (IIA) elements are called as
113)The valency of calcium is
114)Atomic number of an element is 17. then the period to which this element belongs
115)Which one of the following is strong acid
116)Which one of the following is an acidic oxide
117)Metallic oxides are generally …… in nature
118)The nature of chemical in antacid is
119)pH value of aqueous NaCl solution is
120)The chemical formula of blue coloured Copper Sulphate crystal is,
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