111)When Na2CO3 reacts with an acid, which of the following gases is evolved
112)An antacid is
113)The nature of non-metal oxide is
114)Principal quantum number (n) is represented with
115)Which of the following properties was explained by Bohr's atomic model
116)Maximum number of electrons held by p-orbital is
117)The electronic configuration of an element is based on
118)Which of the following quantum number can't have zero value
119)In which of the following, elements are arranged in ascending order of their atomic numbers
120)Which of the following quantum numbers increases down the group in the modern periodic table
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