5. Which of the following is highly polar molecular
a) HCl b) HF c) H2S d) NH3
6. Maximum covalent nature can be seen in
a) CsF b) RbF c) NaF d) LiF
7. Which of the following species has tetrahedral geometry
a) BH4 b) NH3 c) CO3
-2 d) H3O+
8. Gram atomic weight of nitrogen is
a) 28 b) 14 c) 7 d) 1
9. The oxidation number of Mg in MgO is
a) 0 b) -2 c) +1 d) +2
10. Fluorine exhibits only which oxidation number
a) 0 b) -1 c) + 1 d) – 2
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Answer:
5 option B
6 option A
7 option A
8 option B
9 option D
10 option B
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