CHEMICAL BONDING

1. 1. The central atom in IF₇ has seven pairs of valence electrons. The shape of the molecule as per VSEPR theory is

• A)Trigonal bipyramidal

• B)Hexagonal pyramid

• C) Pentagonal bipyramid

• D)Squar pyramidal

2. 2. In NO₃^- ion, number of bond pairs and lone pairs of electrons on nitrogen atom are

• A) 2,2

• B) 3,1

• C) 1,3

• D) 3,0

3. 3. In OF₂ molecule, the total number of bond pairs and lone pairs of electrons are respectively

• A) 2,6

• B) 2,8

• C) 2,10

• D) 2,9

4. 4. The geometry of ClO₃^- ion according to valence shell electron pair repulsion theory will be

• A) Planar triangular

• B) Pyramidal

• C) Tetrahedral

• D) Square planar

5. 5. Which of the following molecule is linear

• A) SO₂

• B) NO₂⁺

• C) NO₂^-

• D) SCl₂

6. 6. The hybrid orbital with least S - character is

• A) SP³d

• B) SP²

• C) SP

• D) SP³

7. 7. What is the hybridization of oxgen in Cl₂O molecule

• A) SP²

• B) SP

• C) SP³

• D) None

8. 8. The hybridization of atomic orbitals of nitrogen in NO₂⁺ , NO₂^- , NH₄⁺ are respectively

• A) SP², SP³, SP²

• B) SP, SP², SP³

• C) SP², SP, SP³

• D) SP², SP³, SP

9. 9. The molecular formula of Caro's acid

• A) H₂SO₄

• B) H₂S₂O₇

• C) H₂SO₅

• D) H₂S₂O₈

10. 10. The oxidation state of Sulphur in Thiosulphuric acid

• A) +6

• B) + 8

• C) +3

• D) +4