Question

1. Give the number of lone pairs around the central atom and the molecular geometry of SeF4.

Question 1 options: 0 lone pairs, tetrahedral

1 lone pair, distorted tetrahedron (seesaw)

1 lone pair, square pyramidal

1 lone pair, tetrahedral

2 lone pairs, square planar Save

Question 2 Give the number of lone pairs around the central atom and the geometry of the ion SeO42–.

Question 2 options: 0 lone pairs, square planar

1 lone pair, square pyramidal

1 lone pair, distorted tetrahedron (seesaw)

0 lone pairs, tetrahedral

Question 3 The geometry of the CS2 molecule is best described as

Question 3 options: linear

trigonal planar

tetrahedral

bent

Question 4 Which of the following substances is/are bent? (i) H2S (ii). CO2 (iii) ClNO (iv) NH2– (v) O3

Question 4 options: only (iii)

only (i) and (v)

only (i), (iii), and (v)

all are bent except for (iv) all are bent except for (ii)

Question 5 The bond angle in SCl2 is expected to be

Question 5 options: a little less than 109.5°.

109.5°.

a little more than 109.5°. 120°. 180°.

Question 6 Complete this sentence: The PCl5 molecule has

Question 6 options: nonpolar bonds, and is a nonpolar molecule.

nonpolar bonds, but is a polar molecule.

polar bonds, but is a nonpolar molecule.

polar bonds, and is a polar molecule.

Question 7 Indicate the type of hybrid orbitals used by the central atom in PCl3.

Question 7 options: sp

sp2

sp3

sp3d

sp3d2

Question 8 Indicate the type of hybrid orbitals used by the central atom in SF6.

Question 8 options: sp

sp2

sp3

sp3d

sp3d2

Question 9 Which of the following species have the same geometries?

Question 9 options: NH2– and H2O

NH2– and BeH2

H2O and BeH2

NH2–, H2O, and BeH2

Question 10 Consider the species Cl2+, Cl2, and Cl2–. Which of these species will be paramagnetic?

Question 10 options: only Cl2

Cl2+ and Cl2

Cl2 and Cl2–

Cl2+ and Cl2–

all three are paramagnetic

Answer 1

1) seasaw 1 lonepair

2)0 lone pairs tetrahedral

3)linear

4)I, III, IV, V

5)103 degrees

6)polar bonds but it is non polar molecule

7)SP3d

8)sp3d2

9)NH2-, H2O

10)Cl2+, Cl2-