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

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

Explanation / Answer

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-

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