Question 1

Predict the geometry around the central atom in SO₄^2-.

Accepted Answer

The central atom is P and it has 4 regions of electron density (1 bond with S, 3 lone pairs on P), which corresponds to the tetrahedral geometry.

Question 2

The bond angles in CO₃^2- are expected to be

Accepted Answer

The CO₃²⁻ ion has a trigonal planar geometry, resulting in bond angles of 120°.

Question 3

A central atom with 5 electron pairs (single bonds and/or lone pairs of electrons) could have which of the following molecular geometries
I. Trigonal bipyramidal
II. Seesaw
III. T-shaped
IV. Linear

Accepted Answer

A central atom with 5 electron pairs can exhibit all the listed geometries: trigonal bipyramidal (5 bonding pairs), seesaw (4 bonding pairs, 1 lone pair), T-shaped (3 bonding pairs, 2 lone pairs), and linear (2 bonding pairs, 3 lone pairs).

Question 4

A molecule with 5 single bonds (and any number of lone pairs) could have which type of molecular geometry
I. Trigonal bipyramidal
II. Seesaw
III. T-shaped
IV. Square pyramidal

Accepted Answer

The answer of A molecule with 5 single bonds (and...

Question 5

A central atom with 4 electron pairs (single bonds and/or lone pairs of electrons) could have which of the following molecular geometries
I. Trigonal bipyramidal
II. Tetrahed ral
III. Trigonal pyramidal
IV. Bent

Accepted Answer

A central atom with 4 electron pairs can have tetrahedral (all bonding pairs), trigonal pyramidal (3 bonding pairs, 1 lone pair), or bent (2 bonding pairs, 2 lone pairs) geometries.

Question 6

A molecule with 2 single bonds and 3 lone pair of electrons is predicted to have which type of moleculary geometry

Accepted Answer

A molecule with 2 single bonds and 3 lone pairs will have a linear geometry according to the VSEPR theory, as the lone pairs will occupy equatorial positions in a trigonal bipyramidal arrangement, leaving the two bonded atoms 180 degrees apart.

Question 7

A molecule with 4 single bonds (and any number of lone pairs) could have which of the following molecular geometries
I. Tetrahedral
II. Seesaw
III. Square Planar
IV. T-shaped

Accepted Answer

A molecule with 4 single bonds has 4 electron pairs around the central atom. The possible molecular geometries are determined by the number of lone pairs and the number of bonded atoms. 
I. Tetrahedral - this geometry has 4 bonded atoms and no lone pairs 
II. Seesaw - this geometry has 3 bonded atoms and 1 lone pair 
III. Square Planar - this geometry has 2 bonded atoms and 2 lone pairs 
IV. T-shaped - this geometry has 2 bonded atoms and 3 lone pairs 
Thus, a molecule with 4 single bonds could have molecular geometry I, II, or III. Therefore, the best choice is D, as it includes all three possibilities.

Question 8

The bond angles in ICl₂^- are expected to be

Accepted Answer

ICl2- has a linear shape due to the presence of three lone pairs on the central iodine atom, resulting in bond angles of 180°.

Question 9

According to VSEPR theory, which one of the following species has a tetrahedral geometry

Accepted Answer

The species PCl5, which is represented as PCl₄⁺, has a tetrahedral geometry according to VSEPR theory. It has five bonding pairs and no lone pairs, resulting in a trigonal bipyramidal arrangement of electron pairs. However, one of the equatorial positions is occupied by two lone pairs, causing distortion and resulting in a tetrahedral shape.

Question 10

A molecule with 4 single bonds and 1 lone pair of electrons is predicted to have which type of molecular geometry

Accepted Answer

The molecule with 4 single bonds and 1 lone pair of electrons has a total of 5 electron domains. Based on VSEPR theory, this gives it a molecular geometry of either trigonal bipyramidal or seesaw. However, the presence of the lone pair of electrons makes it impossible for the molecule to have a trigonal bipyramidal geometry due to the large number of lone pair-lone pair and lone pair-bonding pair repulsions. Therefore, the only possible geometry is seesaw.

Question 11

A molecule with 2 single bonds and 2 lone pairs of electrons around the central atom is predicted to have what type of molecular geometry

Accepted Answer

If a molecule has 2 single bonds and 2 lone pairs of electrons around the central atom, the electron geometry is tetrahedral. However, the presence of lone pairs means that the actual molecular geometry will be different from the electron geometry. In this case, the two lone pairs will repel each other more strongly than the two bonding pairs, causing the molecule to have a bent shape. Thus, the correct answer is C - bent geometry.

Question 12

Which of the following substances is/are bent (i) H₂S (ii). CO₂ (iii) ClNO (iv) NH₂^- (v) O₃

Accepted Answer

The answer of Which of the following substances is/are bent
(i)...

Question 13

A molecule with 3 single bonds (and any number of lone pairs) could have which of the following molecular geometries
I. Trigonal planar
II. Trigonal pyramidal
III. Seesaw
IV. T-shaped

Accepted Answer

The answer of A molecule with 3 single bonds (and...

Question 14

A molecule with 3 single bonds and 0 lone pairs of electrons is predicted to have which type of molecular geometry

Accepted Answer

A molecule with 3 single bonds and 0 lone pairs of electrons adopts a trigonal planar geometry according to VSEPR theory.

Question 15

Predict the geometry around the central atom in PO₄^3-.

Accepted Answer

The central atom in the molecule is P (phosphorus), which has five valence electrons. There are four single bonds with S (sulfur) and one lone pair on P. This arrangement follows the tetrahedral geometry, which has a bond angle of 109.5 degrees. Therefore, the best choice is (C) tetrahedral.

Question 16

The bond angles in SCl₂ are expected to be

Accepted Answer

In SCl2, the bond angle is slightly less than 109.5° due to lone pair repulsion. In SO2, the bond angle is also slightly less than 109.5° due to lone pair repulsion. Therefore, in the molecule SClSO2, the lone pair on the sulfur atom will cause the bond angle to be slightly less than 109.5°.

Question 17

The bond angle in Cl₂O is expected to be approximately

Accepted Answer

The molecule Cl₂O has five atoms bonded to the central boron atom, giving it a trigonal bipyramidal geometry. The three atoms in the equatorial plane are bonded at 120° angles (option C) and the two axial atoms are bonded at 180° angles. The bond angle between the axial and equatorial atoms is approximately 90° (option A). However, this angle is slightly distorted due to the lone pair on the equatorial Cl atom, which repels the other atoms and reduces the bond angle. Therefore, the expected bond angle in Cl₂O is closer to 109.5° (option B), which is the ideal bond angle for a trigonal bipyramidal geometry with one equatorial lone pair. Option D and E are unlikely choices as they are far from the expected bond angle based on the molecule's geometry.

Question 18

A molecule with 3 single bonds and 1 lone pair of electrons around the central atom is predicted to have what type of molecular geometry

Accepted Answer

A molecule with 3 single bonds and 1 lone pair of electrons around the central atom has a tetrahedral electron-pair geometry, but due to the presence of a lone pair, the molecular geometry is trigonal pyramidal. The bond angles are slightly less than 109.5 degrees, and the lone pair occupies one of the equatorial positions.

Question 19

The bond angles in SF₅⁺ are expected to be

Accepted Answer

The molecule SF₅⁺ has a trigonal bipyramidal geometry. The central sulfur atom (S1) is bonded to three fluorine atoms (F1) in a plane with 120° bond angles (equatorial position) and two axial positions (U1), one of which is occupied by a sulfur atom (S2) and the other by a phosphorus atom (P1) and a lone pair of electrons (S1). The lone pair on sulfur (S1) occupies an equatorial position in a plane perpendicular to the plane of the three fluorine atoms. Therefore, the expected bond angles are as follows: - F1-S1-F1: 90° (lone pair on S1 repels the bonding pairs) - F1-S1-S2: 120° (trigonal planar arrangement of F-S-F at equatorial positions) - F1-S1-P1: 120° (trigonal planar arrangement of F-S-F at equatorial positions) - S2-S1-P1: 180° (linear arrangement of axial atoms)

Question 20

Which of the following substance is/are planar (i) SO₃ (ii) SO₃^2- (iii) NO₃^- (iv) PF₃ (v) BF₃

Accepted Answer

The presence of the "S" elements means that the compounds have sulfur in them. Of the choices given, only (i), (iii), and (v) have sulfur attached to a carbon atom that is part of a planar aromatic ring, making them planar. (ii) and (iv) lack the necessary aromaticity to be considered planar.

Quiz 10: Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Predict the geometry around the central atom in SO₄^2-.

The bond angles in CO₃^2- are expected to be

A central atom with 5 electron pairs (single bonds and/or lone pairs of electrons) could have which of the following molecular geometries I. Trigonal bipyramidal II. Seesaw III. T-shaped IV. Linear

A molecule with 5 single bonds (and any number of lone pairs) could have which type of molecular geometry I. Trigonal bipyramidal II. Seesaw III. T-shaped IV. Square pyramidal

A central atom with 4 electron pairs (single bonds and/or lone pairs of electrons) could have which of the following molecular geometries I. Trigonal bipyramidal II. Tetrahed ral III. Trigonal pyramidal IV. Bent

A molecule with 2 single bonds and 3 lone pair of electrons is predicted to have which type of moleculary geometry

A molecule with 4 single bonds (and any number of lone pairs) could have which of the following molecular geometries I. Tetrahedral II. Seesaw III. Square Planar IV. T-shaped

The bond angles in ICl₂^- are expected to be

According to VSEPR theory, which one of the following species has a tetrahedral geometry

A molecule with 4 single bonds and 1 lone pair of electrons is predicted to have which type of molecular geometry

A molecule with 2 single bonds and 2 lone pairs of electrons around the central atom is predicted to have what type of molecular geometry

Which of the following substances is/are bent (i) H₂S (ii) . CO₂ (iii) ClNO (iv) NH₂^- (v) O₃

A molecule with 3 single bonds (and any number of lone pairs) could have which of the following molecular geometries I. Trigonal planar II. Trigonal pyramidal III. Seesaw IV. T-shaped

A molecule with 3 single bonds and 0 lone pairs of electrons is predicted to have which type of molecular geometry

Predict the geometry around the central atom in PO₄^3-.

The bond angles in SCl₂ are expected to be

The bond angle in Cl₂O is expected to be approximately

A molecule with 3 single bonds and 1 lone pair of electrons around the central atom is predicted to have what type of molecular geometry

The bond angles in SF₅⁺ are expected to be

Which of the following substance is/are planar (i) SO₃ (ii) SO₃^2- (iii) NO₃^- (iv) PF₃ (v) BF₃

Quiz 10: Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Predict the geometry around the central atom in SO42-.

The bond angles in CO32- are expected to be

A central atom with 5 electron pairs (single bonds and/or lone pairs of electrons) could have which of the following molecular geometries I. Trigonal bipyramidal II. Seesaw III. T-shaped IV. Linear

A molecule with 5 single bonds (and any number of lone pairs) could have which type of molecular geometry I. Trigonal bipyramidal II. Seesaw III. T-shaped IV. Square pyramidal

A central atom with 4 electron pairs (single bonds and/or lone pairs of electrons) could have which of the following molecular geometries I. Trigonal bipyramidal II. Tetrahed ral III. Trigonal pyramidal IV. Bent

A molecule with 2 single bonds and 3 lone pair of electrons is predicted to have which type of moleculary geometry

A molecule with 4 single bonds (and any number of lone pairs) could have which of the following molecular geometries I. Tetrahedral II. Seesaw III. Square Planar IV. T-shaped

The bond angles in ICl2- are expected to be

According to VSEPR theory, which one of the following species has a tetrahedral geometry

A molecule with 4 single bonds and 1 lone pair of electrons is predicted to have which type of molecular geometry

A molecule with 2 single bonds and 2 lone pairs of electrons around the central atom is predicted to have what type of molecular geometry

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

A molecule with 3 single bonds (and any number of lone pairs) could have which of the following molecular geometries I. Trigonal planar II. Trigonal pyramidal III. Seesaw IV. T-shaped

A molecule with 3 single bonds and 0 lone pairs of electrons is predicted to have which type of molecular geometry

Predict the geometry around the central atom in PO43-.

The bond angles in SCl2 are expected to be

The bond angle in Cl2O is expected to be approximately

A molecule with 3 single bonds and 1 lone pair of electrons around the central atom is predicted to have what type of molecular geometry

The bond angles in SF5+ are expected to be

Which of the following substance is/are planar (i) SO3 (ii) SO32- (iii) NO3- (iv) PF3 (v) BF3

Predict the geometry around the central atom in SO₄^2-.

The bond angles in CO₃^2- are expected to be

The bond angles in ICl₂^- are expected to be

Which of the following substances is/are bent (i) H₂S (ii) . CO₂ (iii) ClNO (iv) NH₂^- (v) O₃

Predict the geometry around the central atom in PO₄^3-.

The bond angles in SCl₂ are expected to be

The bond angle in Cl₂O is expected to be approximately

The bond angles in SF₅⁺ are expected to be

Which of the following substance is/are planar (i) SO₃ (ii) SO₃^2- (iii) NO₃^- (iv) PF₃ (v) BF₃