Question 1

Which molecular geometry is predicted for CCl4 using the VSEPR model, and what are the expected bond angles?

Accepted Answer

Tetrahedral, $$109.5^\circ$$

Question 2

What is the electron domain geometry and molecular geometry of BF3?

Accepted Answer

Electron domain geometry: trigonal planar; molecular geometry: trigonal planar

Question 3

Which of the following molecules is always non-polar if all outer atoms are the same?

Accepted Answer

Tetrahedral

Question 4

A molecule has three electron domains around its central atom, one of which is a lone pair. What is its molecular geometry and approximate bond angle?

Accepted Answer

Bent, $$\u003c120^\circ$$

Question 5

Which hybridization corresponds to a central atom with four electron domains?

Accepted Answer

$$sp^3$$

Question 6

What is the molecular geometry of SnCl3$$^-$$ and is it polar or non-polar?

Accepted Answer

Trigonal pyramidal, polar

Question 7

Which statement best describes the difference between sigma ($$\sigma) $$and pi ($$\pi) $$bonds?

Accepted Answer

$$\sigma$$ bonds are stronger than $$\pi$$ bonds because their electron density is concentrated along the internuclear axis.

Question 8

Which molecule below has a trigonal bipyramidal electron domain geometry but a linear molecular geometry?

Accepted Answer

XeF2

Question 9

In the molecule O3 (ozone), what is the electron domain geometry and the molecular geometry?

Accepted Answer

Electron domain geometry: trigonal planar; molecular geometry: bent

Question 10

Which of the following best explains why CO2 is non-polar, while H2O is polar?

Accepted Answer

CO2 has polar bonds, but its linear geometry causes the dipoles to cancel; H2O has polar bonds and a bent geometry, so the dipoles do not cancel.

Question 11

What is the hybridization of the central atom in SF6, and what is the electron domain geometry?

Accepted Answer

Hybridization: $$sp^3d^2$; electron domain geometry: octahedral

Question 12

Which molecule below has a bond angle closest to $$120^\circ$$?

Accepted Answer

SO3

Question 13

A molecule has five electron domains around its central atom, two of which are lone pairs. What is its molecular geometry?

Accepted Answer

T-shaped

Question 14

Which of the following molecules is polar, even if all outer atoms are the same?

Accepted Answer

Trigonal pyramidal

Question 15

What is the orbital hybridization around the nitrogen atom in NH2$$^-$$?

Accepted Answer

$$sp^3$$

Question 16

Which of the following best describes the orbital overlap in the H-Cl bond?

Accepted Answer

Overlap of H 1s and Cl 3p orbitals

Question 17

How many sigma ($$\sigma) $$and pi ($$\pi) $$bonds are present in N2?

Accepted Answer

1 $$\sigma$$ bond and 2 $$\pi$$ bonds

Question 18

Which molecule below has a central atom with $$sp^2$$ hybridization?

Accepted Answer

SO3

Question 19

What is the electron domain geometry and molecular geometry of XeF4?

Accepted Answer

Electron domain geometry: octahedral; molecular geometry: square planar

Molecular Geometry and Bonding Theories: VSEPR, Hybridization, and Molecular Polarity

Guida di studio - Domande di pratica

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