Question 1

Which statement best describes the main idea of VSEPR theory?

Accepted Answer

Electron groups around the central atom are arranged as far apart as possible to minimize repulsion.

Question 2

What is the molecular shape and bond angle of CO$$_2$$ according to VSEPR theory?

Accepted Answer

Linear, $$180^{\circ}$$

Question 3

A molecule of SO$$_2$$ has three electron groups around the central atom: two bonds and one lone pair. What is its molecular shape and approximate bond angle?

Accepted Answer

Bent, $$120^{\circ}$$

Question 4

Which molecule is nonpolar despite having polar bonds?

Accepted Answer

CO$$_2$$

Question 5

What is the correct formula for the ionic compound formed between Ba$$^{2+}$$ and Cl$$^-$$?

Accepted Answer

BaCl$$_2$$

Question 6

Which of the following compounds contains hydrogen bonding as its main intermolecular force?

Accepted Answer

NH$$_3$$

Question 7

Given the formula FeCl$$_3$$, what is the correct name for this compound?

Accepted Answer

Iron(III) chloride

Question 8

Which of the following molecules has a trigonal pyramidal shape?

Accepted Answer

NH$$_3$$

Question 9

What is the main type of attractive force present in a liquid sample of Cl$$_2$$?

Accepted Answer

Dispersion forces

Question 10

Which of the following has the highest melting point due to its bonding type?

Accepted Answer

NaCl

Question 11

A molecule of PF$$_3$$ has four electron groups (three bonds and one lone pair) around the central atom. What is its molecular shape?

Accepted Answer

Trigonal pyramidal

Question 12

Which of the following is the correct formula for iron(II) oxide?

Accepted Answer

FeO

Question 13

Which step is NOT part of the guide to predicting molecular shape using VSEPR theory?

Accepted Answer

Determine the oxidation state of the central atom.

Question 14

Which of the following molecules is polar due to its shape and bond polarity?

Accepted Answer

H$$_2O$$

Question 15

What is the correct name for the compound MgCl$$_2$$?

Accepted Answer

Magnesium chloride

Question 16

Which of the following is a property of ionic compounds?

Accepted Answer

They are solids at room temperature.

Question 17

A protein's secondary structure is primarily stabilized by which type of attractive force?

Accepted Answer

Hydrogen bonds between backbone atoms

Question 18

Which formula represents the compound formed between Al$$^{3+}$$ and O$$^{2-}$$ ions?

Accepted Answer

Al$$_2O$_3$$

Question 19

Which molecule has a tetrahedral shape?

Accepted Answer

CH$$_4$$

Question 20

Which of the following is the correct formula for nickel(II) sulfide?

Accepted Answer

NiS

Shapes and Polarity of Molecules: VSEPR Theory and Molecular Geometry

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