Question 1

Which of the following compounds contains both polar covalent and ionic bonds?

Accepted Answer

NaNO3

Question 2

Which statement best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Question 3

Which of the following molecules is nonpolar?

Accepted Answer

CO2

Question 4

What is the bond angle in a molecule with a tetrahedral geometry?

Accepted Answer

$109.5^\circ$

Question 5

Which of the following best explains why ionic compounds tend to have higher melting points than covalent compounds?

Accepted Answer

Ionic compounds have stronger electrostatic attractions between ions.

Question 6

Which of the following is the correct Lewis structure for the carbonate ion ($CO_3^{2-}$)?

Accepted Answer

A structure with one double bond and two single bonds between C and O, with resonance among the oxygens.

Question 7

Which molecule has a bent molecular geometry and a bond angle of approximately $104.5^\circ$?

Accepted Answer

H2O

Question 8

Which of the following compounds is most likely to conduct electricity when dissolved in water?

Accepted Answer

NaCl

Question 9

What is the correct formula for ammonium sulfate?

Accepted Answer

$(NH_4)_2SO_4$

Question 10

Which of the following best describes a polar covalent bond?

Accepted Answer

A bond in which electrons are shared unequally between two atoms, resulting in partial charges.

Question 11

Which of the following molecules is expected to be polar?

Accepted Answer

NH3

Question 12

Which statement about VSEPR theory is correct?

Accepted Answer

VSEPR theory predicts the shape of a molecule based on the repulsion between electron pairs around the central atom.

Question 13

Which of the following ions has an octet of electrons in its Lewis structure?

Accepted Answer

$SO_4^{2-}$

Question 14

A student has two solid compounds: one ionic and one covalent. Which test could the student use to determine which is which?

Accepted Answer

Test their melting points; the ionic compound will have a higher melting point.

Question 15

Which of the following best describes the electron arrangement in a nonpolar covalent bond?

Accepted Answer

Electrons are shared equally between two atoms.

Question 16

Which of the following molecules has a linear geometry?

Accepted Answer

CO2

Question 17

Which of the following is the correct formula for phosphite ion?

Accepted Answer

$PO_3^{3-}$

Question 18

Which of the following statements about bond angles is correct?

Accepted Answer

The bond angle in $CH_4$ is $109.5^\circ$.

Question 19

Which of the following best explains why $H_2O$ is a polar molecule?

Accepted Answer

The molecule has a bent shape and the electrons are not shared equally.

Question 20

Which of the following compounds is an example of a Type I binary ionic compound?

Accepted Answer

NaCl

Bonding, Molecular Structure, and VSEPR Theory: Study Notes for General Chemistry

Study Guide - Practice Questions