Question 1

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

Accepted Answer

NaNO\_3

Question 2

What is the correct formula for the ammonium ion?

Accepted Answer

$$NH\_4^+$$

Question 3

Which molecule is nonpolar despite having polar bonds?

Accepted Answer

CO\_2

Question 4

A student mixes sodium sulfate ($$Na\_2SO\_4) $$with barium chloride ($$BaCl\_2) in $$water. What type of compound is the precipitate formed?

Accepted Answer

Ionic compound

Question 5

Which of the following ions has the formula $$PO\_4$$^{3-}$$?

Accepted Answer

Phosphate

Question 6

How many sigma ($$\sigma) $$and pi ($$\pi) $$bonds are present in the molecule $$CO\_2$$?

Accepted Answer

2 $$\sigma$$, 2 $$\pi$$

Question 7

Which of the following best describes the electron geometry of $$NH\_3$$?

Accepted Answer

Tetrahedral

Question 8

What is the correct name for the $$ClO\_4^-$$ ion?

Accepted Answer

Perchlorate

Question 9

Which of the following molecules has a bent molecular shape due to lone pairs on the central atom?

Accepted Answer

H\_2O

Question 10

A compound is found to have the formula $$C\_2H\_6O. $$Which of the following is a correct classification for this compound?

Accepted Answer

Molecular compound

Question 11

Which of the following statements about polyatomic ions is TRUE?

Accepted Answer

Polyatomic ions are composed of two or more atoms covalently bonded.

Question 12

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

Accepted Answer

$$CN^-$$

Question 13

What is the molecular geometry of $$CO\_2$$?

Accepted Answer

Linear

Question 14

Which of the following ions is present in baking soda?

Accepted Answer

Bicarbonate ($$HCO\_3^-)$$

Question 15

Which of the following molecules is polar?

Accepted Answer

NH\_3

Question 16

A student is asked to predict whether $$NaCl$$ will conduct electricity when dissolved in water. What is the correct prediction and explanation?

Accepted Answer

Yes, because $$NaCl$$ dissociates into ions in water.

Question 17

Which of the following ions is found in bleach?

Accepted Answer

Hypochlorite ($$ClO^-)$$

Question 18

Which of the following best describes the bonding in $$O\_2$$?

Accepted Answer

One sigma ($$\sigma) $$and two pi ($$\pi) $$bonds

Question 19

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

Accepted Answer

$$SO\_4$$^{2-}$$

Question 20

A molecule has the formula $$BF\_3. $$What is its molecular geometry and is it polar or nonpolar?

Accepted Answer

Trigonal planar, nonpolar

Study Guide: Molecules, Compounds, and Chemical Bonding

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