Deck 3: Chemical Compounds

Question 1

Which of the following is classified as a molecular compound?

A)OH^-
B)N₂
C)SO₂
D)Mg(NO₃)₂
E)all of these

Answer 1

SO₂

Question 2

Rank the boiling points of the following compounds from lowest to highest: CO₂, LiF, H₂O

A)CO₂ < H₂O < LiF
B)CO₂ < LiF < H₂O
C)LiF < CO₂ < H₂O
D)H₂O < LiF < CO₂
E)H₂O < CO₂ < LiF

Answer 2

CO₂ < H₂O < LiF

Question 3

Which of the substances shown in the figure is an ionic compound?

A)K₂S
B)Na₂SO₄
C)SO₂
D)Both Na₂SO₄ and SO₂
E)Both K₂S and Na₂SO₄

Answer 3

Both K₂S and Na₂SO₄

Question 4

Rank the boiling points of the following compounds from lowest to highest: N₂, MgO, C₂H₅OH (ethyl alcohol)

A)MgO < C₂H₅OH (ethyl alcohol)< N₂
B)MgO < N₂ < C₂H₅OH (ethyl alcohol)
C)N₂ < MgO < C₂H₅OH (ethyl alcohol)
D)N₂ < C₂H₅OH (ethyl alcohol)< MgO
E)C₂H₅OH (ethyl alcohol)< N₂ < MgO

Question 5

Which of the following combinations of elements in a compound would be ionic?

A)barium and fluorine
B)hydrogen and sulfur
C)sulfur and oxygen
D)hydrogen and fluorine
E)all of these

Question 6

The name of the oxoanion of sulfur with a 2− charge shown in the figure is

A)sulfite ion.
B)sulfate ion.
C)sulfide ion.
D)sulfurous ion.
E)sulfoxate ion.

Question 7

Which combination of formula and name is incorrect?

A)Na⁺ = sodium ion
B)Ca²⁺ = calcium ion
C)N^2- = nitride ion
D)F^- = fluoride ion
E)O^2- = oxide ion

Question 8

Which of the following is classified as an ionic compound?

A)NO₂
B)CF₄
C)CH₃OH
D)CaCO₃
E)all of these

Question 9

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

A)Br₂
B)Br₂^-
C)Br₂^2-
D)Br^-
E)BrO₃^-

Question 10

Which of the following statements regarding ionic and molecular compounds is correct?

A)Molecular compounds are expected to have very high melting and boiling points compared to ionic compounds.
B)Molecular compounds are strong electrolytes in aqueous solution.
C)An ionic compound can be a gas, liquid, or solid at room temperature.
D)Molecular compounds form crystalline solids that are hard and brittle.
E)Ionic compounds are expected to have very high melting and boiling points compared to ionic compounds.

Question 11

The name of the oxoanion of nitrogen with a 1− charge shown in the figure is

A)nitrooxate ion.
B)nitride ion.
C)nitrite ion.
D)nitrate ion.
E)nitrous ion.

Question 12

The name of the oxoanion of nitrogen with a 1− charge shown in the figure is

A)nitrooxate ion.
B)nitride ion.
C)nitrite ion.
D)nitrate ion.
E)nitrous ion.

Question 13

Which combination of formula and name is incorrect?

A)S²⁻ = sulfide ion
B)Br⁻ = bromide ion
C)Li⁺ = lithium ion
D)Sr⁺ = strontium ion
E)P³⁻ = phosphide ion

Question 14

Rank the boiling points of the following compounds from lowest to highest: C₁₂H₂₂O₁₁ (sucrose), O₂, NaF

A)C₁₂H₂₂O₁₁ (sucrose)< O₂ < NaF
B)O₂ < NaF < C₁₂H₂₂O₁₁ (sucrose)
C)O₂ < C₁₂H₂₂O₁₁ (sucrose)< NaF
D)NaF < O₂ < C₁₂H₂₂O₁₁ (sucrose)
E)NaF < C₁₂H₂₂O₁₁ (sucrose)< O₂

Question 15

Which of the following combinations of elements in a compound would be ionic?

A)sodium and sulfur
B)nitrogen and sulfur
C)phosphorus and fluorine
D)hydrogen and oxygen
E)all of these

Question 16

Which of the following combinations of elements in a compound would be molecular?

A)sodium and nitrogen
B)calcium and oxygen
C)nitrogen and oxygen
D)potassium and chlorine
E)sodium and sulfur

Question 17

The figure shows all but which of the following?

A)two elements and a compound
B)a chemical reaction
C)one mixture and one pure substance
D)three compounds

Question 18

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

A)N₂
B)NO₂^-
C)NO₃^-
D)N₂^3-
E)N^3-

Question 19

Which combination of formula and name is incorrect?

A)K⁺ = potassium ion
B)I^- = iodide ion
C)Mg⁺ = magnesium ion
D)S^2- = sulfide ion
E)N^3- = nitride ion

Question 20

Which of the substances shown in the figure is a molecular compound?

A)Na₃N
B)KNO₃
C)NO₂
D)Both Na₃N and KNO₃
E)Both KNO₃ and NO₂

Question 21

Based on common charges, which formula for an ionic compound is incorrect?

A)NaClO₃
B)Sr(NO₃)₂
C)AlCl₃
D)KI
E)MgBr

Question 22

Which of the following formulas for a compound containing the Cu²⁺ ion is incorrect?

A)Cu(NO₃)₂
B)CuS
C)CuN
D)CuSO₄
E)CuSO₃

Question 23

The formula for the chlorate ion is ClO₃⁻. What is the formula for the perchlorate ion?

A)ClO₄^-
B)ClO₂^-
C)ClO^-
D)ClO₃^2-
E)PClO₃^-

Question 24

Which of the following combinations of formula and name is incorrect?

A)hydroxide ion = OH^-
B)nitrate ion = NO₃^-
C)sulfide ion = SO₃^2-
D)nitrite ion = NO₂^-
E)sulfate ion = SO₄^2-

Question 25

Based on common charges, which formula for an ionic compound is incorrect?

A)Ba(NO₃)₂
B)Ca(OH)₂
C)MgCl₃
D)Al₂O₃
E)KBr

Question 26

Which of the following combinations of formula and name is incorrect?

A)carbonate ion = CO₃^2-
B)ammonium ion = NH₃
C)bicarbonate ion = HCO₃^-
D)periodate ion = IO₄^-
E)hypochlorite ion = ClO^-

Question 27

The formula for the acetate ion is:

A)CH₃CO₂^-
B)CH₂CO₃^-
C)CH₃CO₂^2-
D)CH₃CO₂^3-
E)CH₂CO₂^-

Question 28

The formula for the permanganate ion is:

A)MnO₄^-
B)MnO₂^2-
C)MnO₃^-
D)MnO₃^2-
E)MnO₄^2-

Question 29

Based on common charges, which formula for an ionic compound is incorrect?

A)Li₂S
B)CaO
C)Na₃N
D)K₂Cl
E)Mg(OH)₂

Question 30

Based on common charges, which formula for an ionic compound is incorrect?

A)LiCO₃
B)NaBr
C)CaO
D)SrS
E)MgCl₂

Question 31

The formula for the bromate ion is BrO₃⁻. What is the formula for the bromite ion?

A)BrO₄⁻
B)BrO₂⁻
C)BrO⁻
D)BrO₃²⁻
E)Br⁻

Question 32

The formula for the ammonium ion is:

A)NH₃⁺
B)NH₃
C)NH₄⁺
D)NH₄
E)NH₄^-

Question 33

The formula for the iodate ion is IO₃^-. What is the formula for the hypoiodite ion?

A)IO₄^-
B)IO₂^-
C)IO^-
D)IO₃^2-
E)I^-

Question 34

The formula for the bicarbonate ion is:

A)C₂O₃^2-
B)CO₃^2-
C)HCO₃^2-
D)HCO₃^-
E)C₂O₄^2-

Question 35

The formula for the phosphate ion is:

A)PO₃^2-
B)PO₃^4-
C)PO₃^3-
D)PO₄^2-
E)PO₄^3-

Question 36

Which of the following combinations of formula and name is incorrect?

A)nitride ion = NO₂^-
B)cyanide ion = CN^-
C)chlorite ion = ClO₂^-
D)perchlorate ion = ClO₄^-
E)chloride ion = Cl^-

Question 37

Which of the following formulas for a compound containing the Fe²⁺ ion is incorrect?

A)FeO
B)FeCl
C)FeS
D)FeSO₄
E)Fe(NO₃)₂

Question 38

Based on common charges, which formula for an ionic compound is incorrect?

A)CaCl
B)NaF
C)SrO
D)MgS
E)K₃P

Question 39

Which of the following formulas for a compound containing the Fe³⁺ ion is incorrect?

A)FeS
B)Fe₂S₃
C)FeN
D)FePO₄
E)FeBr₃

Question 40

The formula for the chlorite ion is:

A)ClO^-
B)ClO₂^-
C)ClO₃^-
D)ClO₄^-
E)ClO₂^2-

Question 41

Which of the following formula/name pairs is incorrect?

A)K₂SO₄ potassium sulfate
B)Na₃N sodium nitride
C)Li₂CO₃ lithium carbonate
D)Fe₂O₃ iron(II)oxide
E)Cu₂S copper(I)sulfide

Question 42

What is the correct formula for the compound formed between copper(II)ion and the phosphide ion?

A)CuPO₄
B)Cu₂PO₄
C)Cu₃(PO₄)₂
D)Cu₃P₂
E)CuP

Question 43

What is the correct formula for the compound chromium(III)sulfide?

A)CrS
B)Cr₃S
C)CrS₃
D)Cr₃S₂
E)Cr₂S₃

Question 44

What is the correct formula for the compound formed between the aluminum ion and the sulfide ion?

A)Al₃S₂
B)AlS
C)Al₂S
D)AlS₂
E)Al₂S₃

Question 45

What is the correct formula for the compound formed between iron(III)ion and the oxide ion?

A)FeO
B)Fe₂O₃
C)Fe₃O₂
D)Fe₃O₄
E)FeO₃

Question 46

What is the correct formula for the compound formed between the aluminum ion and the hydroxide ion?

A)AlOH
B)Al(OH)₂
C)Al(OH)₃
D)Al₃OH
E)AlH₃

Question 47

What is the correct formula for the compound formed between the calcium ion and the sulfate ion?

A)CaSO₄
B)Ca₂(SO₄)₂
C)Ca(SO₄)₂
D)CaS
E)CaSO₃

Question 48

Which of the following formula/name pairs is incorrect?

A)MnO manganese(II)oxide
B)CaO calcium oxide
C)MgCl₂ magnesium chloride
D)AlP aluminum phosphide
E)Li₂SO₃ dilithium sulfite

Question 49

Which of the following formula/name pairs is incorrect?

A)RbS rubidium sulfide
B)K₂CO₃ potassium carbonate
C)NaClO₄ sodium chloroxate
D)Fe₂S₃ iron(III)sulfide
E)K₂O potassium oxide

Question 50

What is the correct formula for the compound formed between the cobalt(III)ion and the sulfate ion?

A)CoSO₄
B)Co₂(SO₄)₃
C)Co₃(SO₄)₂
D)Co₂S₃
E)CoS₃

Question 51

What is the formula for a compound composed of Ca²⁺ ions and PO₄³⁻ ions?

A)CaPO₄
B)Ca₂(PO₄)₃
C)Ca₃(PO₄)₂
D)Ca(PO₄)₂
E)Ca(PO₄)₃

Question 52

Which of the following formulas for a compound containing the Cr²⁺ ion is incorrect?

A)CrClO₄
B)CrSO₄
C)CrO
D)CrS
E)CrCl₂

Question 53

The images in the figure represent aqueous solutions of ionic compounds. Which could correspond to Na₂S?

A)I only
B)II only
C)III only
D)I and III
E)II and III

Question 54

What is the formula for a compound composed of Cr³⁺ ions and SO₃^2- ions?

A)CrSO₃
B)Cr₂(SO₃)₃
C)Cr₃(SO₃)₂
D)Cr(SO₃)₂
E)Cr(SO₃)₃

Question 55

Which of the following formula/name pairs is incorrect?

A)BaBr₂ barium bromide
B)CuO copper(II)oxide
C)MgCl₂ magnesium dichloride
D)Sr(OH)₂ strontium hydroxide
E)LiNO₃ lithium nitrate

Question 56

Which of the following formulas for a compound containing the Cr³⁺ ion is incorrect?

A)Cr(OH)₃
B)Cr₂(SO₄)₃
C)CrN
D)CrNO₃

Question 57

What is the correct formula for the compound lead(IV)oxide?

A)PbO₂
B)PbO₄
C)Pb₂O
D)Pb₄O
E)PbO

Question 58

Which of the following formula/name pairs is incorrect?

A)FeO iron(II)oxide
B)K₂SO₄ potassium sulfide
C)MnO₂ manganese(IV)oxide
D)LiOH lithium hydroxide
E)MgO magnesium oxide

Question 59

Which of the following formulas for a compound containing the Cu²⁺ ion is incorrect?

A)CuO
B)CuP
C)CuCO₃
D)CuSO₄
E)CuCl₂

Question 60

The images in the figure represent aqueous solutions of ionic compounds. Which could correspond to BaCl₂?

A)I only
B)II only
C)III only
D)I and III
E)II and III

Question 61

Which of the following compound names is not correct?

A)iron(III)sulfate
B)copper(II)diphosphide
C)sodium hydroxide
D)potassium nitrate
E)calcium sulfide

Question 62

Which of the following is the correct formula for the compound with the name iron(II)phosphate?

A)FeP
B)Fe₃(PO₄)₂
C)FePO₄
D)Fe₂(PO₃)₃
E)Fe₂(PO₄)₃

Question 63

Which of the following is the correct name for the compound CoBr₂?

A)cobalt bromide
B)cobalt(II)bromide
C)cobalt dibromide
D)cobalt(II)bromate
E)cobalt(IV)bromide

Question 64

Suppose you need iron(II)phosphate for an experiment. Which of these compounds would you use?

A)FeP
B)Fe₃P₂
C)Fe₂(PO₄)₃
D)Fe₂P₃
E)Fe₃(PO₄)₂

Question 65

The formula for barium carbonate is:

A)Ba₂CO₃
B)BaCO₃
C)BaCO₂
D)BaCO

Question 66

The correct formulas for the compounds in the figure are:

A)NF₃, P₄O₁₀, C₂H₄Cl₂
B)NF₃, P₄O_8, C₂H₄Cl₂
C)NF₃, P₄O₁₀, C₂H₂Cl₄
D)NF₄, P₃O₁₀, C₂H₂Cl₄
E)NF₄, P₃O₁₀, C₂H₂Cl₂

Question 67

Which of the following is the correct formula for the compound with the name manganese(II)phosphate?

A)Mn₃(PO₄)₂
B)Mn₂(PO₄)₃
C)MnPO₄
D)Mn₃P₂
E)Mn₂P₃

Question 68

The compound ClO₃ is a dark brown solid powder that is not stable above 25ºC. Name this molecular compound.

A)chlorine trioxide
B)chlorine oxide
C)chlorate
D)chlorite
E)chlorine(VI)oxide

Question 69

The compound SO₂ is a colorless gas with a boiling of -10°C. Name this molecular compound.

A)sulfate
B)sulfite
C)sulfur(IV)oxide
D)sulfur dioxide
E)sulfur(II)oxide

Question 70

Which of the following is the correct formula for the compound with the name copper(II)sulfate?

A)Cu₂S
B)CuS₂
C)Cu₂SO₄
D)CuSO₄
E)CuSO₃

Question 71

Which of the following compound names is not correct?

A)calcium hydroxide
B)iron(II)dichloride
C)potassium fluoride
D)sodium cyanide
E)ammonium hydroxide

Question 72

The correct formulas for the compounds in the figure are:

A)Cl₃P, Cl₆S, C₃H₂F₆
B)PCl₃, SCl₆, C₃H₆F₂
C)PCl₃, SCl₄, C₃H₆F₃
D)P₃Cl, S₆Cl, C₃H₆F₂
E)PCl₃, SCl₈, C₃H₆F₂

Question 73

Which of the following compound names is not correct?

A)strontium dinitrate
B)sodium oxide
C)copper(II)carbonate
D)potassium permanganate
E)silver chloride

Question 74

The compound NO₂ is a reddish brown gas with a boiling of 21°C. Name this molecular compound.

A)nitrogen (IV)oxide
B)nitrogen dioxide
C)nitrogen oxide
D)nitrate
E)nitrite

Question 75

Which of the following is the correct formula for the compound with the name aluminum sulfide?

A)AlS
B)Al₃S₂
C)Al₂S₃
D)AlSO₄
E)Al₂(SO₄)₃

Question 76

The formula for calcium nitrate is:

A)CaNO₃
B)Ca₂NO₃
C)Ca(NO₃)₂
D)Ca(NO₃)₃
E)Ca(NO₂)₂

Question 77

The formula for copper(I)sulfide is:

A)CuS
B)CuS₂
C)Cu₂S
D)CuSO₄
E)Cu₂SO₄

Question 78

Which of the following is the correct name for the compound FeSO₄?

A)iron(II)sulfate
B)iron(IV)sulfate
C)iron sulfate
D)iron sulfur tetroxide
E)iron sulfite

Question 79

Which of the following is the correct formula for the compound with the name calcium nitride?

A)CaN
B)Ca₃N₂
C)Ca₂N₃
D)CaN₂
E)Ca₂N

Question 80

Which of the following is the correct name for the compound Mn₂O₃?

A)dimanganese trioxide
B)manganate ion
C)manganese(III)oxide
D)manganese(II)oxide
E)manganese oxide