Deck 4: Chemical Reactions

Question 1

Which one of the statements below is false concerning the following reaction: NH₃(g)+ H₂O NH₄⁺(aq)+ OH−(aq)

A) The double arrows indicate that ammonia,NH₃,is only very slightly soluble in water.
B) The reaction is reversible.
C) When NH₃ is added to H₂O,NH₄⁺ and OH− ions are produced in a 1:1 ratio.
D) When solutions of NH₄⁺ and OH^- are mixed,some ammonia is produced.
E) Ammonia partially reacts with water.

Answer 1

The double arrows indicate that ammonia,NH₃,is only very slightly soluble in water.

Question 2

What are the smallest whole number coefficients the reactants and products when the following molecular equation is correctly balanced? __NH₃(g)+__O₂(g)→ __NO(g)+ __H₂O(g)

A) 1,1,1,1
B) 2,3,2,3
C) 3,2,3,4
D) 3,4,3,4
E) 4,5,4,6

Answer 2

4,5,4,6

Question 3

Which of the following reactions best describes the dissolution of solid CsOH(s)in water?

A) CsOH(s)+ H₂O(l)→ CsO^-(aq)+ H₃O⁺(aq)
B) CsOH(s)→ CsO^-(aq)+ H⁺(aq)
C) CsOH(s)→ Cs⁺(aq)+ OH^-(aq)
D) CsOH(s)→ CsO⁺(aq)+ H^-(aq)
E) CsOH(s)→ CsOH(aq)

Answer 3

CsOH(s)→ Cs⁺(aq)+ OH^-(aq)

Question 4

Which one of the following equations is properly balanced?

A) Sn + 4HNO₃ → SnO₂ + 4NO₂ + 2H₂O
B) 2Na₂SO₄ + 3Bi(NO₃)₃ → Bi₂(SO₄)₃ + 9NaNO₃
C) CH₃CHO + 3O₂ → 2CO₂ + 2H₂O
D) NH₄NO₃ → 2H₂O + N₂
E) Na₂CO₃ + 2H₂SO₄ → Na₂SO₄ + 2H₂O + CO₂

Question 5

Which anion will form a precipitate with Ba²⁺?

A) Cl^-
B) SO₄^2-
C) C₂H₃O₂^-
D) Br^-
E) None of these

Question 6

What is the smallest whole number coefficient for sodium hydroxide when the following equation is balanced? Na₂SO₄ + Al(OH)₃ → Al₂(SO₄)₃ + NaOH

A) 1
B) 2
C) 3
D) 4
E) 6

Question 7

Which of the following compounds is insoluble in water?

A) NH₄Br
B) KBr
C) FeCl₂
D) Hg₂Br₂
E) LiBr

Question 8

Which of the following ions is most likely to form an insoluble compound when combined with sulfate ion?

A) Sr²⁺
B) I^-
C) K⁺
D) Na⁺
E) S^2-

Question 9

A precipitate is expected when an aqueous solution of sodium iodide is added to an aqueous solution of

A) calcium nitrate.
B) barium hydroxide.
C) lead perchlorate.
D) iron(II)chloride.
E) sodium sulfate.

Question 10

The products of the complete combustion of octane,C₈H₁₈,are carbon dioxide and water.Write a balanced chemical equation for this reaction.

A) C₈H₁₈( )→ 8 C(s)+ 9 H₂(g)
B) C₈H₁₈( )+ 25 O₂(g)→ 8 CO₂(g)+ 9 H₂O(g)
C) 2 C₈H₁₈( )+ 25 O₂(g)→ 16 CO₂(g)+ 18 H₂O(g)
D) C₈H₁₈( )+ 16 O₂(g)→ 8 CO₂(g)+ 9 H₂(g)
E) 2 C₈H₁₈( )+ 17 O₂(g)→ 16 CO(g)+ 18 H₂O(g)

Question 11

Which of the following compounds is soluble in water?

A) Al₂S₃
B) Cs₂O
C) CaS
D) Hg₂Cl₂
E) NiO

Question 12

A precipitate will form when aqueous nickel(II)chloride is added to an aqueous solution of ____.

A) SrI₂
B) Cu(NO₃)₂
C) KOH
D) Na₂SO₄
E) NaBr

Question 13

Which anion will form a precipitate with K⁺?

A) Cl^-
B) SO₄^2-
C) C₂H₃O₂^-
D) S^2-
E) none

Question 14

All of the following compounds are insoluble in water except _____.

A) BaCO₃
B) PbF₂
C) Fe(OH)₃
D) Ni(ClO₄)₂
E) PbCrO₄

Question 15

Which of the following equations is not balanced?

A) 2Sb₂OS₂ + 10O₂ → 2Sb₂O₅ + 4SO₃
B) (NH₄)₂Cr₂O₇ → N₂ + 4H₂O + Cr₂O₃
C) C₁₂H₂₂O₁₁ + 12O₂ → 12CO₂ + 11H₂O
D) 2NaCl + Pb(NO₃)₂ → PbCl₂ + 2NaNO₃
E) Fe₃O₄ + 3CO → 3Fe + 3CO₂

Question 16

Metals react with oxygen gas to produce oxides with the general formula M_xO_y.Write a balanced chemical equation for the reaction of titanium with oxygen to yield titanium(IV)oxide.

A) 4 Ti(s)+ O₂(g)→ 2 Ti₂O(s)
B) Ti(s)+ O₂(g)→ TiO₂(s)
C) 2 Ti(s)+ O₂(g)→ 2 TiO(s)
D) Ti(s)+ O(g)→ TiO(s)
E) 8 Ti(s)+ O₂(g)→ 2 Ti₄O(s)

Question 17

A precipitate will form when aqueous Pb(NO₃)₂ is added to an aqueous solution of ____.

A) Cu(NO₃)₂
B) NaI
C) NaCH₃CO₂
D) Pb(ClO₄)₂
E) KNO₃

Question 18

The reaction of chlorine molecule with potassium iodide yields iodine molecule and potassium chloride.Write a balanced chemical equation for this reaction.

A) Cl₂(g)+ KI(s)→ I(s)+ KCl₂(s)
B) Cl₂(g)+ 2 KI(s)→ I₂(s)+ 2 KCl(s)
C) Cl₂(g)+ KI₂(s)→ I₂(s)+ KCl₂(s)
D) Cl(g)+ KI(s)→ I(s)+ KCl(s)
E) Cl₂(g)+ 2 K₂I(s)→ I₂(s)+ 2 K₂Cl(s)

Question 19

All of the following compounds are soluble in water except ____.

A) CoCO₃
B) Cs₂CO₃
C) (NH₄)₂CO₃
D) K₂CO₃
E) Na₂CO₃

Question 20

Which of the following compounds is soluble in water?

A) Fe₂O₃
B) Rb₂O
C) BaS
D) Hg₂I₂
E) ZnO

Question 21

Which of the following would not be depicted as the individual ions on the reactant side of a complete ionic reaction?

A) LiOH
B) HBr
C) SrCl₂
D) CH₃COOH
E) CoCl₃

Question 22

Which of the following compounds acts as a strong base in an aqueous solution?

A) HOCH₂CH₂OH
B) Sr(OH)₂
C) H₃PO₄
D) NH₃
E) HNO₃

Question 23

If an aqueous solution of _____ is added to a mixture of Pb²⁺ and Ba²⁺,the lead ion will precipitate,but the barium ion will remain in solution.

A) NaOH
B) Na₂SO₄
C) K₃PO₄
D) KCO₃
E) NaF

Question 24

Write a balanced equation for the reaction that occurs when hydrogen sulfate ion behaves as a Brønsted-Lowry acid in water.

A) HSO₄^-(aq)+ H₂O( ) H₂SO₄(aq)+ H₃O⁺(aq)
B) SO₄^2-(aq)+ H₂O( ) HSO₄^-(aq)+ OH^-(aq)
C) HSO₄^-(aq)+ H₂O( ) SO₄^2-(aq)+ H₃O⁺(aq)
D) HSO₄^-(aq)+ H₂O( ) H₂SO₄(aq)+ OH^-(aq)
E) H₂SO₄(aq)+ H₂O( ) HSO₄^-(aq)+ H₃O⁺(aq)

Question 25

Which of the following compounds is a weak acid in aqueous solution?

A) HCl
B) H₃PO₄
C) HNO₃
D) HClO₄
E) H₂SO₄

Question 26

Write a balanced chemical equation for the reaction of aqueous solutions of sodium sulfide and zinc(II)chloride.

A) Na₂S(aq)+ ZnCl₂(aq)→ ZnS(s)+ 2 NaCl(aq)
B) Na₂S(aq)+ ZnCl₂(aq)→ ZnS(s)+ 2 NaCl(s)
C) Na₂S(aq)+ ZnCl₂(aq)→ Na₂Zn(s)+ SCl₂(aq)
D) Na₂S(aq)+ ZnCl₂(aq)→ Na₂Zn(aq)+ SCl₂(g)
E) None of these

Question 27

Which of the following compounds cannot be depicted as the individual ions on the reactant side in a complete ionic reaction?

A) CsOH
B) HCl
C) Ca(NO₃)₂
D) CaCO₃
E) Ti(NO₃)₃

Question 28

Which of the following is a weak base in aqueous solution?

A) RbCl
B) KOH
C) NH₃
D) HBr
E) Sr(OH)₂

Question 29

Which of the following products will form on mixing aqueous solutions of Cu(NO₃)₂ and NaOH?

A) Cu(OH)₂(s),Na⁺(aq),and NO₃−(aq)
B) Cu(OH)₂(s)and NaNO₃(s)
C) Cu₂(OH)₂(aq)and NaNO₃(aq)
D) Cu(OH)₂(aq)and NaNO₃(s)
E) Cu(OH)₂(s),N₂(g),and H₂O( )

Question 30

When solutions of barium iodide and lithium sulfate are mixed,the spectator ions in the resulting precipitation reaction are

A) only SO₄^2-.
B) both Li⁺ and I^-.
C) only I^-.
D) only Li⁺.
E) only Ba²⁺.

Question 31

Nitric acid is the product of the reaction of ____ and H₂O.

A) SO₃
B) NO₂
C) N₂
D) NH₃
E) N₃^-

Question 32

Which of the following equation best represents the net ionic equation for the reaction between aqueous solutions of barium chloride and cesium sulfate?

A) 2 H⁺(aq)+ 2 Cl^-(aq)→ 2 HCl(g)
B) Ba²⁺(aq)+ SO₄^2-(aq)→ BaSO₄(s)
C) Ba²⁺(aq)+ 2 Cl^-(aq)+ 2 Cs⁺(aq)+ SO₄^2-(aq)→ BaSO₄(s)+ 2 CsCl(aq)
D) BaCl₂(aq)+ Cs₂SO₄(aq)→ BaSO₄(s)+ 2 CsCl(aq)
E) None of these

Question 33

If an aqueous solution of ____ is added to a mixture of F^- and SO₄^2-,the fluoride ion will precipitate,but the sulfate ion will remain in solution.

A) LiBr
B) HNO₃
C) Pb(ClO₄)₂
D) MgNO₃
E) AlCl₃

Question 34

Write a balanced chemical equation for the reaction of aqueous solutions of magnesium chloride and potassium phosphate.

A) MgCl₂(aq)+ K₃PO₄(aq)→ K₃Mg(s)+ PO₄Cl₂(aq)
B) 3 MgCl₂(aq)+ 2 K₃PO₄(aq)→ 3 K₂Mg(s)+ 2 PO₄Cl₃(aq)
C) MgCl(aq)+ KPO₄(aq)→ MgPO₄(s)+ KCl(aq)
D) MgCl₂(aq)+ 2 KPO₄(aq)→ Mg(PO₄)₂(s)+ 2 KCl(aq)
E) 3 MgCl₂(aq)+ 2 K₃PO₄(aq)→ Mg₃(PO₄)₂(s)+ 6 KCl(aq)

Question 35

What base results when K₂O reacts with water?

A) H₃O⁺(aq)
B) KH(aq)
C) O^2-(aq)
D) KOH(aq)
E) KO^-(aq)

Question 36

Which of the following is a strong acid in aqueous solution?

A) HOCH₂CH₂OH
B) Ca(OH)₂
C) H₃PO₄
D) NH₃
E) HClO₄

Question 37

When aqueous solutions of calcium iodide,CaI₂,and silver nitrate,AgNO₃,are combined,which of the following statements below describes what occurs:

A) A precipitate of Ca(NO₃)₂ forms
B) A precipitate of AgI forms
C) Both Ca(NO₃)₂ and AgI precipitate
D) No precipitate will form

Question 38

Which of the following equations best represents the balanced net ionic equation for the reaction between aqueous solutions of ammonium phosphate and iron(II)nitrate are mixed?

A) 3 Fe²⁺(aq)+ 2 PO₄^3-(aq)→ Fe₃(PO₄)₂(s)
B) 2 NH₄⁺(aq)+ Fe(NO₃)₂(aq)→ 2 NH₄NO₃(aq)+ Fe²⁺(aq)
C) 3 Fe²⁺(aq)+ 2 PO₄^3-(aq)→ Fe₃(PO₄)₂(aq)
D) 2 (NH₄)₃PO₄(aq)+ 3 Fe²⁺(aq)→ Fe₃(PO₄)₂(s)+ 6 NH₄⁺(aq)
E) 2 (NH₄)₃PO₄(aq)+ 3 Fe(NO₃)₂(aq)→ Fe₃(PO₄)₂(s)+ 6 NH₄NO₃(aq)

Question 39

What is the balanced equation for carbonate ion (CO₃^2-)acting as a Brønsted base in a reaction with water?

A) CO₃^2-(aq)+ 3 H₂O( ) CO₄^4-(aq)+ 2 H₃O⁺(aq)
B) CO₃^2-(aq)+ H₂O( ) HCO₃^-(aq)+ OH^-(aq)
C) CO₃^2-(aq)+ H₂O( ) CO₂(g)+ 2 OH^-(aq)
D) CO₃^2-(aq)+ 2 H₂O( ) HCO₃^-(aq)+ H₃O⁺(aq)
E) CO₃^2-(aq)+ H₂O( ) H₂CO₄^2-(aq)

Question 40

What is the net ionic equation for the reaction of aqueous sodium hydroxide and aqueous iron(II)chloride?

A) Na⁺(aq)+ OH^-(aq)→ NaOH(s)
B) Na⁺(aq)+ Cl^-(aq)→ NaCl(s)
C) Fe²⁺(aq)+ 2 OH^-(aq)→ Fe(OH)₂(s)
D) Fe²⁺(aq)+ OH^-(aq)→ FeOH⁺(s)
E) Fe²⁺(aq)+ 2 Cl^-(aq)→ FeCl₂(s)

Question 41

Hydrocyanic acid,HCN,is a weak acid.Write a net ionic equation for the reaction of aqueous hydrocyanic acid and aqueous sodium hydroxide.

A) HCN(aq)+ NaOH(aq)→ Na⁺(aq)+ CN^-(aq)+ H₂O( )
B) HCN(aq)+ H₂O(aq)→ CN^-(aq)+ H₃O⁺(aq)
C) H⁺(aq)+ OH^-(aq)→ H₂O( )
D) HCN(aq)+ OH^-(aq)→ CN^-(aq)+ H₂O( )
E) H⁺(aq)+ NaOH(aq)→ Na⁺(aq)+ H₂O( )

Question 42

What is the oxidation number of each atom in sodium hydrogen carbonate,NaHCO₃?

A) Na = +1,H = -1,C = +6,and O = -2
B) Na = +1,H = +1,C = +4,and O = -2
C) Na = +1,H = -1,C = +2,and O = -2
D) Na = -1,H = +1,C = 0,and O = -2
E) Na = +1,H = -1,C = 0,and O = 0

Question 43

What is the oxidation number of P in NH₄(H₂PO₄)?

A) -2
B) -3
C) 5
D) 1
E) 3

Question 44

Which species in the reaction below undergoes reduction? H₂O(g)+ CO(g)→ H₂(g)+ CO₂(g)

A) H₂O
B) CO
C) H₂
D) CO₂
E) None

Question 45

Which of the following is the correct net ionic equation for the reaction between aqueous ammonia and hydrobromic acid?

A) HBr(aq)+ NH₃(aq)→ NH₄Br(aq)
B) H⁺(aq)+ OH^-(aq)→ H₂O( )
C) HBr(aq)+ OH^-(aq)→ Br^-(aq)+ H₂O( )
D) H⁺(aq)+ NH₃(aq)→ NH₄⁺(aq)
E) H⁺(aq)+ Br^-(aq)+ NH₃(aq)→ NH₄⁺(aq)+ Br^-(aq)

Question 46

Which species is reduced in the reaction below? I^-(aq)+ ClO^-(aq)→ IO^-(aq)+ Cl^-(aq)

A) I^-
B) H₂O
C) Cl^-
D) IO^-
E) ClO^-

Question 47

Write a balanced chemical equation for the reaction of aqueous solutions of ammonium sulfate and sodium hydroxide.

A) (NH₄)₂SO₄(aq)+ 2 NaOH(aq)→ 2 NH₄OH(aq)+ SO₃(g)+ Na₂O(aq)
B) (NH₃)₂SO₄(aq)+ NaOH(aq)→ 2 NH₃(g)+ NaOHSO₄(aq)
C) (NH₃)₂SO₄(aq)+ 2 NaOH(aq)→ 2 NH₃(g)+ Na₂SO₄(aq)+ 2 OH−(aq)
D) (NH₄)₂SO₄(aq)+ 2 NaOH(aq)→ 2 NH₄⁺(g)+ Na₂SO₄(aq)+ 2 OH−(aq)
E) (NH₄)₂SO₄(aq)+ 2 NaOH(aq)→ 2 NH₃(g)+ 2 H₂O( )+ Na₂SO₄(aq)

Question 48

Write a balanced net ionic equation for the reaction of aqueous solutions of baking soda (NaHCO₃)and acetic acid.

A) HCO₃^-(aq)+ CH₃CO₂H(aq)→ CH₃CO₂^-(aq)+ H₂O( )+ CO₂(g)
B) 2 NaHCO₃(aq)+ CH₃CO₂H(aq)→ 2 Na₂CO₃(aq)+ CH₄(aq)+ 2H₂O( )+ CO₂(g)
C) NaHCO₃(aq)+ H⁺(aq)→ H₂CO₃(s)+ Na⁺(aq)
D) HCO₃^-(aq)+ H⁺(aq)→ H₂O( )+ CO₂(g)
E) HCO₃^-(aq)+ H⁺(aq)→ H₂CO₃(aq)

Question 49

Which molecule in the reaction below is the oxidizing agent? 2 C₂H₆(g)+ 7 O₂(g)→ 4 CO₂(g)+ 6 H₂O(g)

A) C₂H₆
B) O₂
C) H₂O
D) CO₂
E) None

Question 50

Which of the following compounds will produce a basic solution when dissolved in water?

A) CaO
B) NaHSO₄
C) CO₂
D) SO₂
E) KCl

Question 51

What are the spectator ions in the reaction between aqueous hydroiodic acid and aqueous sodium hydroxide?

A) Na⁺ only
B) H⁺ and OH^-
C) Na⁺ and I^-
D) I^- only
E) H⁺,I^-,Na⁺,and OH^-

Question 52

The net ionic equation for the reaction of calcium carbonate with nitric acid is

A) CaCO₃(s)+ 2H⁺(aq)→ Ca²⁺(aq)+ CO₂(g)+ H₂O( ).
B) Ca²⁺(aq)+ CO₃^2-(aq)+ 2H⁺(aq)+ 2NO₃^-(aq)→ Ca(NO₃)₂(aq)+ CO₂(g)+ H₂O( ).
C) CaCO₃(s)+ 2HNO₂(aq)→ Ca²⁺(aq)+ 2NO₂^-(aq)+ CO₂(g)+ H₂O( ).
D) Ca(HCO₃)₂(s)+ 2HNO₃(aq)→ Ca²⁺(aq)+ 2NO₃^-(aq)+ CO₂(g)+ 2H₂O( ).
E) CaCO₃(s)+ 2HNO₃(aq)→ Ca²⁺(aq)+ 2NO₃^-(aq)+ CO₂(g)+ H₂O( ).

Question 53

What is the net ionic equation for the neutralization of hydrochloric acid with aqueous potassium hydroxide?

A) H⁺(aq)+ OH^-(aq)→ H₂O( )
B) H⁺(aq)+ Cl^-(aq)+ K⁺(aq)+ OH^-(aq)→ KCl(aq)+ H₂O( )
C) H⁺(aq)+ Cl^-(aq)+ K⁺(aq)+ OH^-(aq)→ HCl(aq)+ KOH(aq)
D) HCl(aq)+ K⁺(aq)+ OH^-(aq)→ KCl(aq)+ H₂O( )
E) HCl(aq)+ KOH(aq)→ KCl(aq)+ H₂O( )

Question 54

What is the oxidation number of Fe in BaFeO₄?

A) 2
B) -2
C) 6
D) +3
E) 0

Question 55

In the reaction below,which species is oxidized? 3 Rb₂S(s)+ 8 H⁺(aq)+ 2 NO₃^-(aq)→ 6 Rb⁺(aq)+ 3 S(s)+ 2 NO(g)+ 4 H₂O

A) NO₃^-
B) Rb₂S
C) Rb⁺
D) NO
E) H⁺

Question 56

Metal oxides react with water to produce ____.

A) bases
B) hydrogen gas
C) oxygen gas
D) acids
E) hydronium ions

Question 57

In the reaction of acetic acid with aqueous lithium hydroxide,what is the spectator ion?

A) OH^-(aq)
B) There is no spectator ion.
C) C₂H₃O₂^-(aq)
D) Li⁺(aq)
E) H⁺(aq)

Question 58

Which of the following is a weak electrolyte in aqueous solution?

A) Mg(OH)₂
B) NH₃
C) LiOH
D) KOH
E) Sr(OH)₂

Question 59

Which of the following is/are spectator ions in the reaction between aqueous nitric acid and ammonia?

A) H⁺
B) NO₃^-
C) H⁺ and NH₄⁺
D) NO₃^- and NH₄⁺
E) H⁺,NO₃^-,and NH₄⁺

Question 60

The oxidation number of chlorine is highest in which of the following?

A) HCl
B) Cl₂
C) HClO₂
D) NaClO₃
E) ClO₂−

Question 61

Which of the following is not an oxidation−reduction reaction?

A) CaCO₃(s)→ CaO(s)+ CO₂(g)
B) 2 Na(s)+ Br₂(g)→ 2 NaBr(g)
C) Fe(s)+ 2 HCl(aq)→ FeCl₂(aq)+ H₂(g)
D) 2 C(s)+ O₂(g)→ 2 CO(g)
E) 2 H₂O( )→ 2 H₂(g)+ O₂(g)

Question 62

Identify a true statement about oxidation numbers.

A) Each atom in an element has an oxidation number of 1.
B) For monoatomic ions,the oxidation number is equal to the charge on the ion.
C) The oxidation number of H is 0 in most of the compounds.
D) The oxidation number of O is +2 in most of the compounds.
E) Fluorine always has an oxidation number of +1 in most of the compounds.

Question 63

Which of the following chemical equations is an acid-base reaction?

A) Ba(OH)₂(aq)+ K₂SO₄(aq)→ BaSO₄(s)+ 2 KOH(aq)
B) 3 NaOH(aq)+ AlCl₃(aq)→ Al(OH)₃(s)+ 3 NaCl(aq)
C) 2 H⁺(aq)+ Zn(s)→ H₂(g)+ Zn²⁺(aq)
D) 2 HCl(aq)+ Pb(NO₃)₂(aq)→ PbCl₂(s)+ 2 HNO₃(aq)
E) H₃PO₄(aq)+ NH₃(aq)→ NH₄⁺(aq)+ H₂PO₄−(aq)

Question 64

Which of the following elements generally acts as an oxidizing agent?

A) Br₂
B) H₂
C) Fe
D) C
E) Li

Question 65

Ionic and molecular compounds that form ions in aqueous solution are called _____.

Question 66

A(n)_____ agent gains electrons in an oxidation-reduction reaction.

Question 67

If an aqueous sodium hydroxide solution is left in contact with air,the concentration of hydroxide ion gradually decreases.The process can be hastened if a person exhales over a sodium hydroxide solution.Write a balanced chemical equation that describes the process by which the hydroxide ion concentration decreases.

Question 68

Give the name of an acidic oxide and write a balanced chemical equation for the reaction of the oxide with water.

Question 69

A solution is a homogeneous mixture composed of one or more ____________ dissolved in a solvent.

Question 70

The net ionic equation for the reaction of barium chloride and sodium sulfate is shown below.
Ba²⁺(aq)+ SO₄^2-(aq)→ BaSO₄(s)
Chloride and sodium ions are referred to as ________ ions because they are not involved in the reaction.

Question 71

________ acid is produced in a larger quantity than any other chemical in the United States.This chemical is used in the production of fertilizers,pigments,alcohol,paper and detergents.

Question 72

_____-oxides produce acids when reacted with water.