The formation of a gas is evidence of. 1. A chemical change. 2. A physical change. 3. No change in energy 4. Both (1) and (2)
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1 Chapter 8 Review
2 The formation of a gas is evidence of 1. A chemical change. 2. A physical change. 3. No change in energy 4. Both (1) and (2)
3 The formation of a gas is evidence of 1. A chemical change. 2. A physical change. 3. No change in energy 4. Both (1) and (2)
4 Which of the following may be evidence of a chemical change? 1. Release of energy as heat 2. Production of sound 3. Reduction in temperature 4. All of the above
5 Which of the following may be evidence of a chemical change? 1. Release of energy as heat 2. Production of sound 3. Reduction in temperature 4. All of the above
6 In the word equation, iron + copper (II) sulfate iron (II) sulfate + copper, a product is 1. Iron (II) sulfate. 2. Copper. 3. Iron. 4. both (1) and (2)
7 In the word equation, iron + copper (II) sulfate iron (II) sulfate + copper, a product is 1. Iron (II) sulfate. 2. Copper. 3. Iron. 4. both (1) and (2)
8 In the reaction described by the following equation water + energy hydrogen gas +oxygen gas, energy 1. Can be considered a reactant. 2. Is absorbed. 3. Is released. 4. Both (a) and (b)
9 In the reaction described by the following equation water + energy hydrogen gas +oxygen gas, energy 1. Can be considered a reactant. 2. Is absorbed. 3. Is released. 4. Both (a) and (b)
10 In the unbalanced formula equation carbon + hydrogen methane, the formula CH 4 represents 1. One atom of methane. 2. Five atoms of methane. 3. One molecule of methane. 4. One gram of methane.
11 In the unbalanced formula equation carbon + hydrogen methane, the formula CH 4 represents 1. One atom of methane. 2. Five atoms of methane. 3. One molecule of methane. 4. One gram of methane.
12 From a complete and correctly written chemical equation, you can obtain the 1. Chemical formulas of the reactants and products. 2. Relative amounts of the reactants and products 3. Physical state of the reactants and products. 4. All of the above.
13 From a complete and correctly written chemical equation, you can obtain the 1. Chemical formulas of the reactants and products. 2. Relative amounts of the reactants and products 3. Physical state of the reactants and products. 4. All of the above.
14 In a chemical equation, the formula of a substance in a solid state is followed by the symbol 1. (l) 2. (s) 3. (g) 4. (aq)
15 In a chemical equation, the formula of a substance in a solid state is followed 1. (l) 2. (s) 3. (g) 4. (aq) by the symbol
16 The Greek letter delta ( ) above the arrow in a chemical equation means 1. yields or produces. 2. a catalyst is used in the reaction. 3. the reaction releases energy as heat. 4. the reactants are heated.
17 The Greek letter delta ( ) above the arrow in a chemical equation means 1. yields or produces. 2. a catalyst is used in the reaction. 3. the reaction releases energy as heat. 4. the reactants are heated.
18 For which element(s) are the number of reactant atoms and products atoms equal, KBr + Cl 2 Br 2 + KCl 1. K 2. Cl 3. Br 4. All of the above
19 For which element(s) are the number of reactant atoms and products atoms equal, 1. K 2. Cl 3. Br 4. All of the above KBr + Cl 2 Br 2 + KCl
20 According to the law of conservation of mass, the total mass of the reacting substances is 1. Always more than the total mass of the products. 2. Always less than the total mass of the products. 3. Sometimes more and sometimes less than the total mass of the products. 4. Always equal to the total mass of the products.
21 According to the law of conservation of mass, the total mass of the reacting substances is 1. Always more than the total mass of the products. 2. Always less than the total mass of the products. 3. Sometimes more and sometimes less than the total mass of the products. 4. Always equal to the total mass of the products.
22 In the unbalanced formula equation, SrBr 2 + (NH 4 ) 2 CO 3 SrCO 3 + NH 4 Br which coefficient should be placed to the left of NH 4 Br?
23 In the unbalanced formula equation, SrBr 2 + (NH 4 ) 2 CO 3 SrCO 3 + NH 4 Br which coefficient should be placed to the left of NH 4 Br?
24 Which coefficients would be used to balance the following equation, SrBr 2 + (NH 4 ) 2 CO 3 SrCO 3 + NH 4 Br? 1. 1,2,1,1 2. 1,1,2,1 3. 1,1,1,2 4. 1,1,1,1
25 Which coefficients would be used to balance the following equation, SrBr 2 + (NH 4 ) 2 CO 3 SrCO 3 + NH 4 Br? 1. 1,2,1,1 2. 1,1,2,1 3. 1,1,1,2 4. 1,1,1,1
26 A synthesis reaction is the only type of chemical reaction that 1. Has only one reactant. 2. Can involve the oxidation of organic compounds. 3. Results in the formation of a single product. 4. Both (1) and (3).
27 A synthesis reaction is the only type of chemical reaction that 1. Has only one reactant. 2. Can involve the oxidation of organic compounds. 3. Results in the formation of a single product. 4. Both (1) and (3).
28 Which of the following equations represents a decomposition reaction? 1. 2Sb (s) + 3 I 2 (g) 2SbI 3 (s) 2. 2HgO (s) 2Hg (l) + O 2 (g) 3. FeS (s) + 2 HCl (aq) H 2 S (g) + FeCl 2 (aq) 4. Zn (s) + H 2 SO 4 (aq) ZnSO 4 (aq) + H 2 (g)
29 Which of the following equations represents a decomposition reaction? 1. 2Sb (s) + 3 I 2 (g) 2SbI 3 (s) 2. 2HgO (s) 2Hg (l) + O 2 (g) 3. FeS (s) + 2 HCl (aq) H 2 S (g) + FeCl 2 (aq) 4. Zn (s) + H 2 SO 4 (aq) ZnSO 4 (aq) + H 2 (g)
30 If a metal is placed in an ionic solution containing another metal and no reaction occurs, then the metal originally in the solution is 1. A halogen. 2. Higher on the activity series. 3. Not on the activity series. 4. A catalyst.
31 If a metal is placed in an ionic solution containing another metal and no reaction occurs, then the metal originally in the solution is 1. A halogen. 2. Higher on the activity series. 3. Not on the activity series. 4. A catalyst.
32 The reaction Pb(NO 3 ) 2 + 2KI PBI KNO 3 is a 1. Double displacement reaction. 2. Synthesis reaction. 3. Decomposition reaction. 4. Combustion reaction.
33 The reaction Pb(NO 3 ) 2 + 2KI PBI KNO 3 is a 1. Double displacement reaction. 2. Synthesis reaction. 3. Decomposition reaction. 4. Combustion reaction.
34 The reaction 2C 2 H 2 + 5O 2 4CO H 2 O is a 1. Combustion reaction. 2. Synthesis reaction. 3. Decomposition reaction. 4. Double-displacement reaction.
35 The reaction 2C 2 H 2 + 5O 2 4CO H 2 O is a 1. Combustion reaction. 2. Synthesis reaction. 3. Decomposition reaction. 4. Double-displacement reaction.
36 The reaction Mg + 2HCl H 2 + MgCl 2 is a 1. Synthesis reaction. 2. Decomposition reaction. 3. Single displacement reaction. 4. Double-displacement reaction.
37 The reaction Mg + 2HCl H 2 + MgCl 2 is a 1. Synthesis reaction. 2. Decomposition reaction. 3. Single displacement reaction. 4. Double-displacement reaction.
38 In the reaction Zn (s) + H 2 SO 4 (aq) ZnSO 4 (aq) + H 2 (g), what element has been displaced. 1. Zn 2. H 3. S 4. O
39 In the reaction Zn (s) + H 2 SO 4 (aq) ZnSO 4 (aq) + H 2 (g), what element has been displaced. 1. Zn 2. H 3. S 4. O
40 1. NaOH Based on solubility rules, which compound is insoluble? 2. Cu(NO 3 ) 2 3. Cu(OH) 2 4. All of the above
41 1. NaOH Based on solubility rules, which 2. Cu(NO 3 ) 2 3. Cu(OH) 2 4. All of the above compound is insoluble?
42 Which of the following ions are spectator ions? NaOH + Cu(NO 3 ) 2 Cu(OH) 2 + NaNO 3 1. Na + and OH - 2. Cu2 + and OH - 3. Na + and NO 3-4. Cu 2+ and NO 3 -
43 Which of the following ions are spectator ions? NaOH + Cu(NO 3 ) 2 Cu(OH) 2 + NaNO 3 1. Na + and OH - 2. Cu2 + and OH - 3. Na + and NO Cu 2+ and NO - 3
44 The net ionic equation for the reaction below is, NaOH + Cu(NO 3 ) 2 Cu(OH) 2 + NaNO 3 1. Na+ (aq) + NO 3- (aq) NaNO 3 (s) 2. Cu 2+ (aq) + 2OH - (aq) Cu(OH) 2 (s) 3. Cu 2+ (aq) + 2OH - (aq) NaNO 3 (s) 4. Na + (aq) + NO 3- (aq) Cu(OH) 2 (s)
45 The net ionic equation for the reaction below is, NaOH + Cu(NO 3 ) 2 Cu(OH) 2 + NaNO 3 1. Na+ (aq) + NO 3- (aq) NaNO 3 (s) 2. Cu 2+ (aq) + 2OH - (aq) Cu(OH) 2 (s) 3. Cu 2+ (aq) + 2OH - (aq) NaNO 3 (s) 4. Na + (aq) + NO 3- (aq) Cu(OH) 2 (s)
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