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Name ____________________________________________________
Unit 6: Chemical Reactions
Date ________________________________
Multiple Choice Questions
1. During all chemical reactions, mass, charge, and energy are
(1) absorbed
(2) conserved
(3) formed
(4) released
2. Which equation is correctly balanced?
(1) H2 + O2  H2O
(2) N2 + H2  NH3
(3) 2 NaCl  Na + Cl2
(4) 2 KCl  2 K + Cl2
3. When the equation C2H6 + O2  CO2 + H2O is correctly balanced, the coefficient in front
of O2 will be
(1) 7
(2) 10
(3) 3
(4) 4
4. Given the balanced equation with an unknown compound represented by X:
C6H12O6 (aq)  2 X + 2 CO2 (g)
Which compound is represented by X?
(1) CH3OH (aq)
(2) CH2(OH)4 (aq) (3) CH3CH2OH (aq)
(4) CH2OHCH2OH (aq)
5. When the equation SiO2 + C  SiC + CO is balanced, the sum of all coefficients is
(1) 6
(2) 7
(3) 8
(4) 9
6. Which term identifies a type of chemical reaction?
(1) decomposition
(2) distillation
(3) sublimation
(4) vaporization
7. Given the balanced equation representing a reaction:
K2CO3 (aq) + BaCl2 (aq)  2 KCl (aq) + BaCO3 (s)
Which type of reaction is represented by this equation?
(1) synthesis (2) decomposition (3) single replacement
8. Given the balanced equation:
(4) double replacement
2 KI + F2  2 KF + I2
Which type of chemical reaction does this equation represent?
(1) synthesis (2) decomposition (3) single replacement (4) double replacement
9. Which of the following metals is most active?
(1) Ag
(2) Zn
(3) Sn
(4) Li
10. Based on Reference Table J, which metal will react spontaneously with Al +3?
(1) Co
(2) Cr
(3) Cu
(4) Ca
11. Which reaction occurs spontaneously?
(1) Cl2 (g) + 2 NaBr (aq)  Br2 () + 2 NaCl (aq)
(2) Cl2 (g) + 2 NaF (aq)  F2 (g) + 2 NaCl (aq)
(3) I2 (s) + 2 NaBr (aq)  Br2 () + 2 NaI (aq)
(4) I2 (s) + 2 NaF (aq)  F2 (g) + 2 NaI (aq)
12. According to Table F, which ions combine with chloride ions to form an insoluble
compound?
(1) Fe+2 ions
(2) Ca+2 ions
(3) Li+ ions
(4) Ag+ ions
13. Which compound when stirred in water will not pass through filter paper?
(1) NaCl
(2) NH4S
(3) Mg(OH)2
(4) LiCl
14. Based on Reference Table F, which salt is the most soluble?
(1) AgI
(2) AgBr
(3) ZnCO3
(4) K2SO4
15. Which of the following compounds is least soluble in water?
(1) copper (II) chloride
(2) aluminum acetate
(3) iron (III) hydroxide
(4) potassium sulfate
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