1-32-1. Which of the following is a decomposition reaction?
A. 2 CO(g) + O2(g) → 2 CO2(g)
B. Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g)
C. Ba(OH)2(aq) + H2SO4(aq) → 2 H2O(l) + BaSO4(s)
D. 2 H2O2(aq) → 2 H2O(l) + O2(g)
1-32-2. What is the salt produced by the neutralization reaction of magnesium hydroxide, Mg(OH)2, and hydrochloric acid, HCl?
A. MgCl, B. MgCl2, C. HOH, D. none of these
1-32-3. Which of the following is a correct chemical equation for a combination reaction between a metallic element and nonmetallic element?
A. Mg(s) + N2(g) → MgN2(s),
B. Mg(s) + O2(g) → MgO2(s)
C. Mg(s) + N(g) → MgN
D. None of these
1-32-4. Which of the following chemical reactions is not a redox reaction?
A. C(s) + O2(g) → CO2(g)
B. Cl2(g) + 2 KBr(aq) → 2 KCl(aq) + Br2(l)
C. 2 KClO2(s) → 2 KCl(s) + 3 O2(g)
D. NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
1-32-5. Which of the following chemical reactions is a redox reaction?
A. NH3(g) + HCl (g) → NH4Cl(s)
B. CaCO3(s) → CaO(s) + CO2(g)
C. 2 CaO(s) → 2 Ca(s) + O2(g)
D. Ag+(aq) + Cl-(aq) → AgCl(s)
