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Topic 5: Chemical formulas and Chemical Equations

19. Types of chemical reactions: Determining type of reaction from equation

1. Given the equation: SO2 (g) + O2 (g) ------------ > SO3 (g)
What type of reaction is shown above?

1) Synthesis 3) Single replacement
4) Double replacement
2) Decomposition

2. Given the equation: Mg (s) + 2HCl (aq) <-------- > MgCl2 (aq) + H2 (g)

What type of equation is shown above?
1) Synthesis 3) Combustion
2) Double replacement
4) Single replacement

3. Given the equation: KCl + NaNO3 ---------- > KNO3 + NaCl
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What type of reaction is represented by the equation 3) Single replacement

1) Combustion

2) Synthesis 4) Double replacement

4. Given the equation : C3H8 + 3O2 --------------- > 3CO2 + 4H2

This reaction represents 3) Single replacement

1) Combustion
2) Synthesis 4) Double replacement

5. The reaction: N2 (g) + H2(g) ------------- > NH3 (g) is best described as

1) Synthesis

3) Single replacement
2) Decomposition 4) Double replacement

6. Given the chemical equation : KClO3(s) ------------- > KCl (s) + O2(g) .

What type of reaction is represented by the above equation?

3) Synthesis
1) Combustion
2) Decomposition 4) Neutralization

7. Which equation represents a double replacement reaction?
1) 2Na + 2H2O ------------ > 2NaOH + H2
2) CaCO3 --------------------- > CaO + CO2
3) LiOH + HCl --------------- > LiCl + H2O
4) CH4 + 2O2 -------------- > CO2 + 2 H2O

8. Which chemical equation is showing a combustion reaction?
1) H2 (g) + I2 (g) --------------- > 2 HI (g)
2) 2Zn (s) + 2HNO3(aq) ------ > Zn(NO3)2 + H2
3) NaCl (aq) + KI (aq) ------------ > NaI (aq) + KCl (aq)
4) 2C2H6(g)
+ 7O2(g) ------------ > 4CO2 (g) + 6H2O (g)

9. A single replacement reaction is shown in which equation?
1) Ca(OH)2 + HCl ------------- > CaCl2 + H2O
2) Ca + 2H2O ----------- > H2 + Ca(OH)2
3) 2H2O2
---------------------- > 2H2O + O2
4) 2 H2 + O2 --------------- > 2 H2O

10. Which of the following equations is showing a decomposition reaction?
1) (NH4)2CO3 ------------------------ > 2NH3 + CO2 + H2O
2) 4NH3 + 5O2 ------------ > 4NO + 6H2O
3) NH3 + H2O ------------- > NH4OH
4) N2 + 3H2 ------------ > 2NH3

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