Question 7

Question

Match the following equations to the type of reaction.

Column A
1.
Synthesis:
Synthesis
2.
Single replacement:
Single replacement
3.
Combustion:
Combustion
4.
Double displacement:
Double displacement
5.
Decomposition:
Decomposition
Column B
a.
2 H2O → 2 H2 + O2

b.
Na + Cl → NaCl

c.
C3H8 + 5 O2 → 3 CO2 + 4 H2O

d.
MgBr2 + 2 NaCl → MgCl2 + 2 NaBr

e.
2 NaCl + Br2 → 2 NaBr2 + Cl2

Answer 1

To match the equations in Column A to the corresponding types of reactions in Column B, here are the correct pairings:

1. Synthesis: b. Na + Cl → NaCl

   • This represents a synthesis reaction where two elements combine to form a compound.

2. Single replacement: e. 2 NaCl + Br2 → 2 NaBr + Cl2

   • This is a single replacement reaction where one element replaces another in a compound.

3. Combustion: c. C3H8 + 5 O2 → 3 CO2 + 4 H2O

   • This is a combustion reaction, where a hydrocarbon reacts with oxygen to produce carbon dioxide and water.

4. Double displacement: d. MgBr2 + 2 NaCl → MgCl2 + 2 NaBr

   • This is a double displacement reaction, where the anions and cations of two different compounds exchange places.

5. Decomposition: a. 2 H2O → 2 H2 + O2

   • This is a decomposition reaction, where a compound breaks down into its component elements.

So the final matches are: 1 - b
2 - e
3 - c
4 - d
5 - a