What types of chemical reactions are the following?

Question

Column A
Al + + GaP → Ga + AlP
2 Mg + O2 → 2 MgO
MgO + BeSe → BeO + MgSe
CH4 + 2O2 → CO2 + 2H2O
2 NaCl → Na + Cl2

Column B
A) Synthesis
B) Decomposition
C) Combustion
D) Double Replacement
E) Single Replacement

Answer 1

Let's analyze the reactions in Column A and determine their types according to the descriptions in Column B.

1. Al + GaP → Ga + AlP

   • This is a Single Replacement reaction because aluminum (Al) is replacing gallium (Ga) in gallium phosphide (GaP).
   • Answer: E) Single Replacement

2. 2 Mg + O2 → 2 MgO

   • This is a Synthesis reaction, as magnesium (Mg) and oxygen (O2) combine to form magnesium oxide (MgO).
   • Answer: A) Synthesis

3. MgO + BeSe → BeO + MgSe

   • This is a Double Replacement reaction. The metal oxide (MgO) and metal selenide (BeSe) exchange their components to form new compounds (BeO and MgSe).
   • Answer: D) Double Replacement

4. CH4 + 2O2 → CO2 + 2H2O

   • This is a Combustion reaction because methane (CH4) is reacting with oxygen (O2) and producing carbon dioxide (CO2) and water (H2O).
   • Answer: C) Combustion

5. 2 NaCl → Na + Cl2

   • This is a Decomposition reaction, as sodium chloride (NaCl) is breaking down into its elemental components, sodium (Na) and chlorine (Cl2).
   • Answer: B) Decomposition

In summary:

1. E) Single Replacement
2. A) Synthesis
3. D) Double Replacement
4. C) Combustion
5. B) Decomposition