Here's the classification of the given chemical reactions based on the information provided:
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Al + GaP → Ga + AlP
- Type: Single displacement (or single replacement) reaction. In this reaction, aluminum displaces gallium in gallium phosphide (GaP).
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2 Mg + O2 → 2 MgO
- Type: Combustion reaction. This is a reaction of magnesium with oxygen to form magnesium oxide, which is characteristic of combustion reactions.
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MgO + BeSe → BeO + MgSe
- Type: Double displacement (or double replacement) reaction. In this reaction, magnesium oxide and beryllium selenide exchange constituents to form beryllium oxide and magnesium selenide.
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CH4 + 2O2 → CO2 + 2H2O
- Type: Combustion reaction. In this reaction, methane (CH4) combusts in the presence of oxygen (O2) to produce carbon dioxide (CO2) and water (H2O).
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2 NaCl → Na + Cl2
- Type: Decomposition reaction. This reaction involves the decomposition of sodium chloride into sodium (Na) and chlorine gas (Cl2).
In summary:
- Single displacement
- Combustion
- Double displacement
- Combustion
- Decomposition