2 Na + Cl2 → 2 NaCl

Double Replacement
b. Single Replacement
c .Decomposition
d. Combustion
e. Synthesis

The reaction 2 Na + Cl2 → 2 NaCl is a synthesis reaction.

The given chemical reaction is:

2 Na + Cl2 → 2 NaCl

This reaction represents a type of chemical reaction called "synthesis." In a synthesis reaction, two or more substances combine to form a single compound.

Therefore, the answer is "e. Synthesis."

The given chemical equation is 2 Na + Cl2 → 2 NaCl. To determine the type of chemical reaction, we need to understand the characteristics of each type of reaction.

a) Double Replacement: This type of reaction involves the exchange of ions between two compounds, resulting in the formation of two new compounds. We don't see this kind of exchange happening in the given equation.

b) Single Replacement: In this type of reaction, one element replaces another element in a compound. However, in the provided equation, neither Na nor Cl2 replaces any other element, so single replacement is not the answer.

c) Decomposition: A decomposition reaction occurs when a compound breaks down into simpler substances. In the given equation, we see that the reactants, Na and Cl2, are combining to form the compound NaCl. Therefore, decomposition is also not the correct answer.

d) Combustion: Combustion reactions occur when a substance reacts with oxygen gas, often producing heat and light. The given equation does not involve oxygen gas, so combustion is not the answer.

e) Synthesis: Synthesis reactions involve the combination of two or more substances to form a new compound. In the given equation, the reactants Na and Cl2 combine to form the compound NaCl. Hence, the correct answer is synthesis.

In conclusion, the type of reaction shown in the equation 2 Na + Cl2 → 2 NaCl is synthesis.