Question

question 81 (1 point)
2cs(s) + br₂(g) →2csbr(s). this reaction can be classified as:

1. synthesis
2. electron transfer
3. oxidation-reduction
4. all of the above

Explanation:

1. Synthesis Reaction: A synthesis reaction is when two or more reactants combine to form a single product. Here, \( 2\text{Cs}(s) + \text{Br}_2(g)

ightarrow 2\text{CsBr}(s) \) shows two reactants (Cs and \( \text{Br}_2 \)) combining to form one product (CsBr), so it is a synthesis reaction.

1. Electron Transfer: In this reaction, Cs (a metal) loses electrons (oxidation: \( \text{Cs}

ightarrow \text{Cs}^+ + e^- \)) and \( \text{Br}_2 \) gains electrons (reduction: \( \text{Br}_2 + 2e^-
ightarrow 2\text{Br}^- \)). Thus, there is electron transfer between the reactants.

1. Oxidation - Reduction (Redox) Reaction: A redox reaction involves both oxidation (loss of electrons) and reduction (gain of electrons). Since Cs is oxidized (oxidation state increases from 0 to +1) and \( \text{Br}_2 \) is reduced (oxidation state decreases from 0 to -1), this is a redox reaction.

Since the reaction fits all three categories (synthesis, electron transfer, and oxidation - reduction), the correct classification is "All of the above".

Answer:

1. All of the above