Sample Question on Combination Reaction
Question 1: Because potassium is an extremely reactive alkali metal, it needs to be kept submerged in oil to keep from interacting with the air. Write the balanced chemical equation for the potassium-oxygen combination process.
Answer:
The chemical equation according to the question:
K(s)+O2(g)→K2O(s)
Balanced chemical equation will be:
4K(s)+O2(g)→2K2O(s)
Question 2: Write combination reaction for the formation of aluminum oxide (Al2O3).
Answer:
Chemical balance equation for formation of aluminum oxide (Al2O3) is given as follows:
4Al + 3O2 → 2Al2O3
Question 3: When Ag is exposed to air it gets a black coating of?
Answer:
A black layer of silver sulfide is created when silver is exposed to air and reacts with the hydrogen sulfide gas in the atmosphere. In every solvent, silver sulfide remains insoluble.
Combination Reaction
Combination Reaction is a type of chemical reaction that occurs when two or more substances combine to form a new substance without any separate byproducts, due to that, it is also called an Addition Reaction or Synthesis Reaction. Combination Reaction involves the synthesis of a single compound from its constituent elements or other compounds.
This article covers the concepts related to combination reaction, like the formula of combination reaction, types of combination reaction, synthesis, cause, examples and real-life examples of combination reaction.
Table of Content
- What is a Combination Reaction?
- Cause of Combination Reaction
- Example of Combination Reactions
- Properties of Combination Reaction
- Types of Combination Reactions
- Real-Life Examples of Combination Reaction