Question

solve it............
Question 1. Write a chemical equation when magnesium metal reacts with aqueoushydrochloric acid to produce a solution of magnesium chloride and hydrogen gas.
Question 2. Can a combination reaction be redox reaction.
Question 3. Why do we apply paint on iron articles?
Question 4. What are the different types of reactions?
Question 5. What is a decomposition recfion? Give example.

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Answer 1

Answer:

Q1. Mg + hcl =mgcl2

Q2. no

Q3. to protect iron against corrosion

Q4. 1 combination reaction

2. decomposition

3 redox

4 double decomposition

Answer 2

Answer:

Explanation:

ANSWER:

1. Mg+HCl(aq.) ------------------------> MgCl +H(gas)
2. Yes , a combination reaction can be redox. We know  that addition of oxygen is also Oxidation reaction. During formation of Carbon Dioxide, Redox takes place.   C + O2-------------->CO2
3. We apply paint to Iron articles to prevent corrosion. As Iron reacts with Oxygen and moisture , it forms Rust which eats up the Iron.
4. The different types of reaction are:-

• Combination Reaction
• Decomposition Reaction
• Displacement Reaction
• Double Displacement Reaction
• Redox Reaction

    5. Decomposition reaction is in which we can get many constituents from  a single substance. For Example

2AgBr-----------------------> 2Ag + Br2