Question

1. Reaction of 'magnesium' with air is :
(1) Exothermic reaction
(2) Endothermic reaction
(3) Reversible reaction
(4) Substitution reaction​

Answer 1

Answer:

(1)

Explanation:

When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide, which is a compound. A compound is a material in which atoms of different elements are bonded to one another. Oxygen and magnesium come together in a chemical reaction to form this compound.

Answer 2

Reaction of 'magnesium' with air is Exothermic reaction

Explanation:

• Option (1) Exothermic reaction is correct answer.
• Energy is emitted into the environment when mg and oxide atoms meet to form new bonds, making flaming magnesium an exothermic reaction.
• It grows heated because of a combustion process in which magnesium oxide reacts with oxygen to form MgO, or magnesium oxide.
• When this reaction takes place, energy is released, which warms the Mg metal.
• Option (2) Endothermic reaction is incorrect answer.
• Endothermic reactions are those that involve total heat absorption.
• Example: Melting ice cubes.
• Option (3) Reversible reaction is incorrect answer.
• The reaction of hydrogen gas with iodine vapour to produce hydrogen iodide is a reversible process.
• The following is a list of forward and reverse responses.
• Hydrogen and iodine combine to generate hydrogen iodide in the forward process.
• Option (4) Substitution reaction​ is incorrect answer.
• A single displacement reaction, single replacement reaction, or single substitution reaction is another name for a substitution reaction.
• When chlorine gas (Cl2) is irradiated, it splits into two chlorine radicals (Cl•), which have extremely nucleophilic free electrons.