Question

during which of the following changes,a new substance formed
(a) melting
(b) sublimation
(c) evaporation
(d) rusting​

Answer 1

Explanation:

Rusting is the correct answer.

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Answer 2

Answer:-

• Rusting

Explanation:-

• (a) melting: The process in which a solid is converted in liquid at atmospheric pressure. No new substance is formed.
• (b) Sublimation:- the process in which a solid is directly converted into gas and vice versa. No new substance.
• (c) Evaporation:- The process of conversion of a liquid into gas even below its boiling point.
• (d) Rusting:- The process of changing a metal into its undesirable compound. Which is not reversible and hence a new substance rust is formed in this reaction.