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Physical and Chemical Changes

Two substance...

Question

Two substances, A and B were made to react to form a third substance, $A_{2} B$ , according to the following reaction:
2A + B → $A_{2} B$
Which of the following statements concerning this reaction is/are correct?
i) Substance $A_{2} B$ shows the properties of substances A and B.
ii) Formation of $A_{2} B$ is a chemical change.
iii) $A_{2} B$ will always have a fixed composition.
iv) Substances A and B are classified as compounds.

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Solution

The correct answer is option (a).

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$2 A + B \to A_{2} B$

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Which of the following statements concerning this reaction are correct?
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ii) Formation of

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A_{2} B

according to the following reaction

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shows the properties of substances A and B.
(ii) The product will always have a fixed composition.
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