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  • Two substances, A and B were made to react to form a third substance, A2B according to the following reaction: 2A + B → A2B Which of the following statements concerning this reaction are incorrect?

Two substances, A and B were made to react to form a third substance, A_{2}B  according to the following reaction:2A + B \rightarrow A_{2}B. Which of the following statements concerning this reaction are incorrect?

(i) The product A2B shows the properties of substances A and B.

(ii) The product will always have a fixed composition.

(iii) The product so formed cannot be classified as a compound.

(iv) The product so formed is an element.

(a) (i), (ii) and (iii)

(b) (ii), (iii) and (iv)

(c) (i), (iii) and (iv)

(d) (iii) and (iv)

 

Answers (1)

Answer: C

Solution: 2A + B \rightarrow A_{2}B, A and B will combine to make a product A_{2}B . The product A_{2}B is called compound and it will not have any property of elements A and B. The composition of elements in product will be fixed: If N moles of element A is present that means N/2 moles of element B will be present. This product will be pure. Hence statement (i), (iii) and (iv) are wrong statements.

Therefore the correct option of this question is option C.

 

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