Two substances, and were made to react to form a third substance, according to the following reaction:
Which of the following statements concerning this reaction are incorrect?
(i) The product shows the properties of substances and
(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
(i), (iii) and (iv)
Pure substances:
The explanation for correct options:
The product shows the properties of substances and :
The properties of a compound (e.g., ) are entirely different from those of its constituent elements (i.e., and ).
The product so formed cannot be classified as a compound:
is a compound made up of two elements and in a fixed ratio.
2A + B → A2B
The product so formed is an element:
The product formed i.e. is a compound.
Since all the above statements are not true about the product formed thus option (c) is correct.
The explanation for incorrect options:
The product will always have a fixed composition:
Since the above statement is true about the compound thus option (a), (b) and (d) are incorrect.
Hence option (c) is the correct option.