| Two substances, A and B were made to react to form a third substance, \[{{\mathbf{A}}_{\mathbf{2}}}\mathbf{B}\] according to the following reaction \[\mathbf{2A+B}\to {{\mathbf{A}}_{\mathbf{2}}}\mathbf{B}\] |
| Which of the following statements concerning this reaction are incorrect? (NCERT Exemplar) |
| I. The product \[{{\mathbf{A}}_{\mathbf{2}}}\mathbf{B}\] 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) II, III and IV
Correct Answer: C
Solution :
[c] \[{{\operatorname{A}}_{2}}B\] is a compound made up of two elements A and B in a fixed ratio. The properties of a compound (e.g. \[{{\operatorname{A}}_{2}}B\]) are entirely different from those of its constituent elements (e.g. A and B). The composition of a compound is fixed.
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