InterviewSolution
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InterviewSolution
| 1. |
A certain element is a metalloid that forms an acidic oxide with the formula R_(2)O_(5). Identify the element. |
| Answer» Solution :Since the ELEMENT forms an oxide with formula, `R_(2)O_(5)`, it must be an element of group 15. Now group 15 has two metalloids, As and Sb. Since the ACIDIC character of pentoxides of group 15 ELEMENTS decreases while the basic character increases down the group, therefore, `As_(2)O_(5)` is acidic while `Sb_(2)O_(5)` is amphoteric. Thus, the methalloid of group 15 elements which forms and acidic pentoxide `(As_(2)O_(5))` is As. | |