Question

Which of the following formulas for a compound containing the Fe3* ion is incorrect?1. Fe2(SO3)32. Fe(NO2)23. Fe(NO3)34. FePO35. Fe2(SO4)3

Answer 1

Answer:

$2:\text{ Fe\lparen NO}_2)\placeholder{⬚}_2$

Explanation:

Here, we want to get the incorrect formula for the Fe3+ ion

Now, this has to do with the ion of the counter-party

There has to be a proper exchange of charge

Now, let us look at the options:

In option 2, it is expected that the counter-party takes 3 as its subscript

Instead, it is taking 2, which corresponds to iron (ii)

In that case, we have the option as the correct choice of answer