This question was previously asked in

MP Sub Engg Official Civil Paper Held on 4 Sep 2018 - Shift 2

Option 1 : +3

SSC JE ME Full Test 4

5872

200 Questions
200 Marks
120 Mins

The correct answer is __ +3__.

__Key Points__

- The formula for the aluminum cation is
**Al**^{3+}. - The formula for the phosphate anion is
**PO**^{4−}. - So the formula unit for aluminum phosphate represents a 1:1 ratio.
- The formula unit for aluminum phosphate is
**AlPO**._{4}