Chemistry · Chemical Bonding
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In aluminum oxide, ions are present in the ratio 2:3, its formula is ____.
- A
AlO
- B
Al2O
- C
Al2O3
- D
Al3O2
Al2O3is the only formula that satisfies both; the stated ratio of 2:3 and the valencies of elements involved (Oxygen: -2, Aluminium: +3).
a) AlO: This is not the correct formula for aluminum oxide. In this formula, there is only one aluminum ion (Al3+) and one oxygen ion (O2-), but aluminum oxide has a different ratio of ions.
b) Al2O: This is also not the correct formula for aluminum oxide. It suggests that there are two aluminum ions and one oxygen ion, which is not the correct ratio.
c) Al2O3: This is the correct formula for aluminum oxide. It indicates that there are two aluminum ions (Al3+) and three oxygen ions (O2-) in each unit of the compound. The correct ratio of ions in aluminum oxide is 2:3.
d) Al3O2: This is not the correct formula for aluminum oxide. It suggests that there are three aluminum ions and two oxygen ions, which is not the correct ratio.
Tagged under Chemistry · Chemical Bonding · 2021