Multiple Choice Questions

Which of the following pair of compound name formula is correct I Calcium oxide Ca2O II Aluminu...........

General Studies (CPO) General Science

Which of the following pair of compound name - formula is correct?

I. Calcium oxide - Ca_²O

II. Aluminum Oxide - Al₂O₃

This questions was previously asked in

SSC CPO 9th Nov 2022 Shift 3

Only I

Both I and II

Neither I nor II

Only II

- I. Calcium oxide - CaO

* The correct formula for calcium oxide is CaO.

* Calcium has a charge of +2, and oxygen has a charge of -2, which combines in a 1:1 ratio to form CaO.

- II. Aluminum Oxide - Al₂O₃

* The formula given for aluminum oxide is correct as Al₂O₃.

* Aluminum has a charge of +3, and oxygen has a charge of -2, which combine in a 2:3 ratio to form Al₂O₃.

- Option 1: Only I - Incorrect. Calcium oxide is CaO.

- Option 2: Both I and II - Incorrect, as I is incorrect.

- Option 3: Neither I nor II - Incorrect, as II is correct.

- Option 4: Only II - Correct. Only the second statement is correct.

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