Sign In

JEE Advance - Chemistry (2002 - No. 4)

Identify the correct order of acidic strengths of CO2, CuO, CaO, H2O
CaO < CuO < H2O < CO2
H2O < CuO < CaO < CO2
CaO < H2O < CuO < CO2
H2O < CO2 < CaO < CuO

Explanation

Here's the correct answer and explanation:

Option A: CaO < CuO < H2O < CO2 Understanding Acid-Base Trends:
  • Oxides of Metals:

  • Metal oxides are generally basic in nature.

  • Basicity increases with increasing metallic character. Calcium (Ca) is a more reactive metal than copper (Cu), making CaO more basic.

  • Oxides of Non-Metals:

  • Non-metal oxides are generally acidic.

  • Acidity increases with increasing electronegativity of the central non-metal atom. Carbon is more electronegative than hydrogen, so CO2 is more acidic than H2O.
Putting it together:
  • Most Basic: CaO (Calcium Oxide)

  • Less Basic: CuO (Copper Oxide)

  • Neutral: H2O (Water)

  • Most Acidic: CO2 (Carbon Dioxide)

Comments (0)

Advertisement