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SSC CPO 2024 PYQ — Question 92

SSC CPO - 28 June 2024 - Shift 3 • General Awareness • Q92

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One mole of Aluminium Sulphate Al2(SO4)3 contains:

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Correct answer: C

Explanation

The correct answer is option 3 i.e. 12 moles of oxygen atoms.

  1. One mole of Aluminium Sulphate (Al₂(SO₄)₃) contains 12 moles of oxygen atoms.
  2. This is because each sulfate ion (SO₄²⁻) contains 4 oxygen atoms, and there are 3 sulfate ions in one formula unit of Al₂(SO₄)₃.
  3. Therefore, 3 sulfate ions × 4 oxygen atoms = 12 oxygen atoms.
  4. Since 1 mole of Al₂(SO₄)₃ contains 3 moles of sulfate ions, the total number of oxygen atoms in 1 mole of Aluminium Sulphate is 12 moles.