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SSC CGL 2023 PYQ — Question 26

SSC CGL - 19 July 2023 - Shift 3 • General Awareness • Q26

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What is the percentage composition of the element of H2SO3?

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Correct answer: D

Explanation

The correct answer is option 4 i.e. 2.5% H, 39% S, 58.5% O

 

  • The percentage composition of the element of H2SO3  is  2.5% H, 39% S, 58.5% O.

  • H2SO3 => (2 x Atomic mass of hydrogen) + Atomic mass of sulfur + (3 x Atomic mass of oxygen) => (2 x 1) + 32 + (3 x 16) => 2 + 32 + 48 => 82 g/mol

Calculate the percentage composition:

  • Hydrogen: (2 / 82) x 100% = 2.44% approximately equals 2.5%
  • Sulfur: (32 / 82) x 100% = 39.02% approximately equals 39%
  • Oxygen: (48 / 82) x 100% = 58.53% approximately equals 58.5%