Q.

Which of the following can give an oxyacid when dissolved in H2O?

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a

SO2

b

All

c

SO3

d

Cl2O

answer is D.

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Detailed Solution

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When Cl2O, SO3, and SO2 are dissolved in water, they can react to form oxyacids.

Cl2O reacts with water to form chloric(I) acid (HClO):

Cl2O + H2O → 2HClO

SO3reacts with water to form sulfuric acid (H2SO4):

SO3+ H2O→ H2SO4

SO2 reacts with water to form sulfurous acid (H2SO3):

SO2 + H2O → H2SO3

Therefore, the oxyacids formed in each case are:

  • Chloric(I) acid (HClO) from Cl2O
  • Sulfuric acid (H2SO4) from SO3
  • Sulfurous acid (H2SO3) from SO2
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