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NEET2016ChemistryRedox ReactionsActual

Which of the following can be oxidised by SO ₂ ?

Options

  1. AK ₂ Cr ₂ O ₇
  2. BMg
  3. CH ₂ O
  4. DAll of these

Correct answer

B. Mg

Step-by-step solution

With K ₂ Cr ₂ O ₇, SO ₂ works as reducing agent. aligned K ₂ Cr ₂ O ₇+ H ₂ SO ₄+3 SO ₂ & K ₂ SO ₄+ & Cr ₂ ( SO ₄ )₃+ H ₂ O aligned With water the reaction is not a redox reaction, aligned & SO ₂+ H ₂ O H ₂ SO ₃ & 2 Mg + SO ₂ 2 MgO + S & 3 Mg + SO ₂ 2 MgO + MgS aligned

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