In which of the following reactions conc. H₂SO₄ is used as an oxidising reagent? 

(i) CaF₂ + H₂SO₄ →CaSO₄ +  2HF 

(ii) 2HI  + H₂SO4 → I₂ +  SO₂ +  2H₂O

(iii) Cu  +  2H₂SO₄ →CuSO₄ +  SO₂ + 2H₂O 

(iv) NaCl  + H₂SO₄ → NaHSO₄ +  HCl

This is a multiple choice answer as classified in NCERT Exemplar

Correct option is (ii) and (iii)

Here fig (b) contains one S-S bond.

The oxidising behaviour of H₂SO₄ is represented by (ii) and (iii) among the aforementioned four. It oxidises HI in reaction (ii) and then reduces to SO₂.

The oxidation state of sulphur's core atom drops from +6 to +4. It oxidises copper in (iii) and is reduced to SO₂.

 

<div><div><p><span data-teams="true">This is a multiple choice answer as classified in NCERT Exemplar</span></p><p>Correct option is (ii) and (iii)</p><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1745991926phpGUYWzD_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1745991926phpGUYWzD.jpeg" alt="" width="266" height="116"></picture></div><div><p>Here fig (b) contains one S-S bond.</p><p>The oxidising behaviour of&nbsp;H₂SO_4&nbsp;is represented by (ii) and (iii) among the aforementioned four. It oxidises&nbsp;HI&nbsp;in reaction (ii) and then reduces to&nbsp;SO₂.</p><p>The oxidation state of sulphur's core atom drops from +6 to +4. It oxidises copper in (iii) and is reduced to&nbsp;SO₂.</p></div></div><p>&nbsp;</p></div></div>

0 Upvotes 0 Upvotes 0 Downvotes

• • Report Abuse
• Comment