A hydrocarbon with formula C8H18 gives one monochloro derivative. The hydrocarbon is:

In the following reaction<math class="wrs_chemistry" xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>Cr</mi><mn>2</mn></msub><msubsup><mi mathvariant="normal">O</mi><mn>7</mn><mo>-</mo></msubsup><mo>&nbsp;</mo><mo>+</mo><mo>&nbsp;</mo><mn>14</mn><msup><mi mathvariant="normal">H</mi><mo>+</mo></msup><mo>&nbsp;</mo><mo>+</mo><mo>&nbsp;</mo><mn>6</mn><msup><mi mathvariant="normal">I</mi><mo>-</mo></msup><mo>&nbsp;</mo><mo>→</mo><mo>&nbsp;</mo><mn>2</mn><msup><mi>Cr</mi><mrow><mn>3</mn><mo>+</mo></mrow></msup><mo>&nbsp;</mo><mo>+</mo><mo>&nbsp;</mo><mn>3</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi><mo>&nbsp;</mo><mo>+</mo><mo>&nbsp;</mo><mn>3</mn><msub><mi mathvariant="normal">I</mi><mn>2</mn></msub></math>Which element is reduced ?

Equation&nbsp;<math class="wrs_chemistry" xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">S</mi><mo>&nbsp;</mo><mo>+</mo><mo>&nbsp;</mo><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub><mo>→</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mi mathvariant="normal">S</mi><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>+</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mn>2</mn><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi></math>&nbsp; represents

In &nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi mathvariant="normal">C</mi><mo>&nbsp;</mo><mo>+</mo><mo>&nbsp;</mo><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>→</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mi>CO</mi><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>+</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mo>,</mo><mo>&nbsp;</mo><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><mi mathvariant="normal">O</mi></math>&nbsp; acts as

1 mole of permanganate ion in acidic medium gains 5 mole electrons to produce&nbsp;

Match column I(reaction) with column II(type of redox reaction)<figure class="table" style="width:px;"><table><tbody><tr><td>&nbsp;</td><td>column I</td><td>&nbsp;</td><td>Column II</td></tr><tr><td>A</td><td>F2 + H2O<math class="wrs_chemistry" xmlns="http://www.w3.org/1998/Math/MathML"><mo>→</mo></math>HF + O2</td><td>I</td><td>decomposition non redox reaction</td></tr><tr><td>B</td><td>PCl3+Cl2<math class="wrs_chemistry" xmlns="http://www.w3.org/1998/Math/MathML"><mo>→</mo></math>PCl5</td><td>II</td><td>disproportionation reaction</td></tr><tr><td>C</td><td>2NaHCO3<math class="wrs_chemistry" xmlns="http://www.w3.org/1998/Math/MathML"><mo>→</mo></math>Na2CO3+H2O+CO2</td><td>III</td><td>combination redox reaction</td></tr><tr><td>D</td><td>4HNO3<math class="wrs_chemistry" xmlns="http://www.w3.org/1998/Math/MathML"><mover><mo>→</mo><mi>heat</mi></mover></math>2H2O+4NO2+O2</td><td>IV</td><td>displacement of nonmetal other than hydrogen by another non metal</td></tr><tr><td>&nbsp;</td><td>&nbsp;</td><td>V</td><td>decomposition &nbsp;redox reaction</td></tr></tbody></table></figure>

A hydrocarbon with formula C₈H₁₈ gives one monochloro derivative. The hydrocarbon is:

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