How do i identify the Class 12 Chemistry Chapter 4 important questions?

<p>Students need to practice the Class 12 Chemistry previous year question to identify the important questions. Some of important questions are<strong> </strong>reactions of <math ><semantics><mrow><msub><mi>K</mi><mn>2</mn></msub><mi>C</mi><msub><mi>r</mi><mn>2</mn></msub><msub><mi>O</mi><mn>7</mn></msub></mrow>&lt;annotation encoding="application/x-tex"&gt;K_2Cr_2O_7</annotation></semantics></math><span aria-hidden="true">K2? Cr2? O7? </span> and <math ><semantics><mrow><mi>K</mi><mi>M</mi><mi>n</mi><msub><mi>O</mi><mn>4</mn></msub></mrow>&lt;annotation encoding="application/x-tex"&gt;KMnO_4</annotation></semantics></math><span aria-hidden="true">KMnO4? </span> in acidic, basic, and neutral medium, lanthanide contraction and its consequences, balancing redox reactions, etc.</p>

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