CBSE Class XI Chemistry Sample Paper
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Questions and Answers

In which range are the critical temperatures of carbon dioxide and methane?

  • 31.1°C to 81.9°C
  • 31.1°C to -81.9°C (correct)
  • -31.1°C to -81.9°C
  • -31.1°C to 81.9°C

    • What is the maximum marks for CBSE Class – XI CHEMISTRY exam?

  • 90
  • 80
  • 70 (correct)
  • 60

    • Why is lithium (Li) expected to have a larger number of atoms than sodium (Na) when both are taken in 1.0g each?

  • Lithium has a higher atomic number than sodium.
  • Lithium atoms are smaller in size than sodium atoms. (correct)
  • Lithium has more isotopes than sodium.
  • Lithium has a smaller atomic mass than sodium.

    • Why is a metal higher than another metal in the electrochemical series considered a weaker reducing agent?

    <p>The metal has a higher reduction potential.</p> Signup and view all the answers

    What is the main reason for the stronger intermolecular forces in carbon dioxide compared to methane?

    <p>Carbon dioxide is polar, while methane is nonpolar.</p> Signup and view all the answers

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