JEE Main · 2022 · Shift-ImediumBOND-161

Given below are two statements: Statement I: O2, Cu2+ and Fe3+ are weakly attracted by magnetic field and are…

Chemical Bonding · Class 11 · JEE Main Previous Year Question

Question

Given below are two statements:

Statement I: O2\mathrm{O_2}, Cu2+\mathrm{Cu^{2+}} and Fe3+\mathrm{Fe^{3+}} are weakly attracted by magnetic field and are magnetized in the same direction as the magnetic field.

Statement II: NaCl and H2O\mathrm{H_2O} are weakly magnetized in opposite direction to the magnetic field.

Choose the most appropriate answer:

Options
  1. a

    Both Statement I and Statement II are correct

    ✓
  2. b

    Both Statement I and Statement II are incorrect

  3. c

    Statement I is correct but Statement II is incorrect

  4. d

    Statement I is incorrect but Statement II is correct

Correct Answera

Both Statement I and Statement II are correct

Detailed Solution

🧠 Distinguish between paramagnetic (weakly attracted, magnetized in same direction as field) and diamagnetic (weakly repelled, magnetized opposite to field) substances.

🗺️ Evaluate Statement I — O2\mathrm{O_2}, Cu2+\mathrm{Cu^{2+}}, Fe3+\mathrm{Fe^{3+}} are paramagnetic:

  • O2\mathrm{O_2}: 2 unpaired electrons (in degenerate π2p∗\pi^*_{2p}) → paramagnetic → attracted by field, magnetized in same direction ✓
  • Cu2+\mathrm{Cu^{2+}}: 3d93d^9, 1 unpaired electron → paramagnetic ✓
  • Fe3+\mathrm{Fe^{3+}}: 3d53d^5, 5 unpaired electrons → paramagnetic ✓

Statement I is TRUE ✓

Evaluate Statement II — NaCl and H2O\mathrm{H_2O} are weakly magnetized in opposite direction to the field:

  • NaCl: all electrons paired → diamagnetic → weakly repelled and magnetized opposite to applied field ✓
  • H2O\mathrm{H_2O}: all electrons paired → diamagnetic → same behaviour ✓

Statement II is TRUE ✓

Answer: Both Statement I and Statement II are correct\boxed{\text{Answer: Both Statement I and Statement II are correct}}

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Given below are two statements: Statement I: O2, Cu2+ and Fe3+ are weakly attracted by magnetic… (JEE Main 2022) | Canvas Classes