Question

Assertion (A) $O _{2}, Cu ^{2+}, Fe ^{3+}$ are paramagnetic substances.
Reason (R) They have one or more unpaired electrons which are attracted by magnetic field.

• A. Both $A$ and $R$ are correct; $R$ is the correct explanation of $A$.
• B. Both $A$ and $R$ are correct; $R$ is not the correct explanation of $A$.
• C. $A$ is correct; $R$ is incorrect.
• D. $R$ is correct; $A$ is incorrect.

Answer 1

Answer: (A)

$O _{2}, Cu ^{2+}, Fe ^{3+}$ are paramagnetic substances due to the presence of one or more unpaired electrons which are attached by magnetic field.