Identify the correct statements in the context of paramagnetic substances.
(A) In external magnetic field B, individual atomic dipole moment points in opposite direction of B.
(B) Susceptibility is small and positive.
(C) In non-uniform magnetic field, the paramagnetic bar will tend to move from weak field to strong.
(D) Examples of paramagnetic substances are Aluminium, Sodium and oxygen.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (B), (C) and (D) only
$\text{(A)}:\ \text{Paramagnetic dipoles align along } B \Rightarrow \text{False}$
$\text{(B)}:\ \chi \text{ is small and positive} \Rightarrow \text{True}$
$\text{(C)}:\ \text{Move from weak to strong field} \Rightarrow \text{True}$
$\text{(D)}:\ \text{Al, Na, O}_2 \text{ are paramagnetic} \Rightarrow \text{True}$
The correct statements are (B), (C), and (D).