Identify the diamagnetic substance
A. Bismuth
B. Aluminium
C. Platinum
D. Copper
E. Diamond
Choose the correct answer from the options given below :
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A, D and E only
A diamagnetic substance is weakly magnetised opposite to the applied field (small negative susceptibility); a paramagnetic substance is weakly magnetised along the field (small positive susceptibility).
A. Bismuth — Diamagnetic. It is the classic example, with one of the largest negative susceptibilities.
B. Aluminium — Not diamagnetic. It is paramagnetic.
C. Platinum — Not diamagnetic. It is paramagnetic.
D. Copper — Diamagnetic. Its susceptibility is small and negative.
E. Diamond — Diamagnetic. Its susceptibility is small and negative.
The diamagnetic substances are A, D and E.
NCERT (2026-27):
Diamagnetism – “… Some diamagnetic materials are bismuth, copper, lead, silicon, nitrogen (at STP), water and sodium chloride.”
Paramagnetism – “… Some paramagnetic materials are aluminium, sodium, calcium, oxygen (at STP) and copper chloride.”