Which of the following is a paramagnetic material at STP?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Calcium
A paramagnetic substance has atoms with a permanent magnetic moment. It is weakly attracted by a magnet and has a small positive susceptibility.
Option (1) Calcium — Correct. Calcium is a standard example of a paramagnetic material, along with aluminium, sodium and platinum.
NCERT (2026-27):
Paramagnetism – “… Some paramagnetic materials are aluminium, sodium, calcium, oxygen (at STP) and copper chloride.”