An alloy which contains a lanthanoid metal and is used to produce bullets and shell is.........
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Mischmetall
An alloy is a blend of metals (sometimes with small amounts of non-metals) made to obtain useful properties. The best known alloy of the lanthanoids is mischmetall: about 95% lanthanoid metal and 5% iron, used in Mg-based alloys to make bullets, shells and lighter flint. None of the other three alloys contains a lanthanoid.
NCERT (2026-27 edition):
General Characteristics – “… The best single use of the lanthanoids is for the production of alloy steels for plates and pipes. A well known alloy is mischmetall which consists of a lanthanoid metal (~ 95%) and iron (~ 5%) and traces of S, C, Ca and Al. A good deal of mischmetall is used in Mg-based alloy to produce bullets, shell and lighter flint. …”
Note: The same/similar question has been asked in different years by NTA as per the details given below:
| 2026 | 2025 | 2024 | 2023 | 2022 |
|---|---|---|---|---|
| 31-05 S2 25-05 S1 21-05 S2 | – | – | – | – |