The most abundant element in alloy misch metal is:

The correct answer is Option (2) → Ce

Mischmetall is an alloy made of a lanthanoid metal (~95%) and iron (~5%), with traces of S, C, Ca and Al. The lanthanoid part is mostly cerium, so cerium is the most abundant element in the alloy.

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.”