Second most abundant element in alloy misch metal is:

Ce

The correct answer is option 2. Ce.

Mischmetal is an alloy composed primarily of cerium (Ce), along with small amounts of other rare earth elements such as lanthanum, neodymium, and praseodymium. It is used in various applications, including the production of lighter flints, pyrophoric alloys for cigarette lighters, and as a component in certain types of steel.

In mischmetal, cerium is the most abundant element, making up the majority of the alloy composition. Due to its abundance and favorable properties, such as high reactivity and ability to form stable compounds, cerium plays a central role in the overall characteristics and performance of mischmetal.

Given that cerium is the predominant element in mischmetal, it logically follows that it would also be the second most abundant element in the alloy, after itself. Therefore, option 2.Ce, is the correct answer.