Question

The metal that belongs to Rare Earth Element category is

• A. Cerium
• B. Lithium
• C. Titanium
• D. Cobalt

Hint:

Cerium is one of the most abundant rare earth elements, commonly used in catalytic converters and electronics.

Answer 1

The Correct Option is A

Step 1: Define Rare Earth Elements (REEs). 
REEs include 15 lanthanides plus scandium and yttrium. Cerium is part of the lanthanide series. 
Step 2: Evaluate the options. 
Cerium (Ce) is a well-known REE. 
Lithium, Titanium, and Cobalt are transition or alkali metals but not classified as REEs.