Question

name the element which is a yellow solid at room temperature shows catenation and allotropy

Answer 1

This element is sulfur. Sulfur has three allotropes and many such stable and unstable forms mainly because of the property of catenation.

The three allotropes of sulfur are orthorhombic, monoclinic, and amorphous. The orthorhombic form is the stable form which is yellow colored at room temperature.