Question

Which of the following group $13$ elements is non-reactive in crystallic form?

• A. Aluminum
• B. Galliurn
• C. Boron
• D. Thallum

Answer 1

The correct option is C Boron

Solution:- (C) Boron

Crystalline boron is very pure form and normally the pure form is unreactive. The crystalline boron is very hard solid. It has a quasi crystalline form. Because of all these boron is unreactive in air in its crystalline form.