Question

Which of the following substances would be the softest?

CuO

SiC

C25H52

Zn

Answer 1

I think the correct answer is the last option. Zinc is the softest substance among the choices given. Pure zinc is a soft metal. It is when alloyed it will became hard. Its hardness as a pure metal is only 2.5 using the Mohs scale.

Answer 2

The paraffin is the softest.

Step-by-step explanation:

The others materials, they have a bigger value of hardness in Mohs scale, like the CuO with a value of 3.5, the SiC with a value of 9, and Zinc with a value of 2.5.