Question

When atoms join together to form chemical bonds without transferring any electrons but rather, by sharing them, they are said to be united by a covalent bond. Which of the following does not have a chemical bond that is covalent?

• A. Copper sulphide
• B. Oxygen
• C. Acetylene
• D. Wax from petroleum

Answer 1

The correct option is A Copper sulphide

The bond present in Copper Sulphide($CuS$) is ionic.

i.e. $C{u}^{2+}+S^{2-}\to CuS$

But in Oxygen, Acetylene & wax from petroleum, the bonds present are covalent i.e. electrons are shared among atoms rather than being transferred.