Question

Which among the following is not a homogeneous mixture?

• A. solder
• B. aqueous solution of $\mathrm{NaCl}$
• C. sulfur in carbon disulfide
• D. sulfur in water

Answer 1

The correct option is D

sulfur in water

Explanation for the correct answer

(D) Sulfur is insoluble in water. So, it forms a heterogeneous mixture.

Explanation for Incorrect answer

(A)Solder is an alloy of tin $\left(\mathrm{Sn}\right)$ and lead $\left(\mathrm{Pb}\right)$. It is a homogeneous mixture of metals.

(B) Aqueous $\mathrm{NaCl}$ will dissolve in water and make a homogenous solution.

(C) When sulfur dissolves in carbon disulfide $\left({\mathrm{CS}}_2\right)$, sulfur has the property to dissolve in $\left({\mathrm{CS}}_2\right)$ and forms a homogeneous mixture.

Hence, sulfur in water is not a homogeneous mixture.