Question

Gunpowder is a __________

• A. solid-liquid homogeneous mixture
• B. solid-liquid heterogeneous mixture
• C. solid-solid homogeneous mixture
• D. solid-solid heterogeneous mixture

Answer 1

The correct option is B

solid-liquid heterogeneous mixture

Correct option explanation

Solid-Liquid heterogenous mixture- Heterogenous mixtures include different states of matter (multi-phases substances) are known as solid-liquid heterogeneous mixtures. For example- Soil in the water.

1. Gunpowder is a mixture of solid and gaseous products along with a small amount of water.
2. Gunpowder is a heterogeneous mixture of ${\mathrm{KNO}}_3$(Potassium nitrate), $\mathrm{C}$ (Charcoal) and $\mathrm{S}$ (Sulphur).
3. It has a composition of $15\%$charcoal,$10\%$ sulfur and $75\%$(potassium nitrate).
4. These substances can be segregated by suitable physical method and the composition is not uniform throughout.

Incorrect option explanation

Solid-liquid homogeneous mixture- The mixture that has same proportions of its components and the uniform composition throughout. For example- Air.

Solid-Solid homogeneous mixture- These mixture contains same phase no matter where we sample them. For example- Alloys of metals is the example of solid-solid homogeneous mixture.

Solid-Solid heterogeneous mixture- These mixtures can be explained as those mixtures that is not uniform in composition. For example- sand and sugar.

Hence, gunpowder is a solid-liquid heterogeneous mixture.