Question

Pure solid can be obtained from its impure sample by the process of:

• A. sedimentation
• B. crystallisation
• C. filtration
• D. decantation

Answer 1

The correct option is B crystallisation

Pure solids can be obtained from their impure sample by crystallisation.
Crystallisation is used to purify solids.
All the other processes mentioned in the options i.e. sedimentation, filtration and decantation are done to free a liquid from solid contaminants and thus obtain its decontaminated form.