Separation of Substances

Separation of substances Worksheet-4

Multiple-Choice Question:

13. Winnowing is useful only when:

(A) two solids have different melting points

(B) two solids have different boiling points

(C) two solids have different magnetic properties

(D) two solids have different weights

14. The process of churning of Butter milk in a mixer grinder is:

(A) Centrifugation                           (B) Distillation

Separation of substances Worksheet-5

Fill in the blanks:

1. ________method is used when the mixture contains solids of different colours, shapes or sizes.
2. The process of conversion of vapours of a substance into its liquid state is called _______.
3. Sugar from sugar solution can be separated by _________.
4. ________ solution of sugar is used to prepare jalebi.

Multiple-Choice Question:

5. Stone pieces are separated from wheat by:

(A) hand-picking                              (B) evaporation

Separation of substances Worksheet-6

Multiple-Choice Question:

13. The process by which a solid changes directly into gas is called:

(A) decantation                               (B) sublimation

(C) condensation                             (D) sedimentation

14. The liquid that passes through the filtering agent is called:

(A) Filter paper   (B) Filtrate           (C) Residue (D) Coagulant