Separation of Substances

Separation of substances Worksheet-10

Multiple-Choice Question:

21. Which process is used to separate pieces of chaff from the grain?

(A) Threshing      (B) Winnowing    (C) Sieving

22. _______ is lighter than the ________.

(A) Chaff, grain    (B) Grain, chaff    (C) Grain, seed

23. In winnowing process, the __________ falls vertically.

(A) Chaff              (B) Grain              (C) Fodder

Separation of substances Worksheet-11

Multiple-Choice Question:

1. By which process can we separate the insoluble solids suspended in a liquid?

(A) Sedimentation                           (B) Decantation

(C) Filtration

2. By which process, we can separate a mixture of sand and water?

(A) Absorption    (B) Filtration        (C) Decantation

Separation of substances Worksheet-12

Multiple-Choice Question:

11. What is true about the process of filtration?

(A) The particles of the insoluble solid must be smaller than the holes in the filtering device.

(B) The particles of the insoluble solid must be bigger than the holes in the filtering device.

(C) The particles of the insoluble solid must be very small than the holes in the filtering device.

12. Which of the following acts as a filtering device in the process of filtration?

(A) Filter paper   (B) Filter plate     (C) Filter bowl