EASY
Earn 100

Which of the following has properties similar to filter paper?

50% studentsanswered this correctly

Important Questions on Separation of Substances

EASY
Distilled water is _____ of the electricity.
EASY

Squeeze some drops of lime into a glass of milk. You will see a whitish solid forming after some time. Place a thin cloth over a bowl and pour the liquid on it. The white solid is left behind on the cloth and liquid collects in the bowl.

_____ is the name of the process represented by pouring the liquid through a cloth. (distillation/filtration/chromatography)

Question Image

HARD
Reverse osmosis is a method of removing dissolved solids from liquids without boiling. Reverse osmosis is done with the help of a special semi-permeable membrane. The property of such a membrane is such that when we try to pass salty water through it, it allows water to pass but not the salt. Thus, if we pass tap water through such a membrane, only pure water will pass through it. Reverse osmosis process is being used to provide drinking water in areas where subsoil water is brackish in nature, i.e., where the salt content in underground water is so high that it becomes unfit for drinking purpose. Can you get pure water through this if you use seawater?
EASY
Two miscible liquids can be separated by the process of decantation.
HARD
Differentiate between threshing and winnowing?
HARD

Why can sugar not be separated from water by evaporation? 

(Hint: Sugar will get charred if the solution is heated excessively). 

MEDIUM

Fill in the blank space by choosing correct words from the list given below . 
List : evaporation, churning, threshing, sieving, sedimentation, winnowing, condensation, hand-picking. 

Corn is separated from husk by the process of _____.

MEDIUM
During loading this chemical substance is added to improve sedimentation.
MEDIUM

Squeeze some drops of lime into a glass of milk. You will see a whitish solid forming after some time. Place a thin cloth over a bowl and pour the liquid on it. The white solid is left behind on the cloth and liquid collects in the bowl.

_____ is the process represented by adding lime to milk.

Question Image

MEDIUM
Which method is used for cleaning pulses and rice?
EASY

Name the following:
The process of pouring out the liquid without disturbing the sediments.

EASY
Which method will you used to separate tea leaves from tea? Decantation or filtration?
MEDIUM
A pure solid is obtained from its solution by
EASY

Squeeze some drops of lime into a glass of milk. You will see a whitish solid forming after some time. Place a thin cloth over a bowl and pour the liquid on it. The white solid is left behind on the cloth and liquid collects in the bowl. What is the correct name for the liquid that collects in the bowl?

HARD

Match the statements in the column A with those in column B.

Column A Column B
1.    The process of removing insoluble particles of suspension by passing it through filter paper.

(a) Sieving

2.    The process of obtaining soluble salt from its solution. (b) Churning
3.    The process of obtaining butter from curd. (c) Loading
4.    The process of making particles of mud heavy with alum. (d) Filtration
5.    The process of separation of chaff from wheat flour. (e)Evaporation

 

EASY
The grains are separated from stalks by winnowing. 
EASY
Form a similar pair of words.
Saltwater : _____ (condensation/evaporation) :: muddy water : filtration
HARD
Describe sedimentation and decantation with the help of diagrams.
EASY
What is the fluid that passes through the filter paper known as? (Sediment / Filtrate)