In our daily lives, we consume sugar, water, table salt, milk, and other products. In many cases, the beneficial components must be separated from the undesirable or even potentially hazardous components in any ratio. A variety of gases, for example, can be found in the air we breathe. To produce a pure sample, substance separation is performed to remove non-useful or hazardous components or remove contaminants and extract valuable components.
Download Class 6 Chemistry Worksheet on Chapter 5 Separation of Substances – Set 3 PDF
CBSE Class 6 Chemistry Chapter 5 Separation of Substances – Set 3
Q-1: Which of the following processes uses evaporation?
a) Making of paneer from milk
b) Separation of salt from seawater
c) Formation of dew on leaves of grass
d) Foggy windows of the car
Q-2: Which of the following is the method used to separate potatoes from tomatoes?
a) Handpicking
b) Sieving
c) Winnowing
d) Filtration
Q-3: Which of the following is a device used to separate a liquid from a solid?
a) Centrifuge
b) Strainer
c) Chromatogram
d) Funnel
Q-4: Where does decantation come into play? Give two specific examples.
Q-5: What happens when steam comes into contact with an ice-cooled metal plate?
Q-6: State the methods that can be used for separating the following mixtures:
a) Soil, urad and husk
b) Rice, gram, iron fillings
Q-7: Fill in the blanks:
a) Peanuts are separated from a wheat and peanut mixture by ____________.
b) Components’ properties are retained in a ____________.
c) Sieving is used when components of a mixture have ________ sizes.
d) The separated husk is used as _________ for cattle.
e) Oil and water from their mixture can be separated by __________.
Q-8: What effect does temperature have on a saturated solution?
Q-9: Can we separate the flour from the powdered chalk by sieving?
Q-10: What causes increased visibility after rain?
Q-11: Explain the process of filtration.
Q-12: Name and briefly describe a method that can be useful in separating sand from powdered dry leaves. What is the underlying principle of this method?
Q-13: What makes water a universal solvent?
Q-14: What is the purpose of adding the alum to the muddy water in the loading process?
Q-15: Bring a packet of food grain from the store to the home. Spread the grains out on a piece of paper. Is there only one type of grain on the sheet of paper? Is there any stone, husk, broken grain, or other grain particles in it?
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