Separation
Trending Questions
42. What is the difference between sublimation and deposition?
Why do we need separate mixtures ?Give examples to illustrate your answer
Why do we need to separate different components of a mixture? Give two examples.
- Filtration
- Separating funnel
- Chromatography
- Distillation
- Decantation
- Sedimentation
- Churning
- Evaporation
Which separation techniques will you apply for the separation of different pigments from an extract of flower petals?
- Chlorination
- Bacterial disinfection
- Sublimation
- Pasteurization
- Sand paper
- Chromatography paper
- Filter paper
- Bar magnet
Which method is used to separate a mixture of common salt and naphthalene powder?
Mention the principle of hand picking method.
Clay is separated from water by the method called___________
Magnets have many applications in our daily lives. Which of the following is an example of using a magnet to separate a mixture?
Magnetic door latch on a refrigerator
Magnet in hard disks
Magnets in junkyards
Magnet in a compass
Iodine dissolve in alcohol to form a/an
aqueous solution .
non-aqueous solution .
definite solution.
suspension.
How will you separate iron nails from saw dust?
Which of the following gases can be used as a preservative?
- Oxygen
- Carbon dioxide
- Nitrogen
- Water vapour
- Evaporation.
- Churning.
- Filtration.
- Sedimentation.
Write the principle of separation techniques.
a) Winnowing.
b) Sedimentation and decantation.
c) Loading
d) Crystallisation
e) Magnetic separation.
- Sedimentation
- Evaporation
- Filtration
- Decantation
The process of adding chemical substance to help the suspended solid particles settles down faster is known as
sedimentation
decantation
filtration
loading
The salt water can be purified by:
Filtering it through a cloth.
Stirring it for half an hour.
Heating it and thus condensing steam which will give fresh water.
Salt water cannot be purified.
Question 15
Match the mixtures in Column I with their method of separation in Column II.
- Pure substance
- Mixture
- Element
- Compound
Name the method used for the separation of the mixture of common salt from seawater.
Question 12
Fill in the blanks with appropriate words:
(i) Small pieces of stone can be removed from rice by ___.
(ii) ___ are obtained from stalks by threshing.
(iii) Husk from wheat flour is generally removed by ___.
(iv) The process of settling of heavier particles is called ___.
(v) Filtration is helpful in separating an insoluble ___ from a ___.
Question 19
You are provided with a mixture of salt, sand, oil and water. Write the steps involved for the separation of salt, sand and oil from the mixture by giving an activity along with the diagram.
Which separation technique will you apply for the separation of salt from seawater?
Salt and sugar are
Insoluble substances
Soluble substances
miscible liquids
Immiscible liquids
Why do we separate substances present in a mixture?
i) To separate wanted components from unwanted components.
ii) To remove impurities.
Only (i) is correct
Both are incorrect.
Only (ii) is correct.
Both are correct.
What separation techniques will you apply for the separation of the following:
The different pigments from an extract of the flower petals.
Separation is done to separate two useful components.
True/False
True
False
