6th Grade > Chemistry
SEPARATION OF SUBSTANCES MCQs
Total Questions : 98
| Page 3 of 10 pages
Answer: Option C. -> Sieving
:
C
Sand is inpowdered form. So by using a sieve of proper pore size, the mixture of dry leaves can be separated from sand by the process ofsieving. Here, the sand particles would pass through the sieve leaving the leaves on top of it.
:
C
Sand is inpowdered form. So by using a sieve of proper pore size, the mixture of dry leaves can be separated from sand by the process ofsieving. Here, the sand particles would pass through the sieve leaving the leaves on top of it.
Answer: Option B. -> Evaporation
:
B
Evaporation is used to separate a soluble solid from a liquid. For example, if we boil a saltwater solution, the water will evaporate and the salt will be left behind.
:
B
Evaporation is used to separate a soluble solid from a liquid. For example, if we boil a saltwater solution, the water will evaporate and the salt will be left behind.
Answer: Option A. -> True
:
A
Heating the solution increases the solubility of solute in it. In other words,on heating more amount of a substance can be dissolved inthe same solution. For example, more amount of sugar can be dissolved in hot water as compared to water at room temperature.
:
A
Heating the solution increases the solubility of solute in it. In other words,on heating more amount of a substance can be dissolved inthe same solution. For example, more amount of sugar can be dissolved in hot water as compared to water at room temperature.
Answer: Option D. -> mixture
:
D
A mixture is a physical combination of two or more substances. These are not combined chemically. The components retain their individual properties even after forming a mixture.
:
D
A mixture is a physical combination of two or more substances. These are not combined chemically. The components retain their individual properties even after forming a mixture.
Answer: Option B. -> Magnetic separation
:
B
Magnetic separation is a method in which magnetic particles are separated out from a mixture using a magnet.
Iron gets attracted to the magnet because of its magnetic nature. So, it can be easily separated from the waste material.
:
B
Magnetic separation is a method in which magnetic particles are separated out from a mixture using a magnet.
Iron gets attracted to the magnet because of its magnetic nature. So, it can be easily separated from the waste material.
Answer: Option B. -> False
:
B
In threshing, the mixture is beaten in order to separate, but this principle cannot be applied here. Driedleaves are very light inweight andcan be easily flown out by air. So,they can be easilyseparated from the sand by winnowing.
:
B
In threshing, the mixture is beaten in order to separate, but this principle cannot be applied here. Driedleaves are very light inweight andcan be easily flown out by air. So,they can be easilyseparated from the sand by winnowing.
Answer: Option D. -> Winnowing
:
D
In winnowing, the mixture is tilted slowly from some height. Thus, the heavier element slides down while the lighter element is flown out by the action of wind.
:
D
In winnowing, the mixture is tilted slowly from some height. Thus, the heavier element slides down while the lighter element is flown out by the action of wind.
Answer: Option B. -> Sieving
:
B
Fine particles are separated from the bigger particles by using a sieve. Since flour is in powdered form and husk are solid particles, so sieving is used to separate them.
:
B
Fine particles are separated from the bigger particles by using a sieve. Since flour is in powdered form and husk are solid particles, so sieving is used to separate them.
Answer: Option A. -> True
:
A
In a fixed amount of water, different amounts are dissolved for different substances. This is so because different substances are made from different atoms, ions or molecules, which interact with water in different ways.
For example, amount of salt dissolved is different from the amount of sugar dissolved in the same amount of water.
:
A
In a fixed amount of water, different amounts are dissolved for different substances. This is so because different substances are made from different atoms, ions or molecules, which interact with water in different ways.
For example, amount of salt dissolved is different from the amount of sugar dissolved in the same amount of water.
:
Process name: 1 Mark
Explanation: 2 Marks
This process is called Winnowing.
It is one of the methods used to separate heavier and lighter components of a mixture.
The mixture is exposed to blowing wind.The wind blowsaway the lighter materials,while the heavier parts fall back for recovery, hence separating the two substances of a mixture
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