Tag: method of separation

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Questions Related to method of separation

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

Which technique could be used to obtain the elements X and Y from the compound $XY$?

  1. Filtration

  2. Distillation

  3. Electrolysis

  4. Crystallisation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To separate elements X and Y from the compound XY we have to break it into ions,

and the process of breaking compound into its ions are known as electrolysis.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation


There is a mixture of X, Y and Z. If the mixture of X and Y can be separated by magnetic separation and the mixture of Y and Z can be separated by distillation.
The different states of X, Y and Z are respectively -

  1. Solid, solid, liquid.

  2. Solid, liquid, solid.

  3. All are liquids.

  4. All are solids.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Since X, Y can be separated by magnetic separation so X, Y are solids. 

Y, Z can be separated by distillation method therefore, Y, Z must be solid liquid mixture. 
Already we know Y is a solid hence, Z is a liquid.

Hence, option (A) is the correct answer.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

In a mixture of X and Y, X can be separated from Y by magnetic separation.

Which of the following pairs will form X and Y?

  1. Sand, sawdust.

  2. Iron, sulphur.

  3. Iodine, sand.

  4. Gun powder and sawdust.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

X, Y are two solids making a mixture. 

One is component is magnetic, whereas, other is non-magnetic. 
Hence, the mixture must be of iron and sulphur.

Therefore, option (B) will be the correct answer.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

Napthalene and iron filings can be separated by the method of

  1. Solvent extraction

  2. Sublimation

  3. Magnetic separation

  4. Filtration
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Napthalene can be dissolved in a solvent like benzene and filtered from iron filings. On evaporating the solution napthalene can be obtained back. This method is solvent extraction.
Iron filings can be attracted towards magnet and separated from napthalene. Therefore, method can be used magnetic separation.
Napthalene has the property of sublimation hence on heating napthalene sublimes and gets separated from iron filings by the method of sublimation.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because

  1. all the domains get oriented in the direction of magnetic field

  2. all the domains get oriented in the direction opposite to the direction of magnetic field

  3. domains get oriented randomly

  4. domains are not affected by magnetic field
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ferromagnetic materials contain magnetic domains. When placed in an external magnetic field, these domains align with the field, resulting in a net magnetic moment and permanent magnetization.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

There are several criteria for purity of organic compounds. Out of these which one is considered best?

  1. Melting point

  2. Microscopic examination

  3. Mixed melting point

  4. Colour
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mixed melting point is considered to be the best criteria for purity of a substance. The purified sample is mixed with a small quantity of pure compound and melting point of mixture is determined. If melting point of mixture is same as that of the pure compound, the sample compound is pure, otherwise it requires further purification.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

Solvent extraction is a method for separating a substance from a solution or mixture by using a solvent in which it is more soluble. 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Solvent extraction is a method used for separating a substance from one or more by using a solvent.

In most cases, the substance to be extracted, which may be a solid, a liquid or a gas, is dissolved in a liquid, along with other substances, and a liquid solvent is used for the extraction this is sometimes called liquid-liquid extraction. 

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

Name a technique used to separate :
Iron and sulphur

  1. filtration

  2. distillation

  3. magnetic

  4. chromatography
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electrical and Magnetic separation: Electrolytes and non electrolytes, magnetic and non magnetic substances can be separated by this technique of separation using either electrical field or magnetic field.
Magnet can be used to separate iron from sulphur.