Check sibling questions
Class 6
Chapter 5 Class 6 - Separation of Substances

Question 1  

Which of the following methods can be used to separate copper sulfate solution from copper sulfate and water?

  1. Decantation
  2. Distillation
  3. Crystallization 
  4. Filtration

 

Answer:  

It can be separated easily from an impure sample by the process of crystallization . So the correct option is  C.

 

Question 2

Tincture of iodine is a weak solution of iodine in alcohol. Iodine can be recovered from tincture of iodine by the process of

  1. Evaporation
  2. Distillation
  3. Filtration
  4. Decantation

 

Answer:

Tincture of iodine is a weak solution of iodine in alcohol. Iodine can be recovered from tincture of iodine by the process of Distillation. So the correct option is  B.

 

Question 3 

At water treatment plants which supply drinking water, the river water is filtered by using

  1. Cloth filter
  2. Porcelain filters
  3. Filter papers
  4. Sand filters

 

Answer:

The river filtered water is using a sand filter for the supply of drinking water from the river.So, the correct option is  B.

 

Question 4

In cashew nut factories, cashew nuts of different sizes are separated by the process of

  1. Winnowing
  2. Sieving
  3. Hand-picking
  4. Loading

 

Answer:

Sieving is the process used in the separation of cashew nuts of different sizes in industries.So, the correct option is  B.

 

Question 5  

Which of the following mixtures cannot be separated by using water as solvent followed by filtration and evaporation?

  1. Blue vitriol and sand
  2. Salt and chalk powder
  3. Sand and sugar
  4. Sand and sulfur

 

Answer:

Mixture of sand and sulfur cannot be separated by using water as a solvent because both are insoluble in water. In sand and sulfur both are insoluble in water so none of them settle down or soluble . So, the correct option is  D.

 

Question 6

A mixture of teal leaves and iron filings can be separated from each other by

  1. Hand-picking
  2. Filtration
  3. Magnet
  4. Sieve

 

Answer:

A mixture of tea leaves and iron filings can be separated by using magnet.  So the correct option is  C.

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CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Economics, Accounting and English at Teachoo