Class 6th Ch 5 Separation of substances Written work
Exercise Questions 1. Why do we need to separate different components of a mixture? Give two examples. Solution: When two or more substances are mixed together they form a mixture. Components of a mixture should be separated because some components may not be useful or may spoil the useful component of the mixture. Examples: Tea leaves are separated from the liquid with a strainer, while preparing tea Removal of stone pieces from wheat, rice or pulses by hand 2. What is winnowing? Where is it used? Solution: The method of separating the components from a mixture is known as winnowing. In this method, heavier and lighter components of a mixture are separated by wind or by blowing air. This method is used by farmers to separate lighter husk particles from heavier seeds of grain. 3. How will you separate husk or dirt particles from a given sample of pulses before cooking? Solution: Husk and dirt particles are separated from pulses by winnowing. 4. What is sieving? Where is it used? Sol