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Q.

A mixture contains three different substances X, Y and Z. They are of the same size, cubical in shape and yellow in colour. X particles are very heavy, insoluble, non-magnetic and contribute 50% of the mixture. Y particles are very light, insoluble, non-magnetic and contribute 40% of the mixture. And Z particles are iron pieces. Which of the following methods can separate X, Y and Z?

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a

Sieving, Magnetic separation, Filtration 

b

Handpicking, Sublimation, Sieving  

c

Winnowing, Magnetic separation 

d

Magnetic separation, Winnowing

answer is A.

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Detailed Solution

Very light particles Y can be separated by winnowing, while ‘Z’ being magnetic in nature,  can be separated by magnetic separation leaving behind ‘X’.

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