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Q.

A simple fractional tube is packed with _____________.

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a

Wooden beads

b

Plastic beads

c

Metal beads

d

Glass beads

answer is D.

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Detailed Solution

  • The fractionating column with glass beads is fitted in the neck of the distillation flask containing the mixture of liquids to be separated. 
  • The glass beads present in the fractionating column provide a large surface area for hot vapours to cool and condense repeatedly.
  • Glass is used because it is chemically very stable. It reacts with very few substances and thus, the composition of the mixture remains intact.
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