During distillation, a liquid is first heated to form vapour and then, these vapours are collected and condensed to form liquid again. Distillation is used for identification as well as purification of organic compounds.
Two liquids can be separated using simple distillation if the temperature difference between their boiling points is more than or equal to

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$D e a r S t u d e n t T w o l i q u i d s c a n b e s e p a r a t e d u \sin g s i m p l e d i s t i l l a t i o n i f t h e t e m p e r a t u r e d i f f e r e n c e b e t w e e n t h e i r b o i l i n g p o i n t s i s m o r e t h a n o r e q u a l t o 25 ° C . I f t h i s d i f f e r e n c e i s s m a l l e r t h a n 25 ° C, t h e n f r a c t i o n a l d i s t i l l a t i o n t e c h n i q u e i s u s e d t o s e p a r a t e t h e t w o l i q u i d s . R e g a r d s$

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(A) Simple distillation	(i) To separate the liquids which are steam volatile, insoluble in water and contains non-volatile impurities.
(B) Fractional distillation	(ii) To separate liquids which decompose at a temperature below their normal boiling points
(C) Vacuum distillation	(iii) To separate two or more liquids which have boiling points close to each other.
(D) Steam distillation	(iv) To separate liquid from non-volatile impurities.

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