Subject :NSO Class : Class 9
Which of the following statements about the given experimental set-up is/are incorrect?
I. It is used to separate a mixture of two or more miscible liquids for which the difference in boiling points is more than 25 K.
II. It is used for the separation of different gases from air.
III. It is used to separate acetone and water from their mixture.
IV. It is based on the principle of repeated cooling and condensation of vapours by providing surface for the vapours.
A I only
B III and IV only
C I and II only
D I and III only
Ans 1:
Class : Class 9
Fractional distillation is used to separate liquids with less than 25 K difference in boiling points.
Ans 2:
Class : Class 9
3 and 1 only
Ans 3:
Class : Class 9
yes it 1 and 3 only