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(a) (i), (ii) and (iii),
(b) (i), (ii) and (iv)
(c) (ii), (iii) and (iv)
(d) (i), (iii) and (iv)

[ A+D ] (1mark)

Q.6. Which of the tubes in(a) and (b) will be more effective as a condenser in the
distillation apparatus and why?[ A+Av ] (3mark)

Q.7 .While diluting a solution of salt in water, a student by mistake added acetone
(boiling point 56°C). What technique can be employed to get back the acetone? Justify
your choice. [ A+Av ] (3mark)

Q.8 .A child wanted to separate the mixture of dyes constituting a sample of ink. He
marked a line by the ink on the filter paper and placed the filter paper in a glass
containing water as shown in Fig.2.3. The filter paper was removed when the water
moved near the top of the filter paper.
(i) What would you expect to see, if the ink contains three different coloured
components?

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