Answer to Question #58328 in Physical Chemistry for Akah Julius

Question

Which group of elements in the periodic table exhibits semiconductor behaviour?

If 30 g of a substance occupies a volume of 25 cm3, calculate its density on S.I units.

13 Fractional distillation cannot be used to _

14 Distillation can be used to separate ________

15 What is the appropriate S.I. unit for distance?

16 Convert 10 kg to mg.
17 In filtration, the term ‘filtrate’ refers to _____________.
the solid that remains on the filter paper
the liquid that drains through the filter paper.
the type of filter paper used.
the mixture before separation

18 Which one of the following can be separated by adding water, stirring and filtering?

19 In fractional distillation, a mixture of liquids is separated based on their ___________.
boiling points
solubility
density
chemical composition

20 Distillation can be used to separate __________.
a soluble solid from a solution
a liquid from a solution
a solid from a solid
an insoluble solid from a solution