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ix chem 26-08 wednesday

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

Some examples of solids which sublime are________________

a)

naphthalene and anthracene.

b)

ammonium chloride

c)

camphor.

d)

all of these

2.

This _________________method is used for the separation of components of a mixture containing two miscible liquids that boil without decomposition and have sufficient difference in their boiling points

a)

distillation.

b)

fractional distillation.

3.

To separate a mixture of two or more miscible liquids for which the difference in boiling points is less than 25 K, ______________________________

a)

distillation

b)

fractional distillation

4.

The apparatus is similar to that for simple _________________, except that a fractionating column is fitted in between the distillation flask and the condenser.

a)

complex distillation,

b)

simple distillation,

5.

A _________________ column is a tube packed with glass beads.

a)

complex fractionating

b)

simple fractionating

6.

Air is a _____________________ and can be separated into its components by fractional distillation.

a)

heterogeneous mixture

b)

homogeneous mixture

7.

Formula of Ammonium Chloride is_______________

a)

AlCl3

b)

NH4Cl

c)

NH3Cl

d)

Al

8.

Formula of copper is____________

a)

Cu

b)

co

c)

cl2

d)

cl3

9.

Formula of ammonia is?

a)

NH3

b)

NH4

c)

NH2

d)

NH5

10.

The Formula of sulphuric acid______________

a)

H2SO4

b)

HCL

c)

H2O

d)

All of these