Chemistry - DISTRICTS SAMPLED AND COMPILED 1 NDHIWA 2 SOTIK...

DISTRICTS SAMPLED AND COMPILED
1. NDHIWA
2. SOTIK
3. KAKAMEGA CENTRAL
4. NYAMIRA
5. HOMABAY
6. RACHUONYO
7. MIGORI
8. UGENYA/UGUNJA
9. KISUMU WEST
10. MATUNGU
11. BUTERE
12. KAKAMEGA EAST
13. NYATIKE
14. KHWISERO
15. TRANS NZOIA WEST
16. TRANSMARA
17. KAKAMEGA NORTH
18. MUMIAS
TOPICS COVERED Questions Answers
1 Introduction to chemistry 3 164
2 Simple classification of substances 5 165
3 Acids, bases and indicators 11 168
4 Air and combustion 14 169
5 Water and hydrogen. 19 172
6 Structure of the atom and the periodic table 22 174
7 Chemical families 28 179
8 Structure and bonding 29 179
9 Slats 34 184
10 Effect of an electric current on substance 37 187
11 Carbon and its compounds 41 188
12 Gas laws 45 191
13 The mole 47 196

14 Organic chemistry 1 51 202
15 Nitrogen and its compounds 60 208
16 Sulphur an dits compounds 69 213
17 Chlorine and its compounds 74 217
18 Acids, bases and salts 77 219
19 Energy changes in chemeical and physical reactions 83 224
20 Electrochemistry 96 234
21 Metals 109 244
22 Organic chemistry II (alkanoic acids an dalakanols) 116 248
23 Radioactivity 123 254
24 Praticals 126 255

Introduction to chemistry
1. Wooden splints F and G were placed in different zones of a Bunsen burner flame.
The diagram below gives the observations that were made
(a) Explain the difference between F and G
(b) Name the type of flame that was used in the above experiment
2. The diagrams below represent a list of apparatus which are commonly used in a chemistry
laboratory:-
(a) Give the correct order of the apparatus, using the letters only , to show the correct arrangement
that can be used to prepare and investigate the nature of PH of a sample of onion solution
(b) Name one chemical substance and apparatus that is needed in this experiment
3. (a) When the air-hole is fully opened, the bunsen burner produces a non-luminous flame.
Explain
(b) Draw a labelled diagram of anon-luminous flame
4. (a) What is a drug?
(b) Give two drugs that are commonly abused by the youth.
5. The diagram below shows three methods for collecting gases in the laboratory
(a) Name the methods A and B
A B C D E
G
F
Burnt parts
Burnt part

(b) From the methods above, identify one that is suitable for collecting sulphur (IV) oxide.
Explain
6. A mixture of hexane and water was shaken and left to separate as shown in the diagram below:
State the identity of;
(i) P ………………………………..…….. (ii) W ………………………………….….
7. The diagrams below are some common laboratory apparatus. Name each apparatus and
state its use
Diagram Name Use
(½mk ) (½mk)
(½mk) (½mk)
8. The diagram below shows some parts of a Bunsen burner
Explain how the parts labelled T and U are suited to their functions
T
U
P
W

9. The diagram below shows the appearance of two pieces of paper placed in different parts of a
non-luminous flame of a Bunsen burner and removed quickly before they caught fire.