NAVAKHOLO JOINT EVALUATION TEST 233/1 CHEMISTRY PAPER 1-(THEORY)

NAVAKHOLO JOINT EVALUATION TEST
Kenya Certificate of Secondary Education
233/1
CHEMISTRY PAPER 1-(THEORY)
Instructions to candidates
(a) Answer ALL the questions
(b) ALL working MUST be clearly shown
(c) Non-programmable silent electronic calculators and KNEC mathematical tables may be used
1. Describe the safest way one can light a Bunsen burner in the laboratory.
(2 marks)
2. a) Describe how one can prepare natural indicator from leaves of plants.
(2 marks)
b) Explain why this indicator is not suitable in determining the strengths of acidic or basic solutions .
(1 mark)
3. a) Describe how one can prepare 2M sodium hydroxide using a 1 litre volumetric flask.
(2 marks)
b) Explain how one can deliver 2M sodium hydroxide solution into a burette.
(1 mark)
4. a) Describe how one can prepare dilute sulphuric acid from concentrated sulphuric acid using a beaker
(11/2 marks)
b) Describe how one can find the pH of the 2M sulphuric acid solution.
(11/2 marks)
5. The pH values of A, B, and C are as shown in the table.
Solution
A
B
C
pH values
9.7
2.1
5.3
Name of