SL-F4-Chemistry-2009-exam-pdf - Webs
SL-F4-Chemistry-2009-exam-pdf - Webs
SL-F4-Chemistry-2009-exam-pdf - Webs
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Somaliland National Examination Certificate of Secondary Education<br />
and Certification Board <strong>Chemistry</strong>, <strong>2009</strong><br />
Question 4 (10 marks)<br />
a) Define Boyle’s law (2 marks)<br />
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b) A certain gas occupies 5 dm 3 at 24 0 C and 15 cm Hg. Calculate the pressure of the gas<br />
if the volume is halved and the temperature is raised to 200 o C. (4 marks)<br />
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c) A crystal of potassium manganate (VII) was carefully dropped into a beaker<br />
containing water, as shown below.<br />
11<br />
© <strong>SL</strong>NECB, <strong>2009</strong>
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