Chemistry Question Paper
Chemistry
Course:Chemistry
Institution: Form 1 question papers
Exam Year:2012
CHEMISTRY FORM ONE WEEK ONE
MONDAY 13TH AUGUST 2012
1. Briefly describe how a mixture of sodium chloride, Sulphur and Iron filings can be separated and each substance obtained in solid state.
2. Briefly describe how flower extract can be used as an indicator.
3. Use the table below to indicate the type of change:
Action Type of change
Burning of a piece of paper
Heating of hydrated copper(II) sulphate
Heating of iodine crystals
Heating of a metal in air
TUESDAY 14TH AUGUST 2012
1. Explain why Luminous flame is bright yellow in colour?
2. Distinguish between the following terms Deliquescence and Hygroscopic
3. (a) With an aid of diagram show how dry Oxygen gas can be prepared in the laboratory using Sodium peroxide and water.
(b) Write word equation show the decomposition of potassium chlorate solid.
WEDNESDAY 15TH AUGUST 2012
1. A given drink was analysed to find out the sugars present in it using chromatography. The diagram below shows the spots after the chromatogram was developed.
a) Name the sugars present in Z.
b) Which of the sugars has the lowest density? Explain
THURSDAY 16TH AUGUST 2012
1. a). Solutions may be classified as strong basic, weakly acidic, strong acidic. The information below gives solutions and their PH values. Study it and answer the questions that follow.
Solutions PH values
B 1.5
C 6
D 14
Classify the solutions in the table above using the stated classification.
b). Explain how you would distinguish between a carbonate and a sulphite using dilute acid and blue litmus paper.
FRIDAY 17TH AUGUST 2012
1. When hydrogen gas is passed over Lead (II) oxide in a combustion tube, Lead (II) oxide is reduced.
a) Write an equation for the above reaction
b) What observation was made in the combustion tube when the reaction was complete?
c) Name another gas which can be used to reduce Lead (II) Oxide.
Hope you enjoyed.Have a nice weekend
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