Get premium membership and access revision papers, questions with answers as well as video lessons.

F2 Chemistry Question Paper

F2 Chemistry

Course:Secondary Level

Exam Year:2012

AQUINAS HIGH SCHOOL
END– TERM EXAM III 2012
F2 CHEMISTRY
NAME:……………………………………………………….…………..ADM NO:………….….CLASS:………
Q1. Name the type of chemical bond formed in each of the following compounds. (3mks)
a) Carbon (II) oxide………………………………………………………………………..…………………………….
b.i) Within water molecules………………………………………………………………………………………….
ii) Between water molecules……………………………………………………..……………………………….
Q2. The set – up below is on electrolysis of molten lead (II) iodide.

a.i) Label the cathode on the diagram. (1mk)
ii) State the observation made at the cathode
…………………………………………………………………………………………………………
….…………………………………………………………………………………………………………………………..
b) Write an ionic equation for the reaction that takes place at the anode. (1mk)
………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………
Q3. Explain why potassium is kept under paraffin while phosphorous is kept under water. (2mks)
…………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………
Q4. The diagram below is used to show that air contains carbon (IV) oxide

a) Name liquid P. (1mk)
………………………………………………………………………………………………………………………………………………
b) State the observation made on liquid ‘P’ which indicates the presence of carbon (IV) oxide. (1mk)
………………………………………………………………………………………………………………………………………………
c) Write an equation for the reaction between ‘p’ and carbon (IV) oxide. (1mk)
………………………………………………………………………………………………………………………………………………
Q5. An oxide of F has the formula F2 O5
a) Determine the oxidation state of ‘F’. ………………………………………………… (1mk)
b) In which group of the periodic table is element “F”. ………………………….. (1mk)
Q6. When extinguishing fire caused by petrol, carbon (IV) oxide is used in preference to water. Explain. (2mks)
……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
Q7. Name and explain the physical process(s) involved when the following substances are used as cooling agents
i) Ice……………………………………………………………………………………………………..…………………(2mks)
ii) Dry (solid carbon (IV) oxide) ………………………………………………………..…………………………
Q8.a) Study the information in the table below and answer the questions that follows. The letters do not represent actual symbols.
Elements Atomic No. Ionization energy kjmol-1
R 4 894
S 12 620
T 20 562
i) To which group do the above elements belong. (1mk)
…………………………………………………………………………………………………………………………………………………
ii) Write the formula for the hydrogen carbonate of S. (1mk)
………………………………………………………………………………………………………………………………………………
iii) Explain why the ionization energy of R is greater than that of T. (1mk)
…………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………
iv) When carbonate of element T was reacted with dilute sulphuric acid the resultant solution forms a white precipitate. Explain this observation. (1mk)
………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………
b) A form two student was investigating the melting point, boiling point and other properties of oxides of period three elements.
Explain the following observations;
i) Why sulphur (IV) oxide is a gas at room temperature? (1mk)
…………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………
ii) Why the melting point of MgO is higher than that of Na2O.
…………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………

F2 Chemistry Question Paper

More Question Papers

Popular Exams

Mid Term Exams

End Term 1 Exams

End Term 3 Exams

Opener Exams

Full Set Exams