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Form Two,Chemistry C.A.T.2 Question Paper

Form Two,Chemistry C.A.T.2

Course:Secondary Level

Exam Year:2012

1.Lead sulphate cannot be prepared by reaction of sulphuric acid on lead oxide.Explain.(2 mks)
2.Starting with copper(¡¡)oxide describe how asample of copper(¡¡¡)sulphate crystals can be prepared in the laboratory (3 mks)
3.The information in the table below relates to elements in same group of the periodic table.Study it and answer the questions that follow.
ELEMENTS ATOMIC SIZE
G1 0.19
G2 0.23
G3 0.15
Which element has the lowest ionization energy?Give areason (2 mks)
4.Using dots (.) and crosses (x) to represent electron draw diagrams to represent bonding in:-
a)H2O (2 mks)
b)NH4+(2 mks)
5.The melting point of phosphorous (¡¡¡) chloride is -91°C while that of magnesium chloride is 715°C.In terms of structure explain the differance in their melting points (3 mks)
6.Write ionic equations for the following reactions:-
¡) Barium nitrate + Magnesium sulphate (2 mks)
¡¡) Sodium chloride + Lead nitrate.(2 mks)
¡¡¡) Sodium hydroxide + Dilute Hydrochloric acid (2 mmmks)
¡v) Potassium carbonate + Zinc sulphate
7.Calcium chloride conducts electricity in molten state but not in solid state.Explain (2 mks)
8.Explain why graphite conducts electricity and diamond does not (3 mks)
9.State and explain observations made when magnesium sulphate solutions added lead nitrate solution.(3 mks)
10.When preparing salts why are filrates not heated to dryness (2 mks)

Form Two,Chemistry C.A.T.2 Question Paper

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