Chemistry GCE Ordinary Level Paper 2 June 2019 Past Questions

Chemistry GCE Ordinary Level Paper 2 June 2019 Past Questions, O-Level Chemistry paper 2 June 2019 past questions free. Cameroon GCE Chemistry papaer 2 June 2019 revision questions.

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Instructions to candidates

This paper is arranged in three, A, B, and C.

In calculations, you are advised to show all the steps in your working, giving your answer at each stage.
Calculators are allowed
You are reminded of the necessity for good English and orderly presentation in your answers.

Relative Atomic Masses
Hydrogen (H) = 1.0
Carbon (C) = 12.0
Oxygen (O) = 16.0
Copper (Cu) = 64.0
1 Faraday = 96000 coulombs.
Molar volume of a gas at r.t.p. = 24000cm³
Specific heat Capacity of water = 4.2J/g/°C
Avogadro Number = 6.02x 10²³
0°C = 273K

Chemistry GCE Ordinary Level Paper 2 June 2019 Past Questions

Time allowed: Two and a half hours

SECTION A: Answer ALL questions in this section

1. This question concerns the first four elements in group I of the periodic Table

Element	Lithium	Sodium	Potassium	Rubidium
Symbol	(Li)	(Na)	(k)	(Rb)
Atomic Number	3	11	19	37

(a) (i) Why are they classified as Group I elements? (1 mark)

    (ii) Which of the element is the least reactive? (1 mark)

   (iii) Write the electronic configuration of Potassium (K) (1 mark)

(b) (i) These elements are usually stored under paraffin. 
Explain.

    (ii) Write an equation for the reaction between sodium and water. 

(3 marks)

(c) Lithium though in Group I of the P.T resembles Mg in Group II in its chemical properties,
    (i) What name is given to this resemblance?

  (ii) Stae the products formed when the carbonates of Li and Na are strongly heated:

Li₂CO₃

Na₂CO₃

(3 marks)

(d) State the type of compound formed when Group I elements combine with non-metals 

(3 marks)

(Total = 10 marks)

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