IGCSE Chemistry
CIE IGCSE Chemistry Solved Past Paper May/June 2019 P41

CIE IGCSE Chemistry Solved Past Paper May/June 2019 P41

bi) 12 12 1 2

       12 14 12

ii) Isotopes

iii) Because they have the same number of electrons in their outer shells

c) Beryllium metal and chloride ion

d) 2,8,3

2a) 80?

c) Because energy is needed to break the bonds between molecules

d) Vibration increased

e) Melting point decreases and boiling point increases

3a) Zinc blend is roasted in hot air to produce zinc oxide and then it is

      reduced by coke.Zinc is then collected in a condensing tray by  


b) Brass 

c) They form colorful compounds and also act as catalyst

di) Anhydrous copper(ll)sulfate

ii) From white to blue

ei) 4KI + 2CuSO42CuI + I2 + 2K2SO4

ii) 1+

iii) It gains electrons

(iv) Iodide ion

4 ai) Proton donor 

ii) CH3COO- + H+

bi) Solid dissolves faster and fizzing stops earlier

ii) Temperature, concentration of acid, and surface area of lumps 

c) 50/1000*2=0.1 mol

            (0.1)/2=0.05 mol


Mass = 84*0.05 = 4.2g

di) To make sure all of magnesium chloride goes through and none is left  


ii) To remove any remaining acid 

iii) Heat to the point of crystallisation point then let it cool, filter was and  

      dry it

ei) It is the solid formed when two solutions are mixed together

ii) Silver nitrate

5a) CnH2n

b) C5H10

C) E because it has the longest carbon chain

d) A, because it has the lowest Mr

e) Changes from brown to colourless


fii) Steam, 60 atmospheres of pressure along with phosphoric acid acting

      as a catalyst

gi) Addition polymerisation

ii) Poly(but-1-ene)

iv) CH2

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