igcse-past-papers-analysis

Here is a complete analysis of the igcses chemistry past paper for: May 2024, Paper 41

Q1-Name the processes-

Learn to:

• Write the names of all process mentioned, in your chemistry syllabus[7]- May 2024 Paper 41;-q2

Q2-Calculation based:[5]

• Learn tto calculate the sub-atomic particles for atoms and ions for all the  elements present in your syllabus. [5] May 2024 Paper 41;-q2

Q3(a) Write symbol equation[1] -

Learn to  make a list of all reactions that are present in your syllabus May 2024 Paper 41;-3a

Q3(b)You have been provided a table which includes the names and properties of  of elements, compounds.

• Then you have been asked to explain
• You have also been asked to draw   a dot / cross diagram 

Learn to:

•  Make a list of  All elements /compounds present in your syllabus and be able to explain the reason for the physical and chemical properties of these elements and compounds

Q3(c)

• You need to define electrolysis
• You need to write ionic half equation.

Learn to:

• Make a list of all definitions of your syllabus
• Master writing ionic half equations for all electrolysis reactions

4(a)

• You need to ‘explain the meaning of the term equilibrium’
• You need to explain why equilibrium position does not change
• You need to suggest the reason for the colour changes in the reaction
• You need to explain the effect of  temperature on the position of equilibrium.
• You need to deduce the oxidation number of compounds and molecules
• Another organic chemistry reaction is mentioned. You need to state the effect of catalyst on the equilibrium and also on the activation energy

Learn:

• Explanation of various terms.
• Explain the effect of various factors on position of equilibrium
• Practice deducing oxidation numbers

 

5(a)

• The question asks to name the salts needed to produce the precipitate
• The question asks you to explain the process of obtain pure  sample of insoluble salt
• The question asks you to write ionic equation for the precipitation reaction , with state symbols

Learn 

• Write word and symbol equations for making salts by precipitation
• Explain the method of making pure salts by precipitation
• Write ionic equation for every precipitation reaction

(b). You need to describe the test for sulfur dioxide gas

Learn to:

Describe tests for all gases mentioned  in the syllabus

( c ) You need to balance a given chemical equation of decomposition.

Learn to:

• Balance all equations present in the syllabus.

(d):

• You need to explain the test for the presence of water
• You need to find the moles of water.

 

 

Q6(a)  This question is on iron extraction.

(b) This question is on zinc extraction

(c) This question is on rusting

(d)

• You need to name neutral oxides
• You need to deduce the formula of compounds containing complex ions.
• You need to write the reaction between Oxide and acid

7(a)

• You need to deduce empirical and molecular formula

7(b)

• write the displayed formula
• Identifdy the monomer
• Write symbol equation  for organic chemistry reaction

 

7d

• (1)This is on structural isomers
• This is on formation of esters
• This is on  displayed formula of carboxylic acid

Learn to analyse the past  exam papers for various subject. Simply solving without understanding  the type of concepts that have been  asked in the previous years, will not help you in predicting the paper papttern for the coming years. If you want to really be  well prepared, learn analysing. Here is the alaysis of one chemistry past exam paper.