ZIMSEC A Level Chemistry Paper 3 Past Papers

Topics in this paper

Organic Chemistry Atomic Structure and Bonding Reaction Kinetics Thermochemistry and Energetics Electrochemistry Chemical Equilibriumenvironmental chemistry / nanochemistrytransition metals / partitioncatalysis / environmental chemistrygenetic fingerprinting / electrophoresis

Explained questions

What is the composition of the free radical of chlorine, $^{35}Cl$ ?
A mixture of equal volumes of methane and ethane was burned in excess oxygen. After cooling to room temperature, the residual gas absorbed in $KOH_{(aq)}$ was found to be 30 $cm^3$ . What was the volume of methane at the beginning?
What is the order of increasing energy of given orbitals in an atom of titanium?
Which statement about relative atomic mass is correct?
Which ion contains an unpaired electron?
What are the products of complete combustion of silane?
What changes in oxidation numbers take place when copper reacts with concentrated nitric acid to give a blue solution and a brown acidic gas?
A research student performed a constant current electrolysis of silver solution using a carbon electrode as the cathode. The electrolysis was allowed to proceed for 0.25 hours at a limiting current of 1.25 A. What is the mass of silver deposited?
Which ion is least polarising?
Which statement always applies to an electrophile?
Element X forms a chloride which is hydrolysed by water to form an acidic solution. Oxide of X reacts with an acid to form a salt. What is X?
Which compound has the greatest numerical value of lattice energy?
With which reagent do phenol and phenylamine give similar reactions?
Which reagent detects the presence of added alcohol in petrol consisting of a mixture of alkanes and alkenes?
Which statement is true about the enthalpy change of atomisation?
The graph shows the mass spectrum of an organic compound X.
An acidic solution of $MnO_4^{2-}_{(aq)}$ undergoes the reaction shown below:
Which statement about transition elements is correct?
Which structure represents the gaseous $SnCl_2$ molecule?
Nitrogen dioxide decomposes on heating according to the equation:
Which two assumptions are made in the kinetic theory of gases?
Which graph shows the variation of volume of an ideal gas with temperature at constant pressure?
Which graph shows the change in electronegativity down a group?
In a reaction $X + Y \rightarrow 2Z$ , it was found that doubling the concentration of X caused the rate to increase four times but doubling Y did not affect the rate. What is the rate equation?
Which of the following is the weakest acid in aqueous solution?

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