Waec 2025 Chemistry Question 3

Practice essay / theory question 3 from the 2025 Waec Chemistry examination. This question covers General .

Waec 2025 Chemistry Essay / Theory
Topic: General
Question 3 WAEC • 2025 • CHEMISTRY • essay

Answer all the questions in this section.

Question Parts

( a )
Consider the following elements: Na; Cl; Ca and O.
( b )
When drops of compound X are added to calcium oxide, compound Y is produced. Y reacts with ammonium chloride on heating to produce gas Z which turns damp red litmus paper blue.
( c )
Write a balanced equation for the reaction of aluminium with oxygen.
( d )
What mass of oxygen would react with 9.0 g of aluminium? [ \( \mathrm{O}=16.0 \), \( ext{AI} =27.0 \)]
( e )
Name the element that is added to natural rubber to improve its quality.
( f )
What is a disproportionation reaction?
( g )
Give the oxidation state of phosphorus in each of the following species:

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About This Question

This is Waec 2025 Chemistry Question 3. It is one of the essay questions from the 2025 Waec Chemistry examination.

The question covers General .

View More Waec 2025 Chemistry Questions More Waec Practice Questions Back to Questions

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