Common chemical reactions for Sec 2
Carbon Dioxide + Water = Carbonic Acid This reaction occurs when carbon dioxide gas dissolves in water, forming a weak acid. Iron + Oxygen + Water = Hydrated Iron(III) Oxide…[...]
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Chemistry
Dissolution of Carbon Dioxide in Water
Chemical Reaction: When carbon dioxide (CO₂) gas dissolves in water (H₂O), it forms carbonic acid (H₂CO₃). The reaction is as follows: CO₂ + H₂O ⇌ H₂CO₃. This is a reversible…[...]
Read MoreChemical Changes
Chemical changes are processes where one or more substances are converted into new substances with different physical and chemical properties. These changes are fundamental to chemical reactions and are integral…[...]
Read MoreInteraction within Ecosystems
Interaction within Ecosystems Ecosystems are communities of living organisms (plants, animals, and microbes) in conjunction with the nonliving components of their environment (things like air, water, and mineral soil), interacting…[...]
Read MoreScience Topic Test : Chemical Changes, Interaction within Ecosystems , Separation Techniques (Distillation and Paper Chromatography only)
Test Paper 1: Chemical Changes What is a chemical change? A) A change in state of matter B) A change where new substances are formed C) A change that is…[...]
Read MoreAcids And Alkalis and Chemical Changes Test
Acids and Alkalis What is the pH range of strong acids? What is the pH range of weak alkalis? Name two common laboratory acids and their chemical formulas. Describe a…[...]
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Secondary 2 Science Normal Academic Topic: Chemical Changes Test Duration: 1 Hour Total Marks: 50 Part A: Multiple Choice Questions (1 mark each) Circle the correct answer. What is a…[...]
Read MoreAcids and Alkalis Test
Secondary 2 Science Normal Academic Topic: Acids and Alkalis Test Duration: 1 Hour Total Marks: 40 Part A: Multiple Choice Questions (1 mark each) Circle the correct answer. Which of…[...]
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