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WorksheetsChemical Changes
Total questions: 15
Worksheet time: 20mins
You can tell a chemical reaction because it always produces _________
A different substance
Reactants
A change of state
Water
Which one of the following represents a physical change _______
Iron rusting
Water burning
Paper burning
Dynamite exploding
What kind of chemical reaction is where one substance is broken down into two substances?
Photosynthesis
Combustion
Synthesis reaction
Decomposition reaction
To balance a chemical equation, you should change only the __________
Location of the narrow
Chemical formulas
Subscripts
Coefficients
In the following are types of chemical change, interaction between matter and oxygen ____
Oxidation and combustion
Synthesis and oxidation
Decomposition and photosynthesis
Decomposition and combustion
Combustion of sulfur occurs in power stations and factory, which one on the following is called pollutant _____
Sulfur
Sulfur dioxide
Oxygen
Dihydrogen oxide
What is electrolysis _______
Chemical decomposition of substances with light
Chemical synthesis of substances with light.
chemical decomposition of substances with an electric current
Chemical synthesis of substances with an electric current
Decorative pattern can be carved onto metal objects using technique called ______
Electroplating
Electrolysis
Acid etching
Carbonates
On the following are indacators, except ____
Litmus paper
Universal indicator
Purple cabbage solution
Neutral solution
Harmful effect of chemical changes in burning, except _____
Acid rain
Air pollutants
Iron rust
Particulate material
What are 3 differences between chemical change and physical change?
(a)
Give 5 example acid solution?
State 3 benefits of chemical changes !
What is litmus paper?
(a)
What is neutralization ? make chemical equation in neutralization reaction!
(a)
