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GCSE
Gcse Chemistry
Chemical Reactions
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Q.1
What type of reaction is shown by the following word equation? Hydrochloric acid + sodium hydroxide → sodium chloride + water
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Decomposition
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Displacement
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Neutralisation
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Combustion
Q.2
What type of reaction occurs when limestone (calcium carbonate) is heated and becomes calcium oxide?
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Oxidation
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Reduction
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Thermal decomposition
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Combustion
Q.3
What is the only reaction that removes carbon dioxide from the atmosphere naturally?
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Decomposition
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Combustion
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Respiration
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Photosynthesis
Q.4
What type of reaction occurs at the positive electrode when copper sulfate is electrolysed using copper electrodes?
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Oxidation
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Reduction
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Combustion
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Decomposition
Q.5
What type of reaction is shown in the symbol equation? Fe O + 3CO → 2Fe + 3CO
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Oxidation
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Combustion
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Reduction
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Decomposition
Q.6
What type of reaction does the following word equation describe? Magnesium + zinc chloride → magnesium chloride + zinc
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Oxidation
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Reduction
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Thermal decomposition
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Displacement
Q.7
What type of reaction occurs when hydrocarbons burn in an insufficient supply of oxygen?
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Combustion
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Incomplete combustion
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Reduction
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Thermal decomposition
Q.8
What reaction is occurring when decane is split into ethene and octane?
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Cracking
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Polymerisation
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Reduction
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Neutralisation
Q.9
What reaction is involved in the production of poly(ester)?
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Cracking
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Polymerisation
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Decomposition
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Neutralisation
Q.10
What reaction is involved in the hardening of vegetable oils?
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Polymerisation
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Cracking
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Hydrogenation
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Setting
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