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IGCSE Chemistry- Organic Chemistry Practice Exam Questions & Answers.

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IGCSE Chemistry- Organic Chemistry Practice Exam Questions & Answers. Molecular formula for methane - CORRECT ANSWER CH4 Molecular formula for ethane - CORRECT ANSWER C2H6 Molecular formula for propane - CORRECT ANSWER C3H8 Molecular formula for butane - CORRECT ANSWER C4H10 Molecu...

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  • July 26, 2024
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  • 2023/2024
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IGCSE Chemistry- Organic Chemistry Practice Exam Questions & Answers.
Molecular formula for methane - CORRECT ANSWER CH4
Molecular formula for ethane - CORRECT ANSWER C2H6
Molecular formula for propane - CORRECT ANSWER C3H8
Molecular formula for butane - CORRECT ANSWER C4H10
Molecular formula for pentane - CORRECT ANSWER C5H12
General formula for alkanes - CORRECT ANSWER CnH2n+2
Structural formula for methane - CORRECT ANSWER CH4
Structural formula for ethane - CORRECT ANSWER CH3 CH3
Structural formula for propane - CORRECT ANSWER CH3 CH2 CH3
Structural formula for butane - CORRECT ANSWER CH3 CH2 CH2 CH3
Structural formula for pentane - CORRECT ANSWER CH3 CH2 CH2 CH2 CH3
Displayed formula for methane - CORRECT ANSWER Displayed formula for ethane - CORRECT ANSWER Displayed formula for propane - CORRECT ANSWER Displayed formula for butane - CORRECT ANSWER Displayed formula for pentane - CORRECT ANSWER What type of bonds are there between alkanes? - CORRECT ANSWER Covalent bonds
During combustion of hydrocarbons what is produced? - CORRECT ANSWER Energy (when there is lots of oxygen)
What is the equation for incomplete combustion and complete combustion of hydrocarbons? - CORRECT
ANSWER If there is a limited supply of oxygen during combustion of hydrocarbons what is produced? - CORRECT ANSWER Carbon monoxide or carbon
How is carbon monoxide dangerous? - CORRECT ANSWER It is poisonous and combines with the haemoglobin in the blood, preventing the blood form carrying oxygen around the body.
What happens when bromine water is added to an alkene? - CORRECT ANSWER Changes colour from brown to colourless. It starts with a double bond but the bromine water removes it making it have only a single bond.
What happens when bromine water is added to an alkane? - CORRECT ANSWER No colour change is seen.
What happens if the reactants are put under a bright UV light? - CORRECT ANSWER Orange-yellow colour goes to colourless.

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