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The table lists some properties of the straight-chained carbon compounds W, X, Y and Z - HSC - SSCE Chemistry - Question 15 - 2016 - Paper 1
Question 15
The table lists some properties of the straight-chained carbon compounds W, X, Y and Z. | Compound | Reactivity in bromine water | Solubility in water | |----------... show full transcript
Worked Solution & Example Answer:The table lists some properties of the straight-chained carbon compounds W, X, Y and Z - HSC - SSCE Chemistry - Question 15 - 2016 - Paper 1
Step 1
Identify characteristics of compounds based on reactivity and solubility
Answer
To identify the compounds based on their reactivity and solubility, we analyze the given properties:
- Compound W: Rapidly decolourises in bromine water indicates it likely has a double bond (alkene) and is less soluble in water.
- Compound X: Unreactive and insoluble suggests it is a saturated compound (alkane).
- Compound Y: Unreactive and soluble implies an alcohol (hydroxyl group).
- Compound Z: Unreactive and partly soluble suggests it is also an alcohol but with a longer carbon chain or branched structure.
Step 2
Choose the correct identification from the options
Answer
After matching the properties of each compound with the choices:
- W (alkene): C₃H₈ (propene)
- X (alkane): C₁H₆ (propane)
- Y (alcohol): CH₄OH (methanol)
- Z (alcohol): CH₄OH (could be ethanol or similar)
The correct choice is (A) because it matches the reactivity and solubility characteristics for each compound.