Which ONE of the following compounds has the LOWEST melting point?
A
Hexane
B
Ethane
C
Butane
D
Octane
When CH₂ = CH₂ is converted to CH₃CH₃, the type of reaction is …
A
hydration - NSC Physical Sciences - Question 1 - 2022 - Paper 2
Question 1
Which ONE of the following compounds has the LOWEST melting point?
A
Hexane
B
Ethane
C
Butane
D
Octane
When CH₂ = CH₂ is converted to CH₃CH₃, the type of reacti... show full transcript
Worked Solution & Example Answer:Which ONE of the following compounds has the LOWEST melting point?
A
Hexane
B
Ethane
C
Butane
D
Octane
When CH₂ = CH₂ is converted to CH₃CH₃, the type of reaction is …
A
hydration - NSC Physical Sciences - Question 1 - 2022 - Paper 2
Step 1
Which ONE of the following compounds has the LOWEST melting point?
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Answer
Ethane (B) has the lowest melting point among the given options. This is due to its smaller molecular size compared to the others, leading to weaker London dispersion forces.
Step 2
When CH₂ = CH₂ is converted to CH₃CH₃, the type of reaction is …
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Answer
The reaction is a hydrogenation (D). In this process, the double bond in ethylene (CH₂=CH₂) is converted into a single bond in ethane (CH₃CH₃) through the addition of hydrogen.
Step 3
Which ONE of the following compounds in solution will change the colour of bromothymol blue?
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Answer
Acetic acid (B) or CH₃COOH can change the colour of bromothymol blue in solution due to its acidic properties, potentially lowering the pH when dissolved.
