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Compound Q is obtained by adding H₂O across the double bond in compound P - CIE - A-Level Chemistry - Question 37 - 2015 - Paper 1

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Compound Q is obtained by adding H₂O across the double bond in compound P. Which statements about these two compounds are correct? 1. P shows cis-trans isomerism. ... show full transcript

Worked Solution & Example Answer:Compound Q is obtained by adding H₂O across the double bond in compound P - CIE - A-Level Chemistry - Question 37 - 2015 - Paper 1

Step 1

1. P shows cis-trans isomerism.

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Answer

Compound P has a double bond and two different groups attached to the carbons of that double bond. This structural feature enables cis-trans isomerism due to restricted rotation around the double bond. Therefore, statement 1 is correct.

Step 2

2. Q contains two chiral centres.

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Answer

Compound Q is formed from the addition of water across the double bond in P. After this addition, Q will have two carbon atoms that are bonded to four different substituents, making them chiral centers. Thus, statement 2 is also correct.

Step 3

3. Q is a tertiary alcohol.

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Answer

In compound Q, the hydroxyl (-OH) group is attached to a carbon that is bonded to three other carbon atoms, making it a tertiary alcohol. Therefore, statement 3 is correct.

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