Answer the questions below with reference to the organic compounds A, B, C and D. A. CH₃CH₃ B. CH₃CH₂OH C. CH₃COOH D. C₆H₆ (a) Which one of the compounds A, B, C or D has no planar carbon atom? (b) Name the compounds A, B, C and D. (c) What type of reaction is involved in the conversion of B to C? (d) Name the common flavouring agent that consists of a 6% (v/v) solution of C. The conversion of B to A is carried out in the school laboratory using the apparatus shown on the right. (e) (i) Identify the substance X. (ii) Describe the appearance of this substance. (iii) How is compound B held at position Y in the test tube? (iv) Why should the delivery tube be removed from the stand when the flow of water before heating is stopped? (f) The usual representation of the structure of compound D is shown in the diagram on the right. (g) What term is used for organic compounds that contain this structure? (h) What serious health hazard is associated with compound D?

Leaving Cert Chemistry Organic Chemistry: Answer the questions below with

Answer the questions below with reference to the organic compounds A, B, C and D - Leaving Cert Chemistry - Question 7 - 2009

Question 7

Answer the questions below with reference to the organic compounds A, B, C and D. A. CH₃CH₃ B. CH₃CH₂OH C. CH₃COOH D. C₆H₆ (a) Which one of the compounds A, B, C o... show full transcript

Worked Solution & Example Answer:Answer the questions below with reference to the organic compounds A, B, C and D - Leaving Cert Chemistry - Question 7 - 2009

Step 1

Which one of the compounds A, B, C or D has no planar carbon atom?

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Answer

Compound B, which is ethanol, has no planar carbon atom. This is because ethanol contains a tetrahedral arrangement around the carbon atoms due to the presence of single bonds.

Step 2

Name the compounds A, B, C and D.

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Answer

A: Ethene (ethylene), B: Ethanol, C: Ethanoic acid (acetic acid), D: Benzene.

Step 3

What type of reaction is involved in the conversion of B to C?

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Answer

The conversion of B (ethanol) to C (ethanoic acid) involves an oxidation reaction.

Step 4

Identify the substance X.

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Answer

The substance X is alumina (aluminum oxide), represented as Al₂O₃.

Step 5

Describe the appearance of this substance.

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Answer

Alumina appears as a white solid.

Step 6

How is compound B held at position Y in the test tube?

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Answer

Compound B is held at position Y in the test tube using glass wool (rock wool) that acts as a support.

Step 7

Why should the delivery tube be removed from the stand when the flow of water before heating is stopped?

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Answer

The delivery tube should be removed from the stand to prevent suck-back, which could lead to the backflow of water into the apparatus.

Step 8

What term is used for organic compounds that contain this structure?

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Answer

The term used for organic compounds that contain this structure is 'aromatic.'

Step 9

What serious health hazard is associated with compound D?

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The serious health hazard associated with compound D (benzene) is that it is carcinogenic, meaning it can cause cancer.

Answer the questions below with reference to the organic compounds A, B, C and D - Leaving Cert Chemistry - Question 7 - 2009

Worked Solution & Example Answer:Answer the questions below with reference to the organic compounds A, B, C and D - Leaving Cert Chemistry - Question 7 - 2009

Which one of the compounds A, B, C or D has no planar carbon atom?

Name the compounds A, B, C and D.

What type of reaction is involved in the conversion of B to C?

Identify the substance X.

Describe the appearance of this substance.

How is compound B held at position Y in the test tube?

Why should the delivery tube be removed from the stand when the flow of water before heating is stopped?

What term is used for organic compounds that contain this structure?

What serious health hazard is associated with compound D?

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