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Identify the correct statement...

Identify the correct statement

A

Aldehydes on reduction gives secondary alcohols

B

Ketones on reduction gives primary alcohols

C

Ketones reduce Fehling's solution and give red cuprous oxide

D

Ketones do not react with alcohols

Text Solution

AI Generated Solution

The correct Answer is:
To identify the correct statement regarding aldehydes and ketones, let's analyze the provided information step by step. ### Step 1: Understand the Reduction of Aldehydes - Aldehydes (RCHO) can be reduced to primary alcohols (RCH2OH). - Therefore, the statement "Aldehyde on reduction gives secondary alcohol" is incorrect. ### Step 2: Understand the Reduction of Ketones - Ketones (RC(=O)R') can be reduced to secondary alcohols (RCH(OH)R'). - Thus, the statement "Ketones on reduction gives primary alcohol" is incorrect. ### Step 3: Analyze the Reaction of Ketones with Fehling's Solution - Ketones do not react with Fehling's solution, which is used to test for reducing sugars and aldehydes. - The statement "Ketones reduce Fehling solution" is incorrect. ### Step 4: Review the Reaction of Aldehydes and Ketones with Alcohols - Aldehydes can react with alcohols to form hemiacetals and acetals. - Ketones can also react with alcohols to form similar products. - The statement "Ketones do not react with alcohols" is misleading; they do react, but the rate may differ compared to aldehydes. ### Conclusion Based on the analysis: 1. Aldehydes reduce to primary alcohols. 2. Ketones reduce to secondary alcohols. 3. Ketones do not react with Fehling's solution. 4. Both aldehydes and ketones can react with alcohols. The correct statements are: - Aldehydes give primary alcohols upon reduction. - Ketones give secondary alcohols upon reduction. ### Final Answer The correct statement is: "Aldehydes give primary alcohols and ketones give secondary alcohols upon reduction." ---

To identify the correct statement regarding aldehydes and ketones, let's analyze the provided information step by step. ### Step 1: Understand the Reduction of Aldehydes - Aldehydes (RCHO) can be reduced to primary alcohols (RCH2OH). - Therefore, the statement "Aldehyde on reduction gives secondary alcohol" is incorrect. ### Step 2: Understand the Reduction of Ketones - Ketones (RC(=O)R') can be reduced to secondary alcohols (RCH(OH)R'). ...
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ERRORLESS -ALDEHYDES AND KETONES -Ordinary Thinking (Objective Questions) Properties
  1. In the gives transformation, which the following is the most appropria...

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  2. What is the reaction of acetaldehyde with concentraed sulphuric acid

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  3. Identify the correct statement

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  4. A Wittig reaction with an aldehyde gives

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  5. Which of the donot react with fehling solution ?

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  6. Dimethyl ketones are usually characterised through

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  7. Treatment of propionaldehyde with dilute NaOH solution gives

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  8. The aldehyde which react with NaOH to produce an alcohol and sodium sa...

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  9. Cyanohydrin of which of the following forms lactic acid

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  10. Which of the following is used to detect aldehydes

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  11. Which of the following does not give brick red ppt. with Fehling solut...

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  12. Ararr(CH(3))(2)C = CHCOCH(3), A is

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  13. The end prduct in the Cannizaro's reaction of benzaldehyde is

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  14. Which one of the following does not form sodium bisulphite addition pr...

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  15. Which is most reactive of the following ?

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  16. Which of the following does not undergo Cannizzaro's reaction ?

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  17. A ketone gives a yellow precipitate, when treated with I(2)in an alkal...

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  18. The order of susceptibility of nucleophilic attack on aldehydes follow...

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  19. OHC-CHOoverset(OH^(-))toHOH(2)C-COOH. The reaction given is

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  20. HCHO and HCOOH are detected by

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