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An organic compound of molecular formula...

An organic compound of molecular formula `C_(3)H_(6)O` did not give a silver mirror with with Tollens' reagent but give an oxime with hydroxylamine. It may be

A

`CH_(2)=CH-CH_(2)-OH`

B

`CH_(3)COCH_(3)`

C

`CH_(3)CH_(2)CHO`

D

`CH_(2)=CH-OCH_(3)`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to analyze the given information about the organic compound with the molecular formula \( C_3H_6O \). ### Step 1: Identify the functional groups The molecular formula \( C_3H_6O \) suggests that the compound could be an aldehyde, ketone, or alcohol. However, the key information provided is that the compound does not give a silver mirror with Tollens' reagent. This indicates that the compound is not an aldehyde, as aldehydes typically react with Tollens' reagent to produce a silver mirror. **Hint:** Recall that Tollens' reagent is used to test for aldehydes, which reduce silver ions to metallic silver. ### Step 2: Determine the possible types of compounds Since the compound is not an aldehyde, we can consider the possibility of it being a ketone or an alcohol. However, the problem states that the compound gives an oxime with hydroxylamine, which is a reaction characteristic of carbonyl compounds (aldehydes and ketones). **Hint:** Oximes are formed from carbonyl compounds (aldehydes and ketones) when they react with hydroxylamine. ### Step 3: Analyze the reaction with hydroxylamine The formation of an oxime indicates that the compound must contain a carbonyl group (C=O). Since we have already established that it is not an aldehyde, it must be a ketone. For example, if the compound were propanone (acetone), it would react with hydroxylamine to form propanone oxime. **Hint:** Ketones react with hydroxylamine to form oximes, while aldehydes do the same but are ruled out here. ### Step 4: Confirm the structure of the ketone The molecular formula \( C_3H_6O \) corresponds to propanone (acetone), which is a ketone. The structure of propanone is: \[ \text{CH}_3\text{C(=O)}\text{CH}_3 \] This confirms that the compound is indeed a ketone, as it has the required carbonyl group. **Hint:** Check the structural formula to ensure it matches the molecular formula given. ### Step 5: Conclusion Based on the analysis, the organic compound with the molecular formula \( C_3H_6O \) that does not give a silver mirror with Tollens' reagent but gives an oxime with hydroxylamine is propanone (acetone). **Final Answer:** The compound is a ketone, specifically propanone (acetone).
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NCERT FINGERTIPS ENGLISH-ALDEHYDES, KETONES AND CARBOXYLIC ACIDS-MCQs( CHEMICAL REACTIONS )
  1. A compound 'A' having the molecular formula C(5)H(12)O, on oxidation ...

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  2. To differentiate between pentan -2-one and pentan -3-one a test is ca...

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  3. An organic compound of molecular formula C(3)H(6)O did not give a silv...

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  4. Which is the correct method of synthesising acetamide from acetone?

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  5. Compound (X) with molecular formula C(3)H(8)O is treated with acidifie...

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  6. Which of the following compounds will give a coloured crystalline com...

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  7. Match the column I with column II and mark the appropriate choice .

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  8. Few simple chemical tests are given below to differentiate between the...

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  9. Which of the following will not give aldol condensation ?

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  10. The claisen schmidt condensation product of benzaldehyde and acetone i...

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  11. Study the following sequence of reaction and identify the product (Y)....

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  12. Identify (X), (Y) and (Z) in the given reaction. X +Y overset(Z) to ...

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  13. Propanal on treatment with dilute sodium hydroxide gives

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  14. Aldehydes that do not undergo aldol condensation are (1) propanal (...

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  15. The order of reactivity of CH(3)CHO, CH(3)COC(2)H(5) and CH(3)COCH(3) ...

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  16. The final product (Y) in the following sequence of chemical reaction i...

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  17. Which of the following is a correct statement ?

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  18. Which of the following is the most reactive isomer ?

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  19. When propanal reacts with 2- methylpropanal in presence of NaOH, four ...

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  20. Fill in the reagents for the given conversion : CH(3)COCl overset((...

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