Q. A mixture of cinnamaldehyde and crotonaldehyde is treated with concentrated alkali,

Which statement is not true about the above reaction?

Aldehydes Ketones and Carboxylic Acids Report Error

Aldol condensation takes place and -carbon atom of crotonaldehyde provides the carbanion.

Aldol condensation takes place and product will be saturated carbonyl compound.

Solution:

Removal of -hydrogen of crotonaldehyde provides more stable allylic carbanion, hence here -carbon (not ) provides the carbanion (nucleophile) for carbonyl carbon of cinnamaldehyde.

Questions from Aldehydes Ketones and Carboxylic Acids

1.
This reaction is called

AMU 2012

2. Toluene by Etard's reaction gives

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3. The reduction of benzoyl chloride with gives

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4. Acetaldehyde can be prepared by

UP CPMT 2011

5. Assertion : Glyceraldehyde reacts with to form achiral compound.
Reason : and both are oxidised.

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1. If for a certain reaction is at , the value of (in for which the same reaction will be spontaneous at the same temperature is

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2. If of a non-electrolyte solute is dissolved in of n-octane to reduce its vapour pressure to , the molar mass (in of the solute is [Given that molar mass of n-octane is

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3. An organic compound contains (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of is is ]

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4. At standard conditions, if the change in the enthalpy for the following reaction is Given that bond energy of and is and , respectively, what is the bond energy (in of ?

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5. The density of 2 M aqueous solution of NaOH is 1.28 g/cm. The molality of the solution is
[Given that molecular mass of NaOH = 40 g mol]

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Q. A mixture of cinnamaldehyde and crotonaldehyde is treated with concentrated alkali, Which statement is not true about the above reaction?

Aldol condensation takes place and -carbon atom of crotonaldehyde provides the carbanion.

Aldol condensation takes place and -carbon atom of crotonaldehyde provides the carbanion.

Aldol condensation takes place and -carbon atom of crotonaldehyde provides the carbanion.

Aldol condensation takes place and product will be saturated carbonyl compound.

Removal of -hydrogen of crotonaldehyde provides more stable allylic carbanion, hence here -carbon (not ) provides the carbanion (nucleophile) for carbonyl carbon of cinnamaldehyde.

Questions from Aldehydes Ketones and Carboxylic Acids

1. This reaction is called

2. Toluene by Etard's reaction gives

3. The reduction of benzoyl chloride with gives

4. Acetaldehyde can be prepared by

5. Assertion : Glyceraldehyde reacts with to form achiral compound. Reason : and both are oxidised.

Chemistry Most Viewed Questions

1. If for a certain reaction is at , the value of (in for which the same reaction will be spontaneous at the same temperature is

2. If of a non-electrolyte solute is dissolved in of n-octane to reduce its vapour pressure to , the molar mass (in of the solute is [Given that molar mass of n-octane is

3. An organic compound contains (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of is is ]

4. At standard conditions, if the change in the enthalpy for the following reaction is Given that bond energy of and is and , respectively, what is the bond energy (in of ?

5. The density of 2 M aqueous solution of NaOH is 1.28 g/cm. The molality of the solution is [Given that molecular mass of NaOH = 40 g mol]

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Q. A mixture of cinnamaldehyde and crotonaldehyde is treated with concentrated alkali,

Which statement is not true about the above reaction?

1.
This reaction is called

5. Assertion : Glyceraldehyde reacts with to form achiral compound.
Reason : and both are oxidised.

5. The density of 2 M aqueous solution of NaOH is 1.28 g/cm. The molality of the solution is
[Given that molecular mass of NaOH = 40 g mol]