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One Integer Value Correct Type
Direction (Q. Nos. 26-30) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).
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If propanal (CH3CH2CHO) is treated with DCI in D2O, keto-enol equilibria are established. At equilibrium, how many different enols would be existing?
    Correct answer is '4'. Can you explain this answer?
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    One Integer Value Correct TypeDirection (Q. Nos. 26-30) This section c...
    Keto-Enol Equilibrium in Propanal

    Introduction:
    In the presence of a strong base or acid, aldehydes and ketones can undergo a reaction known as keto-enol tautomerism. This equilibrium involves the interconversion between a carbonyl compound (keto form) and an enol form, which contains a double bond between a carbon and an oxygen atom.

    Explanation:
    The molecular formula of propanal is CH3CH2CHO. When propanal is treated with DCI (Deuterium chloride) in D2O (Deuterium oxide), it undergoes keto-enol tautomerism. Let's analyze the possible enol forms that can be formed during this equilibrium.

    Step 1: Formation of the Enol Form
    The keto form of propanal has a carbonyl group (-CHO) attached to the second carbon atom. In the enol form, a double bond forms between the second carbon atom and the oxygen atom.

    Step 2: Position of the Hydrogen Atom
    In the enol form, the hydrogen atom attached to the second carbon atom can be located in two different positions: alpha (α) and beta (β). The α-hydrogen is attached to the same carbon atom as the oxygen atom, while the β-hydrogen is attached to the adjacent carbon atom.

    Step 3: Isomerism
    The enol form of propanal can exist in two different isomeric forms depending on the position of the hydrogen atom. These isomers are referred to as α-enol and β-enol.

    Step 4: Deuteration
    In the given scenario, propanal is treated with DCI in D2O. This means that deuterium atoms (isotopes of hydrogen) will replace the hydrogen atoms in the reaction. Therefore, the α-enol and β-enol forms of propanal will also have deuterium atoms attached to the carbon atoms.

    Step 5: Number of Different Enols
    Since the α-enol and β-enol forms can both exist in the presence of deuterium, there will be a total of four different enols that can be formed during the keto-enol equilibrium of propanal.

    Therefore, the correct answer is '4'.

    Conclusion:
    During the keto-enol equilibrium of propanal, four different enols can be formed. This is due to the presence of α-enol and β-enol isomers, which can both exist in the presence of deuterium atoms.
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    The rate of chemical reaction at a particular temperature is proportional to the product of the molar concentration of reactants with each concentration term raised to the power equal to the number of molecules of the respective reactant taking part in the reaction. aA + bB products, rate of reaction a [Aka [Bib = k [Aka [Bib, where k is the rate constant of the reaction.EQUILIBRIUM CONSTANT (k) For a general reaction aA + bB = cC + dD, forward rate rf = kf [A]a [B]b, backward rate rb = kb [Cicpyi ,concentrations of reactants products at equilibrium are related bywhere all theconcentrations are expressed in mole/liter.In the expression of equilibrium constant those components are kept whose concentration changes with time.If equilibrium is estabilished by taking all the components in the reaction then to predict the direction of reactions we calculate the reaction quotient (Q).The values of expression at any time during reaction is called reaction quotient if Q Kc reaction proceed in backward direction until equilibrium in reached if Q Kc reaction will proceed in forward direction until equilibrium is established if Q = KC Reaction is at equilibriumQ.When C,H5OH and CH3COOH are mixed in equivalent proportion equilibrium is reached when 2/3 of acid and alcohol are used. How much ester will be present when 2 moles of acid were to react with 2 moles of alcohol? .

    The rate of chemical reaction at a particular temperature is proportional to the product of the molar concentration of reactants with each concentration term raised to the power equal to the number of molecules of the respective reactant taking part in the reaction. aA + bB products, rate of reaction a [Aka [Bib = k [Aka [Bib, where k is the rate constant of the reaction.EQUILIBRIUM CONSTANT (k) For a general reaction aA + bB = cC + dD, forward rate rf = kf [A]a [B]b, backward rate rb = kb [Cicpyi ,concentrations of reactants products at equilibrium are related bywhere all theconcentrations are expressed in mole/liter.In the expression of equilibrium constant those components are kept whose concentration changes with time.If equilibrium is estabilished by taking all the components in the reaction then to predict the direction of reactions we calculate the reaction quotient (Q).The values of expression at any time during reaction is called reaction quotient if Q Kc reaction proceed in backward direction until equilibrium in reached if Q Kc reaction will proceed in forward direction until equilibrium is established if Q = KC Reaction is at equilibriumQ.Initial concentration of A is twice the initial concentration of `B. At equilibrium concentration of A and a are same then equilibrium constant for the reaction is

    The rate of chemical reaction at a particular temperature is proportional to the product of the molar concentration of reactants with each concentration term raised to the power equal to the number of molecules of the respective reactant taking part in the reaction. aA + bB products, rate of reaction a [Aka [Bib = k [Aka [Bib, where k is the rate constant of the reaction.EQUILIBRIUM CONSTANT (k) For a general reaction aA + bB = cC + dD, forward rate rf = kf [A]a [B]b, backward rate rb = kb [Cicpyi ,concentrations of reactants products at equilibrium are related bywhere all theconcentrations are expressed in mole/liter.In the expression of equilibrium constant those components are kept whose concentration changes with time.If equilibrium is estabilished by taking all the components in the reaction then to predict the direction of reactions we calculate the reaction quotient (Q).The values of expression at any time during reaction is called reaction quotient if Q Kc reaction proceed in backward direction until equilibrium in reached if Q Kc reaction will proceed in forward direction until equilibrium is established if Q = KC Reaction is at equilibriumq.Above homogeneous reaction is carried out in a 2 litre container at a particular temperature by taking 1 mole each of A, B, C and D respectively. If Kc for the reaction is then equilibrium concentration of C is

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    One Integer Value Correct TypeDirection (Q. Nos. 26-30) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.If propanal (CH3CH2CHO) is treated with DCI in D2O, keto-enol equilibria are established. At equilibrium, how many different enols would be existing?Correct answer is '4'. Can you explain this answer?
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    One Integer Value Correct TypeDirection (Q. Nos. 26-30) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.If propanal (CH3CH2CHO) is treated with DCI in D2O, keto-enol equilibria are established. At equilibrium, how many different enols would be existing?Correct answer is '4'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about One Integer Value Correct TypeDirection (Q. Nos. 26-30) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.If propanal (CH3CH2CHO) is treated with DCI in D2O, keto-enol equilibria are established. At equilibrium, how many different enols would be existing?Correct answer is '4'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for One Integer Value Correct TypeDirection (Q. Nos. 26-30) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.If propanal (CH3CH2CHO) is treated with DCI in D2O, keto-enol equilibria are established. At equilibrium, how many different enols would be existing?Correct answer is '4'. Can you explain this answer?.
    Solutions for One Integer Value Correct TypeDirection (Q. Nos. 26-30) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.If propanal (CH3CH2CHO) is treated with DCI in D2O, keto-enol equilibria are established. At equilibrium, how many different enols would be existing?Correct answer is '4'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE. Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
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