Which of the following reaction is used to prepare the 5,5-Diphenylhydantoin? * 1-Electrophilic substitution reaction 2- 1,4 Rearrangement reaction nucleophilic reaction 3- Nucleophilic substitution reaction and 1,2 rearrangement reaction 4- Acetylating reactio
Which of the following reaction is used to prepare the 5,5-Diphenylhydantoin? * 1-Electrophilic substitution reaction 2- 1,4 Rearrangement reaction nucleophilic reaction 3- Nucleophilic substitution reaction and 1,2 rearrangement reaction 4- Acetylating reactio
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Concept explainers
Catalysis and Enzymatic Reactions
Catalysis is the kind of chemical reaction in which the rate (speed) of a reaction is enhanced by the catalyst which is not consumed during the process of reaction and afterward it is removed when the catalyst is not used to make up the impurity in the product. The enzymatic reaction is the reaction that is catalyzed via enzymes.
Lock And Key Model
The lock-and-key model is used to describe the catalytic enzyme activity, based on the interaction between enzyme and substrate. This model considers the lock as an enzyme and the key as a substrate to explain this model. The concept of how a unique distinct key only can have the access to open a particular lock resembles how the specific substrate can only fit into the particular active site of the enzyme. This is significant in understanding the intermolecular interaction between proteins and plays a vital role in drug interaction.
Question
Which of the following reaction is used to prepare the 5,5-Diphenylhydantoin? *
1-Electrophilic substitution reaction
2- 1,4 Rearrangement reaction nucleophilic reaction
3- Nucleophilic substitution reaction and 1,2 rearrangement reaction
4- Acetylating reaction
____________________________________________________
What is the purpose of adding 15 mL cold water to mixture in preparation of benzilic acid? *
To wash the mixture
To convert all ionic compounds to neutral
To hydrolyze the mixture
To dilute the mixture
________________________________________________________________________
What is the purpose of adding first 20 drops of water to the reaction flask in preparation of aspirin? *
To cool the reaction
To hydrolyse the excess amount of acetic anhydride
To remove the impurity of salicylic acid
To form the crystals
______________________________________________________
Which of the following compound is eliminated from reaction of benzil with urea to form the phenytoin? *
NH3
H2O
HCl
CH3COOH
________________________________________________________
What is the purpose of adding one drop of 10% NaOH solution in preparation of benzil experiment? *
To check the purity of benzoin
To neutralize the benzil
To check the presence of unoxidized benzoin
To form the crystals
________________________________________________________________
Which techniques is used to prepare 5,5-diphenylhydantoin? *
Distillation
Refluxing
Extraction
Column chromatography
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