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O2H Group
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Contains 3 sections- Aptitude ,English and Reasoning
I applied via Walk-in and was interviewed in Dec 2024. There was 1 interview round.
It was good test with mathematical learning
I applied via Campus Placement and was interviewed in Sep 2024. There was 1 interview round.
It was pretty easy focusing on quantitative aptitude
About full stack, and personal development
Coding and skill based test
O2H Group interview questions for popular designations
Esters can be converted to aldehydes by hydrolysis under acidic conditions.
Esters can be hydrolyzed to aldehydes using a strong acid, such as sulfuric acid or hydrochloric acid.
The reaction involves the cleavage of the ester bond and the formation of a carboxylic acid intermediate, which is then further reduced to an aldehyde.
The reaction can be carried out at elevated temperatures or using a catalyst, such as p-toluen...
The desired product of bromination on aniline is 2,4,6-tribromoaniline. The desired product of bromination on toluene is bromotoluene.
Bromination on aniline results in the substitution of three bromine atoms on the aromatic ring, yielding 2,4,6-tribromoaniline.
Bromination on toluene results in the substitution of one bromine atom on the aromatic ring, yielding bromotoluene.
The Grignard reaction on an aldehyde will produce a secondary alcohol.
The Grignard reaction involves the addition of a Grignard reagent (organomagnesium compound) to an aldehyde or ketone.
The reaction proceeds through the formation of a carbon-carbon bond.
In the case of an aldehyde, the product will be a secondary alcohol.
For example, the reaction of formaldehyde (HCHO) with a Grignard reagent such as methylmagnesium b...
Diastereomers and enantiomers are types of stereoisomers that differ in their spatial arrangement.
Diastereomers are stereoisomers that have different configurations at one or more chiral centers but are not mirror images of each other.
Enantiomers are stereoisomers that are non-superimposable mirror images of each other.
Diastereomers have different physical and chemical properties, while enantiomers have identical physi...
The biaryl product can be synthesized through a variety of methods.
One common method is the Suzuki-Miyaura cross-coupling reaction.
Another method is the Buchwald-Hartwig amination reaction.
Transition metal-catalyzed C-H activation can also be used.
Examples of biaryl products include biphenyl and terphenyl.
The method for preparation of amide involves the reaction between a carboxylic acid and an amine.
Amides can be prepared by the reaction of a carboxylic acid with an amine in the presence of a dehydrating agent.
The reaction typically requires heating and can be catalyzed by an acid or base.
The resulting product is an amide, which contains a carbonyl group bonded to a nitrogen atom.
Example: The preparation of acetamide c...
The proton NMR peak of methyl aldehyde appears as a singlet at around 9-10 ppm.
The proton NMR spectrum of methyl aldehyde shows a singlet peak.
The chemical shift of the peak is typically around 9-10 ppm.
The singlet peak indicates that the methyl aldehyde molecule has no neighboring protons.
Mass spectra of bromo chloro containing compound
Bromo chloro compounds can have multiple isomers with different mass spectra
The presence of bromine and chlorine atoms can cause fragmentation in the mass spectrum
The mass spectrum can be used to determine the molecular weight and structural information of the compound
I appeared for an interview before Apr 2023.
Reasoning ,maths English grammar, chemistry
I applied via Campus Placement and was interviewed in Nov 2020. There were 7 interview rounds.
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I applied via Recruitment Consultant and was interviewed in May 2020. There were 6 interview rounds.
I applied via Naukri.com
posted on 7 Jun 2020
I applied via Naukri.com and was interviewed in Dec 2019. There were 4 interview rounds.
based on 8 interviews
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