National Environmental Engineering Research Institute Project Assistant III Interview Questions and Answers

Enantiomers and diastereomers are types of stereoisomers that differ in their spatial arrangement.

• Enantiomers are mirror images of each other and cannot be superimposed on each other.

• Diastereomers are stereoisomers that are not mirror images of each other.

• Enantiomers have opposite optical rotations and identical physical properties.

• Diastereomers have different physical and chemical properties.

• Examples of enantiomers in...read more

Phenol > Benzoic acid > Benzaldehyde in polarity order.

• Polarity is determined by the presence of polar functional groups.

• Phenol has a hydroxyl group making it the most polar.

• Benzoic acid has a carboxyl group making it more polar than benzaldehyde which has an aldehyde group.

The H1 NMR value of aldehyde is typically between 9-10 ppm.

• The H1 NMR value is affected by the chemical environment of the aldehyde group.

• The value can vary depending on the specific aldehyde.

• Examples include formaldehyde (9.5 ppm) and acetaldehyde (9.2 ppm).

The value of H1 of amine proton depends on the specific amine compound.

• The H1 value can be determined through NMR spectroscopy.

• Different amine compounds have different H1 values.

• The H1 value can provide information about the structure and properties of the amine compound.

Aromaticity refers to the property of certain organic compounds that exhibit a unique stability and resonance due to a delocalized ring of electrons.

• Aromaticity is a concept in organic chemistry.

• It is characterized by a cyclic structure with a continuous system of overlapping p orbitals.

• Aromatic compounds often have a distinct odor.

• They are highly stable and resistant to chemical reactions.

• Aromaticity is determined by ...read more

Ethyl acetate is a compound with the chemical formula CH3COOCH2CH3. It has a sweet, fruity odor and is commonly used as a solvent.

• The structure of ethyl acetate consists of an ethyl group (CH3CH2-) attached to the carbonyl carbon of an acetate group (-COO-).

• The NMR value of ethyl acetate can be interpreted by analyzing the chemical shifts and splitting patterns of its protons.

• In the 1H NMR spectrum of ethyl acetate, th...read more

Managing customers requires effective communication, understanding their needs, and building strong relationships.

• Establish clear communication channels and set expectations

• Listen actively to their needs and concerns

• Provide regular updates and progress reports

• Build trust and rapport through positive interactions

• Address any issues or concerns promptly and professionally