Duru Cooperation Interview Questions and Answers

There are 7 buttons on my shirt.

• There are typically 7 buttons on a men's dress shirt.

• The number of buttons may vary depending on the style and design of the shirt.

• Buttons are used for fastening the shirt and can be made of various materials like plastic, metal, or mother of pearl.

Grignard reaction involves the addition of an organomagnesium halide to a carbonyl compound to form a new carbon-carbon bond.

• Formation of Grignard reagent by reacting magnesium with an alkyl or aryl halide

• Addition of the Grignard reagent to a carbonyl compound to form a tertiary alcohol

• Mechanism involves nucleophilic addition of the Grignard reagent to the carbonyl carbon

• Commonly used in organic synthesis to create complex molecules

• Example: Formation of phenylmagnesium bromid...read more

Spectroscopy is the study of the interaction between matter and electromagnetic radiation.

• It involves analyzing the absorption, emission, or scattering of light by atoms or molecules.

• Different types of spectroscopy include UV-Vis, IR, NMR, and mass spectrometry.

• Spectroscopy is used in various fields such as chemistry, physics, astronomy, and environmental science.

Chromatography is a technique used to separate and analyze mixtures of chemicals based on their properties.

• Chromatography involves a stationary phase and a mobile phase

• Different compounds in the mixture interact differently with the stationary phase, leading to separation

• Examples include gas chromatography, liquid chromatography, and paper chromatography

Molarity is the concentration of a solution expressed as the number of moles of solute per liter of solution. Molality is the concentration of a solution expressed as the number of moles of solute per kilogram of solvent.

• Molarity is measured in moles per liter (M)

• Molality is measured in moles per kilogram (m)

• Molarity changes with temperature due to volume changes, while molality remains constant

• Molarity is commonly used in laboratory settings, while molality is used in certai...read more

Polar solvents are substances that have a positive and negative charge distribution, making them capable of dissolving polar compounds.

• Polar solvents have a partial positive and partial negative charge, allowing them to interact with polar molecules.

• Examples of polar solvents include water, acetone, ethanol, and methanol.

• These solvents are commonly used in various chemical reactions and processes due to their ability to dissolve a wide range of compounds.

• Polar solvents are of...read more

Protic polar solvents are solvents that contain hydrogen atoms connected directly to an electronegative atom, such as oxygen or nitrogen.

• Protic polar solvents have a partial positive charge on the hydrogen atom and a partial negative charge on the electronegative atom.

• These solvents are capable of forming hydrogen bonds with solutes, making them useful in various chemical reactions.

• Examples of protic polar solvents include water, alcohols (such as methanol and ethanol), and c...read more