What are the expected products of hydrolysed of lactose?
Molecules which have polar nature are capable to form hydrogen bond are generally soluble in water. In sucrose and glucose hydroxyl groups are present, which is polar in nature. Therefore, they are involved in intermolecular hydrogen bonding with water molecules, so these compounds are readily soluble in water. On other hand benzene and cyclohexane are hydrocarbons. They do not have any polar group so they cannot make hydrogen bonds with water.
Where does the water present in the egg go after the boiling the egg?
Denaturation of proteins is a process in which physical and biological properties of protein without changing the chemical composition of protein. In an egg denaturation of protein is the coagulation of albumin present in the white of an egg. When egg is boiled in water, the globular proteins present in it changes to a rubber like insoluble mass which absorbs all water present in the egg.
How do you explain the absence of aldehyde group in the penta acetate of D-glucose?
Glucose reacts with hydroxylamine to form an oxime. where as, the penta acetate of glucose does not react with hydroxyl amine indicating the absence of free CHO group.
The melting points and solubility of water of amino acids are generally higher than that of the corresponding halo acids. Explain.
Amino acids are dipolar in nature (+NH3-CHR-COO-) and have strong dipolar interaction. Amino acids have amino (basic) group and carboxylic (acidic) group. A proton which comes from carboxylic group is accepted by amino group. Thus amino acid exists in the form of Zwitter ion.
Due to this ionic form, amino acids become crystalline solids and due to this salt like structure, show higher melting point.
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