There is a solution of p-hydroxybenzoic acid and p-amino benzonoc acid. Discuss one method by which we can separate them and also write down the confirmatory test of the functional group present.

You have an ether solution containing 4-hydroxybenzoic acid and 4-aminobenzoic acid. Explain, how will you separate the two in not more than 3 steps? Give confirmatory tests with reagents and conditions for functional groups of each.

An organic acid X is a liquid , which of ten freezes during wintr time in cold countries having the molecualr formula C_(2)H_(4)O_(2). On warming it with methanol in the presence of a few drops of concentrated suphuric acid, a compound Y with a sweet smell is formed. (a) Identify X and Y .Also write theri formulae showing the functional group present in them. (b) Write a chemical equation for the reactio involved.

Which of the functional group(s) is/are present in the amino acids ?

Enzymes are proteins, Proteins are long chains of amino acids linked to each other by peptide bonds. Amino acids have many functional groups in their structure. These functional groups are many of them at least, ionisable. As they are weak acids and bases in chemical nature, this ionisatio is infuluenced by pH of the solution. For many enzymes, activity is influenced by surrounding pH. This is depicted in the curve below, explain briefly.

When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved which is utilized in the hydrogenation of oil. Name the gas evolved. Write the chemical equation of the reaction involved and also write a test to detect the gas formed.