Except Beryllium and Magnesium, other elements of Gr. IIA give characteristic colour in flame. Explain why ?

Elements of IA group give flame colour due to :

How does nitrogen differ from other elements of Gr-15?

Scarlet flame colour of bunsen flame is characteristic of :

Why are Gr 16 elements called chalcogens ?

Carboxylic acids do not give the characteristic reactions of carbonyl group,explain.

(i) How will you convert phenol to benzoic acid? (ii) An organic compound A having molecular formula, C_6H_6O gives a characteristic colour with aqueous FeCl_3 solution. A on treatment with CO_2 and NaOH at 400 K under pressure gives B which on acidification gives a compound C. The compound C reacts with acetyl chloride to give D which is a popular pain killer. Deduce the structure of A, B, C and D.

Why are the Gr-18 elements called as inert gases ?

A solid (S) is a compound of group 1 element and gives violet colour in the flame test. (S) is:

Give the electronic configuration of an element of Gr IB of 4th period.