The tests performed on compound X and their inferences are :

	Test	Inference
(a)	2, 4 - DNP test	Coloured precipitate
(b)	Idoform test	Yellow precipitate
(c)	Azo-dye test	No dye formation

Compound 'X' is :

The correct match between Item-I and Item-II is :

Item-I (drug)		Item-II (test)
A	Chloroxylenol	P	Carbylamine test
B	Norethindrone	Q	Sodium hydrogen carbonet test
C	Sulphapyridine	R	Ferric chloride test
D	Penicillin	S	Bayer's test

For standardizing NaOH solution, which of the following is used as a primary standard ?

In a complexometric titration of metal ion with ligand
M(Metal ion) + L(Ligand) $$ \to $$ C(Complex) end point is estimated spectrophoto - metrically (through light absorption). If 'M' and 'C' do not absorb light and only 'L' absorbs, then the titration plot between absorbed light (A) versus volume of ligand 'L' (V) would look like :