JEE Main 2020 (Online) 6th September Evening Slot

MCQ (Single Correct Answer)

-1

Match the following :

Test/Method	Reagent
(i) Lucas Test	(a) C₆H₅SO₂Cl/ aq. KOH
(ii) Dumas method	(b) HNO₃/ AgNO₃
(iii) Kjeldahl’s method	(c) CuO/CO₂
(iv) Hinsberg test	(d) Conc. HCl and ZnCl₂
	(e) H₂SO₄

(i)-(b), (ii)-(d), (iii)-(e), (iv)-(a)

(i)-(d), (ii)-(c), (iii)-(e), (iv)-(a)

(i)-(b), (ii)-(a), (iii)-(c), (iv)-(d)

(i)-(d), (ii)-(c), (iii)-(b), (iv)-(e)

JEE Main 2020 (Online) 7th January Morning Slot

MCQ (Single Correct Answer)

-1

A solution of m-chloronailimne, m-chlorophenol and m-chlorobenzoic acid in ethyal acetate was extracted initially with a saturated solution of NaHCO₃ to give fraction A. The left over organic phase was extracted with dilute NaoH solution tio give fraction B. The final organiic layer was labelled as fraction C. Fractions A,B and C, contain respectively :

m-chlorobenzoic acid, m-chloroaniline and m-chlorophenol.

m-chlorobenzoic acid, m-chlorophenol and m-chloroaniline.

m-chlorophenol, m-chlorobenzoic acid and m-chloronailine.

m-chloroaniline m-chlorobenzoic acid and m-chlorophenol.

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

-1

A solution containing a group-IV cation gives a precipitate on passing H₂S. A solution of this precipitate in dil.HCl produces a white precipitate with NaOH solution and bluish-white precipitate with basic potassium ferrocyanide. The cation is :

Co²⁺

Ni²⁺

Mn²⁺

Zn²⁺

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