JEE Main 2021 (Online) 20th July Evening Shift | Salt Analysis Question 29 | Chemistry

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JEE Main 2021 (Online) 20th July Evening Shift

MCQ (Single Correct Answer)

-1

Cu²⁺ salt reacts with potassium iodide to give

Cu₂I₂

Cu₂I₃

Cul

Cu(I₃)₂

JEE Main 2021 (Online) 25th February Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements :

Statement I : The identification of Ni²⁺ is carried out by dimethyl glyoxime in the presence of NH₄OH.

Statement II : The dimethyl glyoxime is a bidentate neutral ligand.

In the light of the above statements, choose the correct answer from the options given below :

Statement I is false but Statement II is true.

Statement I is true but Statement II is false.

Both Statement I and Statement II are false.

Both Statement I and Statement II are true.

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.

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