1
JEE Main 2021 (Online) 26th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following is 'a' FALSE statement ?
A
Carius method is used for the estimation of nitrogen in an organic compound.
B
Kjeldahl's method is used for the estimation of nitrogen in an organic compound.
C
Carius tube is used in the estimation of sulphur in an organic compound.
D
Phosphoric acid produced on oxidation of phosphorus present in an organic compound is precipitated as Mg2P2O7 by adding magnesia mixture.
2
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
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 :
A
Statement I is false but Statement II is true.
B
Statement I is true but Statement II is false.
C
Both Statement I and Statement II are false.
D
Both Statement I and Statement II are true.
3
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?
A
Nitric acid
B
Sodium hydroxide
C
Ammonia
D
Hydrochloric acid
4
JEE Main 2020 (Online) 6th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
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
A
(i)-(b), (ii)-(d), (iii)-(e), (iv)-(a)
B
(i)-(d), (ii)-(c), (iii)-(e), (iv)-(a)
C
(i)-(b), (ii)-(a), (iii)-(c), (iv)-(d)
D
(i)-(d), (ii)-(c), (iii)-(b), (iv)-(e)
JEE Main Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12