1
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.
2
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
3
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)
4
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If you spill a chemical toilet cleaning liquid on your hand, your first aid would be
A
aqueous NaOH
B
aqueous NaHCO3
C
aqueous NH3
D
vinegar
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