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1
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Match List - I with List - II :

List - I
Test/Reagents/Observation(s)
List - II
Species detected
(a) Lassaigne's Test (i) Carbon
(b) Cu(II) oxide (ii) Sulphur
(c) Silver nitrate (iii) N, S, P, and halogen
(d) The sodium fusion extract
gives black precipitate with
acetic acid and lead acetate
(iv) Halogen Specifically


The correct match is :
A
(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
B
(a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)
C
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
D
(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
2
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Which of the following is least basic?
A
$${(C{H_3}CO)_2}\mathop N\limits^{..} H$$
B
$$(C{H_3}CO)\mathop N\limits^{..} H{C_2}{H_5}$$
C
$${({C_2}{H_5})_3}\mathop N\limits^{..} $$
D
$${({C_2}{H_5})_2}\mathop N\limits^{..} H$$
3
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Among the following, the aromatic compounds are :

JEE Main 2021 (Online) 16th March Morning Shift Chemistry - Basics of Organic Chemistry Question 51 English
Choose the correct answer from the following options :
A
(B), (C) and (D) only
B
(B) and (C) only
C
(A), (B) and (C) only
D
(A) and (B) only
4
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
In $$\mathop C\limits^1 {H_2} = \mathop C\limits^2 = \mathop C\limits^3 H - \mathop C\limits^4 {H_3}$$ molecule, the hybridization of carbon 1, 2, 3 and 4 respectively, are :
A
sp2, sp, sp2, sp3
B
sp2, sp2, sp2, sp3
C
sp3, sp, sp3, sp3
D
sp2, sp3, sp2, sp3
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