1
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following is not a correct method of the preparation of benzylamine from cyanobenzene ?
A
(i) SnCl2 + HCl(gas)          (ii) NaBH4
B
H2/Ni
C
(i) LiAlH4                           (ii) H3O+
D
(i) HCl/H2O                        (ii) NaBH4
2
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The major product obtained in the given reaction is : JEE Main 2019 (Online) 10th April Evening Slot Chemistry - Haloalkanes and Haloarenes Question 146 English
A
JEE Main 2019 (Online) 10th April Evening Slot Chemistry - Haloalkanes and Haloarenes Question 146 English Option 1
B
JEE Main 2019 (Online) 10th April Evening Slot Chemistry - Haloalkanes and Haloarenes Question 146 English Option 2
C
JEE Main 2019 (Online) 10th April Evening Slot Chemistry - Haloalkanes and Haloarenes Question 146 English Option 3
D
JEE Main 2019 (Online) 10th April Evening Slot Chemistry - Haloalkanes and Haloarenes Question 146 English Option 4
3
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Let a1, a2, a3,......be an A.P. with a6 = 2. Then the common difference of this A.P., which maximises the product a1a4a5, is :
A
$${3 \over 2}$$
B
$${6 \over 5}$$
C
$${8 \over 5}$$
D
$${2 \over 3}$$
4
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Suppose that 20 pillars of the same height have been erected along the boundary of a circular stadium. If the top of each pillar has been connected by beams with the top of all its non-adjacent pillars, then the total number of beams is :
A
180
B
210
C
170
D
190

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