1
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
JEE Main 2021 (Online) 24th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 131 English
Which of the following reagent is suitable for the preparation of the product in the above reaction?
A
Red P + Cl2
B
$$N{H_2} - N{H_2}/{C_2}{H_5}\mathop O\limits^\Theta \mathop N\limits^ \oplus a$$
C
NaBH4
D
Ni/H2
2
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
What is the correct order of the following elements with respect to their density?
A
Cr < Zn < Co < Cu < Fe
B
Cr < Fe < Co < Cu < Zn
C
Zn < Cr < Fe < Co < Cu
D
Zn < Cu < Co < Fe < Cr
3
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Match List - I and List - II.

List I List II
(a) Valium (i) Antifertility drug
(b) Morphine (ii) Pernicious anaemia
(c) Norethindrone (iii) Analgesic
(d) Vitamin $${B_{12}}$$ (iv) Tranquilizer
A
(a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
B
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
C
(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
D
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
4
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct shape and $$I - I - I$$ bond angles respectively in $$I_3^ - $$ ion are :
A
Linear; 180$$^\circ$$
B
T-shaped; 180$$^\circ$$ and 90$$^\circ$$
C
Trigonal planar; 120$$^\circ$$
D
Distorted trigonal planar; 135$$^\circ$$ and 90$$^\circ$$
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