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 115 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
Out of Syllabus
Change Language
Math List - I with List - II.

List I (Metal) List II (Ores)
(a) Aluminium (i) Siderite
(b) Iron (ii) Calamine
(c) Copper (iii) Kaolinite
(d) Zinc (iv) Malachite


Choose the correct answer from the options given below :
A
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
B
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
C
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
D
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
3
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
4
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)
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