1
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The major product of the following chemical reaction is :

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 155 English
A
$$C{H_3}C{H_2}CHO$$
B
$$C{H_3}C{H_2}C{H_3}$$
C
$$C{H_3}C{H_2}C{H_2}OH$$
D
$${(C{H_3}C{H_2}CO)_2}O$$
2
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In which of the following pairs, the outer most electronic configuration will be the same?
A
Cr+ and Mn2+
B
Ni2+ and Cu+
C
V2+ and Cr+
D
Fe2+ and Co+
3
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following reaction/s will not give p-aminoazobenzene?

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Compounds Containing Nitrogen Question 157 English
A
C only
B
A only
C
A and B
D
B only
4
JEE Main 2021 (Online) 25th February Morning Shift
Numerical
+4
-1
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Using the provided information in the following paper chromatogram :

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Basics of Organic Chemistry Question 176 English
Fig : Paper chromatography for compounds A and B.

the calculated Rf value of A ________$$\times$$ 10-1.
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