1
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify A and B in the chemical reaction.

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 75 English
A
JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 75 English Option 1
B
JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 75 English Option 2
C
JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 75 English Option 3
D
JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 75 English Option 4
2
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the glycosidic linkage between galactose and glucose is present in lactose?
A
C-1 of galactose and C-6 of glucose
B
C-1 of glucose and C-6 of galactose
C
C-1 of galactose and C-4 of glucose
D
C-1 of glucose and C-4 of galactose
3
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
According to molecular orbital theory, the species among the following that does not exist is :
A
$${O_2}^{2 - }$$
B
$$B{e_2}$$
C
$$H{e_2}^ - $$
D
$$H{e_2}^ + $$
4
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Complete combustion of 1.80 g of an oxygen containing compound (CxHyOz) gave 2.64 g of CO2 and 1.08 g of H2O. The percentage of oxygen in the organic compound is :
A
51.63
B
50.33
C
63.53
D
53.33
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