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1

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

+4

-1

Identify A and B in the chemical reaction.

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 86 English

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 86 English

A

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 86 English Option 1

B

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 86 English Option 2

C

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 86 English Option 3

D

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 86 English Option 4

2

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

+4

-1

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

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

Complete combustion of 1.80 g of an oxygen containing compound (C_xH_yO_z) 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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