JEE Main 2021 (Online) 25th February Evening Shift | JEE Main Year Wise Previous Years Questions

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MCQ (Single Correct Answer)

-1

The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is :

$$C{H_3}COCl/AlC{l_3},B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$$

$$C{H_3}COCl/AlC{l_3},Zn - Hg/HCl,B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4}$$

$$B{r_2}/AlB{r_3},C{H_3}COCl/AlC{l_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$$

$$HN{O_3}/{H_2}S{O_4},B{r_2}/AlC{l_3},C{H_3}COCl/AlC{l_3},Zn - Hg/HCl$$

JEE Main 2021 (Online) 25th February Evening Shift

MCQ (Single Correct Answer)

-1

What is 'X' in the given reaction?

JEE Main 2021 (Online) 25th February Evening Shift Chemistry - Alcohols, Phenols and Ethers Question 109 English

JEE Main 2021 (Online) 25th February Evening Shift Chemistry - Alcohols, Phenols and Ethers Question 109 English Option 1

JEE Main 2021 (Online) 25th February Evening Shift Chemistry - Alcohols, Phenols and Ethers Question 109 English Option 2

JEE Main 2021 (Online) 25th February Evening Shift

MCQ (Single Correct Answer)

-1

The solubility of Ca(OH)₂ in water is :

[Given : The solubility product of Ca(OH)₂ in water = 5.5 $$\times$$ 10^$$-$$6]

1.11 $$\times$$ 10^$$-$$6

1.11 $$\times$$ 10^$$-$$2

1.77 $$\times$$ 10^$$-$$6

1.77 $$\times$$ 10^$$-$$2

JEE Main 2021 (Online) 25th February Evening Shift

MCQ (Single Correct Answer)

-1

Which among the following species has unequal bond lengths?

XeF₄

BF$$_4^ - $$

SiF₄

SF₄

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