1
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The solubility of AgCN in a buffer solution of pH = 3 is x. The value of x is : [Assume : No cyano complex is formed; Ksp(AgCN) = 2.2 $$\times$$ 10$$-$$16 and Ka(HCN) = 6.2 $$\times$$ 10$$-$$10]
A
1.9 $$\times$$ 10$$-$$5
B
1.6 $$\times$$ 10$$-$$6
C
2.2 $$\times$$ 10$$-$$16
D
0.625 $$\times$$ 10$$-$$6
2
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following reactions will not form acetaldehyde?
A
$$C{H_3}C{H_2}OH\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{573K}^{Cu}} $$
B
$$C{H_3}C{H_2}OH\buildrel {Cr{O_3} - {H_2}S{O_4}} \over \longrightarrow $$
C
$$C{H_2} = C{H_2} + {O_2}\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{{H_2}O}^{Pd(II)/Cu(II)}} $$
D
$$C{H_3}CN\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{ii)\,{H_2}O}^{i)\,DIBAL - H}} $$
3
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The plots of radial distribution functions for various orbitals of hydrogen atom against 'r' are given below :

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Structure of Atom Question 90 English
The correct plot for 3s orbital is :
A
(B)
B
(A)
C
(C)
D
(D)
4
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify A in the given chemical reaction.

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Hydrocarbons Question 64 English
A
JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Hydrocarbons Question 64 English Option 1
B
JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Hydrocarbons Question 64 English Option 2
C
JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Hydrocarbons Question 64 English Option 3
D
JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Hydrocarbons Question 64 English Option 4
JEE Main Papers
2023
2021
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12