The pH of a 0.02 M NH4Cl solution will be :
[given Kb (NH4OH) = 10–5
and log 2 = 0.301]
A
2.56
B
5.35
C
4.35
D
4.65
2
JEE Main 2019 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Consider the following statements
(a) The pH of a mixture containing 400 mL of 0.1 M H2SO4 and 400 mL of 0.1 M NaOH will be approximately 1.3
(b) Ionic product of water is temperature dependent.
(c) A monobasic acid with Ka = 10–5
has pH = 5. The degree of dissociation of this acid is 50 %.
(d) The Le Chatelier's principle is not applicable to common-ion effect.
The correct statements are :
A
(a) and (b)
B
(a), (b) and (c)
C
(a), (b) and (d)
D
(b) and (c)
3
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
In an acid-base titration, 0.1 M HCl solution
was added to the NaOH solution of unknown
strength. Which of the following correctly
shows the change of pH of the titraction
mixture in this experiment?
A
(C)
B
(A)
C
(B)
D
(D)
4
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
If solublity product of Zr3(PO4)4 is denoted by Ksp and its molar solubility is denoted by S, then
which of the following relation between S and Ksp is correct ?
