1
JEE Main 2019 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The pH of rain water, is approximately :
A
5.6
B
7.5
C
7.0
D
6.5
2
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
20 mL of 0.1 M H2SO4 solution is added to 30 mL of of 0.2 M NH4OH solution. The pH of the resultant mixture is : [pkb of NH4OH = 4.7].
A
5.2
B
9.0
C
5.0
D
9.4
3
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
An aqueous solution contains 0.10 M H2S and 0.20 M HCl. If the equilibrium constants for the formation of HS from H2S is 1.0 $$\times$$ 10–7 and that of S2- from HS ions is 1.2 $$\times$$ 10–13 then the concentration of S2- ions in aqueous solution is :
A
5 $$\times$$ 10–19
B
5 $$\times$$ 10–8
C
3 $$\times$$ 10–20
D
6 $$\times$$ 10–21
4
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?
A
Base Acid End point
Weak Strong Colourless to pink
B
Base Acid End point
Strong Strong Pinkish red to yellow
C
Base Acid End point
Weak Strong Yellow to pinkish red
D
Base Acid End point
Strong Strong Pink to colourless
JEE Main Subjects
EXAM MAP