1
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
100 mL of 0.1 M HCl is taken in a beaker and to it 100 mL of 0.1 M NaOH is added in steps of 2 mL and the pH is continuously measured. Which of the following graphs correctly depicts the change in pH?
A
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Ionic Equilibrium Question 56 English Option 1
B
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Ionic Equilibrium Question 56 English Option 2
C
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Ionic Equilibrium Question 56 English Option 3
D
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Ionic Equilibrium Question 56 English Option 4
2
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An acidic buffer is obtained on mixing :
A
100 mL of 0.1 M HCl and 200 mL of 0.1 M CH3COONa
B
100 mL of 0.1 M HCl and 200 mL of 0.1 M NaCl
C
100 mL of 0.1 M CH3COOH and 100 mL of 0.1 M NaOH
D
100 mL of 0.1 M CH3COOH and 200 mL of 0.1 M NaOH
3
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For the following Assertion and Reason, the correct option is

Assertion (A): When Cu (II) and sulphide ions are mixed, they react together extremely quickly to give a solid.

Reason (R): The equilibrium constant of
Cu2+(aq) + S2–(aq) ⇌ CuS(s) is high because the solubility product is low.
A
(A) is false and (R) is true.
B
Both (A) and (R) are true but (R) is not the explanation for (A).
C
Both (A) and (R) are true and (R) is the explanation for (A).
D
Both (A) and (R) are false.
4
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The solubility product of Cr(OH)3 at 298 K is 6.0 × 10–31. The concentration of hydroxide ions in a saturated solution of Cr(OH)3 will be :
A
(2.22 × 10–31)1/4
B
(4.86 × 10–29)1/4
C
(18 × 10–31)1/4
D
(18 × 10–31)1/2
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