1
JEE Main 2021 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
A solution is 0.1 M in Cl$$-$$ and 0.001 M in CrO$$_4^{2 - }$$. Solid AgNO3 is gradually added to it. Assuming that the addition does not change in volume and Ksp(AgCl) = 1.7 $$\times$$ 10$$-$$10 M2 and Ksp(Ag2CrO4) = 1.9 $$\times$$ 10$$-$$12 M3.

Select correct statement from the following :
A
AgCl precipitates first because its Ksp is high.
B
Ag2CrO4 precipitates first as its Ksp is low.
C
Ag2CrO4 precipitates first because the amount of Ag+ needed is low.
D
AgCl will precipitate first as the amount of Ag+ needed to precipitate is low.
2
JEE Main 2021 (Online) 18th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Given below are two statements : One is labelled as Assertion A and the other labelled as reason R

Assertion A : During the boiling of water having temporary hardness, Mg(HCO3)2 is converted to MgCO3.

Reason R : The solubility product of Mg(OH)2 is greater than that of MgCO3.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
Both A and R are true but R is not the correct explanation of A
B
A is true but R is false
C
Both A and R are true and R is the correct explanation of A
D
A is false but R is true
3
JEE Main 2021 (Online) 17th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Which of the following compound CANNOT act as a Lewis base?
A
SF4
B
NF3
C
ClF3
D
PCl5
4
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-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]
A
1.11 $$\times$$ 10$$-$$6
B
1.11 $$\times$$ 10$$-$$2
C
1.77 $$\times$$ 10$$-$$6
D
1.77 $$\times$$ 10$$-$$2
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