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1
JEE Main 2021 (Online) 20th July Evening Shift
+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) 17th March Morning Shift
+4
-1
Which of the following compound CANNOT act as a Lewis base?
A
SF4
B
NF3
C
ClF3
D
PCl5
3
JEE Main 2021 (Online) 25th February Evening Shift
+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
4
JEE Main 2021 (Online) 25th February Morning Slot
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]
1.9 $$\times$$ 10$$-$$5
1.6 $$\times$$ 10$$-$$6
2.2 $$\times$$ 10$$-$$16
0.625 $$\times$$ 10$$-$$6