1
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
At 25°C, the solubility product of Mg(OH)2 is 1.0 $$\times$$ 10–11. At which pH, will Mg2+ ions start precipitating in the form of Mg(OH)2 from a solution of 0.001 M Mg2+ ions?
A
9
B
10
C
11
D
8
2
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
Solubility product of silver bromide is 5.0 $$\times$$ 10–13. The quantity of potassium bromide (molar mass taken as 120g of mol–1) to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is :
A
1.2 $$\times$$ 10–10 g
B
1.2 $$\times$$ 10–9 g
C
6.2 $$\times$$ 10–5 g
D
5.0 $$\times$$ 10–8 g
3
AIEEE 2009
MCQ (Single Correct Answer)
+4
-1
Solid Ba(NO3)2 is gradually dissolved in a 1.0 $$\times$$ 10-4 M Na2CO3 solution. At what concentration of Ba2+ will a precipitate begin to form ?
(Ksp for BaCO3 = 5.1 $$\times$$ 10−9 )
A
5.1 $$\times$$ 10-5 M
B
8.1 $$\times$$ 10-8 M
C
8.1 $$\times$$ 10-7 M
D
4.1 $$\times$$ 10-5 M
4
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
Four species are listed below
i. $$HCO_3^−$$
ii. $$H_3O^+$$
iii. $$HSO_4^−$$
iv. $$HSO_3F$$
Which one of the following is the correct sequence of their acid strength?
A
iv < ii < iii < I
B
ii < iii < i < iv
C
i < iii < ii < iv
D
iii < i < iv < ii
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