1
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
Which of the following mixtures will have the lowest pH at 298 K?
A
10 mL 0.05 N CH3COOH + 5 mL 0.1 N NH4OH
B
5 mL 0.2 N NH4Cl + 5 mL 0.2 N NH4OH
C
5 mL 0.1 N CH3COOH + 10 mL 0.05 N CH3COONa
D
5 mL 0.1 N CH3COOH + 5 mL 0.1 N NaOH
2
WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Dissolving NaCN in de-ionised water will result in a solution having
A
pH < 7
B
pH = 7
C
pOH = 7
D
pH > 7
3
WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
Change Language
PbCl2 is insoluble in cold water. Addition of HCl increases its solubility due to
A
formation of soluble complex anions like [PbCl3]$$-$$
B
oxidation of Pb(II) to Pb(IV)
C
formation of [Pb(H2O)6]2+
D
formation of polymeric lead complexes
4
WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Of the following compounds, which one of the strongest Bronsted acid in a aqueous solution?
A
HClO3
B
HClO2
C
HOCl
D
HOBr
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