Which of the following statements about pH and H+ ion concentration is correct ?
Addition of one drop of concentrated HCI in NH4OH solution decreases pH of the solution
A solution of the mixture of one equivalent of each of CH3COOH and NaOH has a pH of 7
pH of pure neutral water is not zero
A cold and conc H2SO4 has lower H+ ion concentration than a dilute solution of H2SO4
Which of the following is most soluble ?
Bi2S3 (Ksp = 1 × 10-70 )
MnS (Ksp = 7 × 10-16 )
CuS (Ksp = 8 × 10-37 )
Ag2S (Ksp = 6 × 10-51 )
Solubility of a M2 S type salt is 3.5 × 10-6 , then find out its solubility product.
1.7 × 10-6
1.7 × 10-16
1.7 × 10-18
1.7 × 10-12
What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH1 ), sodium sulphide (pH2 ), sodium selenide (pH3) and sodium telluride (pH4) ?
pH1 > pH2 pH3 > pH4
pH1 < pH2 < pH3 < pH4
pH1 < pH2 < pH3 pH4
pH1 > pH2 > pH3 > pH4
The ionisation constant of ammonium hydroxide is 1.77 × 10-5 at 298 K. Hydrolysis constant of ammonium chloride is
5.65 × 10-10
6.50 × 10-12
5.65 × 10-13
5.65 × 10-12
The strongest conjugate base is
CI-
CH3COO-
Equal volumes of three acid solutions of pH 3,4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture ?
1.11 × 10-4 M
3.7 × 10-4 M
3.7 × 10-3 M
1.11 × 10-3 M
Which of the following pairs constitutes a buffer ?
HNO2 and NaNO2
NaOH and NaCI
HNO3 and NH4NO3
HCI and KCI
Aqueous solution of acetic acid contains
CH3COO- and H+
CH3COO- , H3 O+ and CH3COOH
CH3COO-, H3O+ and H+
CH3COOH, CH3COO- and H+
Solubility of a MX2 type electrolytes is 0.5 × 10-4 mol/L, then find out Ksp of electrolytes.
5 × 10-12
25 × 10-10
1 × 10-13
5 × 10-13
