The dissociation equilibrium of a gas AB2 can be represented as : 2AB2(g) 2AB(g) +B2(g) The degree of dissociation is 'x' and is small compared to 1.The expression relating the degree of dissociation (x) with equilibrium constant Kp and total pressure p is _______ .
(2Kp/ p)
(2Kp / p)1/3
(2Kp / p)1/2
(Kp / p)
What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH1) and 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
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 M2S 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
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
0.1 M solution of which one of these substances will be basic ?
Sodium borate
Calcium nitrate
NH4Cl
Sodium sulphate
The solubility product of AgI at 250C is 1.0 ×10-16 mol2L-2.The solubility of AgI in 10-4 N solution of KI at 250C is approximately (in mol L-1)
1.0 ×10-10
1.0 ×10-8
1.0 ×10-16
1.0 ×10-12
H2S gas when passed through a solution of cations containing HCl precipitates the cations of second group in qualitative analysis but not those belonging to the fourth group. It is because
Presence of HCl decreases the sulphide ion concentration.
Presence of HCl increases the sulphide ion concentration.
Solubility product of group 2nd sulphides is more than that of group iv silphides
Sulphides of group iv cations are unstable in HCl
Which of the following pairs constitutes a buffer ?
HNO2 and NaNO2
NaOH and NaCl
HNO3 and NH4NO3
HCl and KCl
Aqueous solution of acetic acid contains-
CH3COO- and H+
CH3COO-, H3O+ and CH3COOH
CH3COO-, H3O+ and H+
CH3 COOH, CH3COO- and H+
