The compound whose aqueous solution has the highest pH is
NaCl
NaHCO3
Na2CO3
NH4 Cl
Which has highest pH ?
CH3COOK
NH4Cl
NaNO3
Aqueous solution of acetic acid contains-
CH3COO- and H+
CH3COO-, H3O+ and CH3COOH
CH3COO-, H3O+ and H+
CH3 COOH, CH3COO- and H+
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
The pH value of a 10 m solution of HCl is
less than 0
Equal to 0
Equal to 1
Equal to 2
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
The hydride ion H- is strong base than its hydroxide ion OH-. Which of the following reactions will occur if sodium hydride (NaH) is dissolved in Water ?
2H-(aq) + H2O(l)→H2O+H2 +2e-
H-(aq) + H2O(l)→OH-+H2
H - + H2O(l) → no reaction
None of the above
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)
Ionisation constant of CH3COOH is 1.7×10-5 and concentration of H+ ions is 3.4×10-4. Then, find out initial concentration of CH3COOH molecules.
3.4 × 10-4
3.4 × 10-3
6.8 × 10-4
6.8 × 10-3
