The Strongest conjugate base is______________
NO3-
Cl-
SO4 2-
CH3COO-
Which of the following statements about pH and H+ ion concentration is incorrect ?
addition of one drop of concentrated HCl in NH4OH solution decreases pH of the solution.
A solution of the mixture of one equivalent of each CH3COOH and NaOH has a pH of 7 .
pH of pure neutral water is not zero .
A cold and con.H2SO4 has lower H+ ion concentration than a diluted solution of H2SO4
Calculate the pOH of a solution at 250C that contains 1.0×10-6 M of hydronium ions .
7.00
4.00
9.00
1.00
The conjugate acid of NH2- is_________________
N2H4
NH4 +
NH2 OH
NH3
The compound whose aqueous solution has the highest pH is______________
NaCl
NaHCO3
Na2CO3
NH4 Cl
In which one of the following the solubility of AgCl will be minimum ?
0.1 m NaNO3
Water
0.1 m NaCl
0.1 m NaBr
The pH value of 10 m solution of HCl is_____________
less than 0
Equal to 0
Equal to 1
Equal to 2
The pH value of blood does not change appreciably by a small addition of an acid or base ,because the blood
is a body fluid
can be easily coagulated
contains iron as a part of the molecule
contains serum protein that acts as buffer
Aqueous solution of acetic acid contains___________
CH3COO- and H+
CH3COO-, H3O+ and CH3COOH
CH3COO-, H3O+ and H+
CH3 COOH, CH3COO- and H+H3COOH
The solubility product of CuS ,CdS and HgS are 10-31 , 10-44 , 10-54 , respectively.The solubility of these sulphides are in the order .
CdS > HgS > CuS
HgS > CdS > CuS
CdS > CuS > HgS
CuS > CdS >HgS
