CBSE
Which of the following is strongest Bronsted base?
ClO-
ClO2-
ClO3-
ClO4-
The pH of aqueous solution ofammonium formate is (pKa of HCOOH = 3.8 and pKb of NH3= 4.8)
7
6.0
6.5
8.9
Among the following the strongest acid is
CH3COOH
C6H5COOH
m-CH3OC6H4COOH
p-CH3OC6H4COOH
The pH value of decinormal solution of NH4OH which is 20% ionised is
12.95
12.30
14.70
13.30
Consider the following salts : NaCl, HgCl2, Hg2Cl2, CuCl2, CuCl and AgCl. Identify the correct set of insoluble salts in water.
Hg2Cl2, CuCl, AgCl
Hg2Cl, CuCl, AgCl
Hg2Cl2, CuCl2, AgCl
Hg2Cl2, CuCl, NaCl
For the reaction,
2SO2 (g) + O2 (g) 2SO3 (g) at 300 K, the value of G° is -690.9 R. The equilibrium constant value for the reaction at that temperature is (R is gas constant)
10 atm-1
10 atm
10
1
When the temperature of reactions will increase then the effect on pH value will
increase
decrease
first increases then decreases
remains same.
In which of the following acid-base titration, pH is greater than 8 at equivalence point?
Acetic acid versus ammonia
Acetic acid versus sodium hydroxide
Hydrochloric acid versus ammonia
Hydrochloric acid versus sodium hydroxide
Among the following the weakest base is
C6H5CH2NH2
C6H5CH2NHCH3
O2NCH2NH2
CH3NHCHO
What is the pH of 0.01 M glycine solution? For glycine ?
3
10
6.1
7.2