The pair of compound which cannot exist together in solution is
NaHCO3 and NaOH
NaHCO3 and H2O
NaHCO3 and Na2CO3
Na2CO3 and NaOH
Would gaseous HCl be considered as an Arrhenius acid ?
Yes
No
Not known
Gaseous HCl does not exist
The degree of hydrolysis in hydrolytic equilibrium
A- + H2O HZ + OH-
at salt concentration of 0.001 M is :
(Ka = 1 × 10-5)
1 × 10-3
1 × 10-4
5 × 10-4
1 × 10-6
The reaction quotient 'Q' is useful in predicting the direction of the reaction. Which of the following is incorrect?
If Qc < Kc, the forward reaction is favoured
If Qc > Kc, the forward reaction is favoured
If Qc >Kc, the forward reaction is favoured and Qc =Kc, no reaction occur.
None of these
Equivalent weight of an acid :
depends on the reaction involved
depends upon the number of oxygen atoms present
is always constant
None of the above
Two moles of PCl5 were heated in a closed vessel of 2 L. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl3. The value of equilibrium constant is :
0.53
0.267
2.63
5.3
The solubility product of Barium sulphate is 1.5 × 10-9 at 18°C. Its solubility in water at 18°C is :
1.5 × 10-9
1.5 × 10-5
3.9 × 10-9
3.9 × 10-5