PCl(g) PCl(g) + Cl(g) if the degree of the
dissociation is at equilibrium pressure P, then
the equilibrium constant for the reaction
1.
2.
3.
4.
Inert gas has been added to the following
equilibrium system at constant volume
To which direction will the equilibrium shift ?
1. Forward
2. Backward
3. No effect
4. Unpredictable
The decomposition of to is carried out at C in chloroform. When equilibrium is reached, 0.2 mol of and mol of are present in a 2L solution. The equilibrium constant for the reaction is
1.
2.
3.
4.
For , 1 mol and 3 mol are at 4 atm. Equilibrium pressure is found to be 3 atm. Hence,
is
1.
2.
3.
4. None of these
The pH of 0.1 M solution of the following salts
increases in the order
1. NaCl < NHCl < NaCN < HCl
2. HCl < NHCl < NaCl < NaCN
3. NaCN < NHCl < NaCl < HCl
4. HCl < NaCl < NaCN < NHCl
The degree of hydrolysis in hydrolytic equilibrum
at salt concentration of
0.001 M is (K= 1 × 10)
1.
2.
3.
4.
Henderson’s equation is pH = pK + log. If
the acid gets half neutralized the value of pH will
be : (pK= 4.30)
1. 4.3
2. 2.15
3. 8.60
4. 7
The pH of a 0.01 M solution of acetic acid having
degree of dissociation 12.5% is
1. 5.623
2. 2.903
3. 3.723
4. 4.509
Which of the following solutions will have close
to pH = 1
1. 100 ml of HCI + 100 ml of NaOH
2. 55 ml of HCI + 45 ml of NaOH
3. 10 ml of HCI + 90 ml of NaOH
4. 75 ml of HCI + 25 ml of NaOH
In which of the following solvents will AgBr have
the highest solubility
1. 10 M NaBr
2. 10 M NHOH
3. Pure water
4. 10 M HBr
The solubility product of CuS, AgS, HgS are 10, 10, 10 respectively. The solubilities of these sulphides are in the order
1. AgS > CuS > HgS
2. AgS > HgS > CuS
3. HgS > AgS > CuS
4. CuS > AgS > HgS
The solubility product constant K of Mg(OH) is 9.0 × 10. If a solution is 0.010 M with respect to Mg ion, what is the maximum hydroxide ion concentration which could be present without causing the precipitation of Mg(OH)
1. 1.5 x 10 M
2. 3.0 x 10 M
3. 1.5 x 10 M
4. 3.0 x 10 M
How many grams of CaCO (molecular weight = 128) on dissolving in distilled water will give a saturated solution
[K(CaCO) = 2.5×10 moll]
1. 0.0064 g
2. 0.1280 g
3. 0.0128 g
4. 1.2800 g
Which may be added to one litre of water to act
as a buffer
1. One mole of HCHO and 0.5 mole of NaOH
2. One mole of NHCl and one mole of HCl
3. One mole of NHOH and one mole of NaOH
4. One mole of HCHO and one mole of HCl
A solution of weak acid HA containing 0.01 moles
of acid per litre of solutions has pH = 4. The
percentage degree of ionisation of the acid and
the ionisation constant of acid are respectively
1. 1%, 10
2. 0.01%, 10
3. 1%, 10
4. 0.01%, 10