60 ml 1M CH₃COOH is mixed with 20 ml 1 M NaOH then pH of resulting solution will be

(K_a = 1.8 X 10^-5, log1.8 = 0.25)

1. 8.55

2. 4.95

3. 4.45

4. 7.45

In which solvent, solubility of AgCl is maximum ?

1. 0.01 M NaCl

2. Pure Water

3. 0.01 M NH₄OH

4. 0.05 M AgNO₃

$\frac{{\mathrm{K}}_{\mathrm{p}}}{{\mathrm{K}}_{\mathrm{c}}}$ for the gaseous reaction:

$\mathrm{I}. 2\mathrm{A} + 3\mathrm{B} \rightleftharpoons 2\mathrm{C}$
$\mathrm{II}. 2\mathrm{A}\rightleftharpoons 4\mathrm{B}$
$\mathrm{III}. \mathrm{A}+\mathrm{B}+2\mathrm{C} \rightleftharpoons 4\mathrm{D}$

Would be respectively:

1. (RT)^-3, (RT)², (RT)⁰ 

2. (RT)^-3, (RT)-², (RT)^-1 

3. (RT)^-3, (RT)², (RT) 

4. None of the above

N₂O₄ dissociates as ${\mathrm{N}}_2{\mathrm{O}}_4\left(\mathrm{g}\right)\rightleftharpoons 2{\mathrm{NO}}_2\left(\mathrm{g}\right)$ at 273 K and 2 atm pressure. The equilibrium mixture has a vapour density of 41. What will be the percentage degree of dissociation ?

1. 14.2%

2. 16.2%

3. 12.2%

4. 87.8%

Inert gas is added to the equilibrium ${\mathrm{PCl}}_5(\mathrm{g}) \rightleftharpoons {\mathrm{PCl}}_3(\mathrm{g})$ $+$ ${\mathrm{Cl}}_2\left(\mathrm{g}\right)$ at constant pressure. The degree of dissociation will :

1. Remain unchanged

2. Decrease

3. Increase

4. Decrease or increase but cannot be predicted with certainty

Dissociation of phosphorus pentachloride is favoured by:

1. High temperature and high pressure

2. High temperature and low pressure

3. Low temperature and low pressure

4. Low temperature and high pressure

1. I,II

2. II,III

3. I,III

4. I,II,III

The stability product constant K_sp of Mg(OH)₂ is 9.0 X 10^-12. If a solution is 0.010 M with respect to Mg²⁺ ion, what is the maximum hydroxide ion concentration which could be present without causing the precipitation of Mg(OH)₂ ?

1. 1.5 X 10^-7 M

2. 3.0 X 10^-7 M

3. 1.5 X 10^-5 M

4. 3.0 X 10^-5 M

The amount of CaC₂O₄ (molecular weight =128) will dissolve in distilled water to make 1 liter of a saturated solution is: 

[K_sp (CaC₂O₄) = 2.5 x 10^-9 ]

1. 0.0064 g             
2. 0.1280 g
3. 0.0128 g           
4. 1.2800 g

What substance could be added to one liter of water to serve as a buffer?

1. One mole of ${\mathrm{CH}}_3{\mathrm{CO}}_2\mathrm{H}$ and 0.5 moles of NaOH

2. One mole of NH₄Cl and one mole of HCl

3. One mole of NH₄OH and one mole of NaOH

4. One mole of ${\mathrm{CH}}_3{\mathrm{CO}}_2\mathrm{H}$ and one mole of HCl