In which of the following case reaction goes farthest to completion?

(1) K=10³                                         

(2) K=10^-2

(3) K=10                                           

(4) K=10⁰

For the reversible reaction,

N₂ (g) + 3H₂(g) $\rightleftharpoons$2NH₃ (g) + heat

 the equilibrium shifts in forward direction                                   

(1) by increasing the concentration of NH₃ (g) 

(2) by decreasing the pressure

(3) by decreasing the concentrations of N₂ (g)and H₂(g)

(4) by increasing pressure and decreassing temperature

Which is the strongest acid in the following?          

(a) H₂SO₄            (b) HClO₃        (c) HClO₄         (d) H₂SO₃ 

The conjugate acid of NH₂^- is                           

(a) N₂H₄      (b) N${\mathrm{H}}_4^{+}$       (c) NH₄OH        (d) NH₃

A 50 ml solution of strong acid of pH = 1 is mixed with a 50 ml solution of strong acid of pH=2. The pH of the mixture will be nearly:                                                     

(log 5.5 = 0.74)

1. 0.74                   2. 1.26

3. 1.76                   4.  1.5

The pH of a solution obtained by mixing 50ml of 0.4N HCl and 50ml of 0.2M NaOH is:

(1) 13

(2) 12

(3) 1.0

(4) 2.0

In which of the following reaction the value of K_p will be equal to K_c ?

$1.<mspace\; width="1em"></mspace>{\mathrm{N}}_2\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{O}}_2\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>\rightleftharpoons 2\mathrm{NO}\left(\mathrm{g}\right)$

$2.<mspace\; width="1em"></mspace>{\mathrm{PCl}}_5\left(\mathrm{g}\right)\rightleftharpoons {\mathrm{PCl}}_3\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{Cl}}_2\left(\mathrm{g}\right)$

$3.<mspace\; width="1em"></mspace>2{\mathrm{NH}}_3\left(\mathrm{g}\right)\rightleftharpoons {\mathrm{N}}_2\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>+3{\mathrm{H}}_2\left(\mathrm{g}\right)$

$4.<mspace\; width="1em"></mspace>2{\mathrm{SO}}_2\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{O}}_2\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>\rightleftharpoons 2{\mathrm{SO}}_3\left(\mathrm{g}\right)$

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

$$\begin{gathered} \mathrm{I}.<mspace\; width="1em"></mspace>2\mathrm{A}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>3\mathrm{B}<mspace\; width="1em"></mspace>\rightleftharpoons 2\mathrm{C} \\ \mathrm{II}.<mspace\; width="1em"></mspace>2\mathrm{A}\rightleftharpoons 4\mathrm{B} \\ \mathrm{III}.<mspace\; width="1em"></mspace>\mathrm{A}+\mathrm{B}+2\mathrm{C}<mspace\; width="1em"></mspace>\rightleftharpoons 4\mathrm{D} \end{gathered}$$

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

How many grams of CaC₂O₄ (molecular weight =128) on dissolving in distilled water will give a saturated solution

[K_sp (CaC₂O₄) = 2.5x10^-9 mol²l^-2

1. 0.0064 g             2. 0.1280 g

3. 0.0128 g             4. 1.2800 g

Ostwald dilution law for weak electrolyte HA can be given as

$\left(1\right)<mspace\; width="1em"></mspace>{\mathrm{K}}_{\mathrm{a}}=\frac{{\mathrm{C\alpha }}^2}{(1-\mathrm{\alpha })}$
$\left(2\right)<mspace\; width="1em"></mspace>\mathrm{Ka}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>{\mathrm{C\alpha }}^2<mspace\; width="1em"></mspace>\mathrm{if}<mspace\; width="1em"></mspace>\mathrm{\alpha }\to 0$
$\left(3\right)<mspace\; width="1em"></mspace>{\mathrm{K}}_{\mathrm{a}}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>\frac{{\mathrm{C\lambda }}^2}{{\mathrm{\lambda }}^2({\mathrm{\lambda }}^2-\mathrm{\lambda })}$
$\left(4\right)<mspace\; width="1em"></mspace>\mathrm{All}<mspace\; width="1em"></mspace>\mathrm{of}<mspace\; width="1em"></mspace>\mathrm{the}<mspace\; width="1em"></mspace>\mathrm{above}$