Acetic acid has K_a = 1.8 × 10^–5 while formic acid had K_a = 2.1 × 10^–4. What would be the magnitude of the emf of the cell

Pt(H₂) $\left|\begin{array}{l}0.1\mathrm{M} \mathrm{acetic} \mathrm{acid}+\\ 0.1\mathrm{M} \mathrm{sodium} \mathrm{acetate}\end{array}\right|\left|\begin{array}{l}0.1\mathrm{M} \mathrm{formic} \mathrm{acid}+\\ 0.1\mathrm{M} \mathrm{sodium} \mathrm{formate}\end{array}\right|$ Pt(H₂) at 25°C

(1) 0.0315 volt

(2) 0.0629 volt

(3) 0.0455 volt

(4) 0.0545 volt

What will be the quantity of iron deposited by ferrous and ferric ion by 1F (Fe = 56)

(1) 14g, 9.3 g                                          

(2) 28g, 18.6 g

(3) 56g, 37.2g                                         

(4) None of these

The unit of specific conductance is:

What is the value of 

$p{K}_b (C{H}_{3}CO{O}^{-} )$
$if {\lambda }_m^0= 390 \& {\lambda }_m = 7.8$
$for 0.04 of a C{H}_{3}COOH at 25°C$

(A) 9.3                                               

(B) 9.2

(C) 4.7                                               

(D) 4.8

Given that a certain electric current generates 0.504 grams of hydrogen in 2 hours. How many gram of mass of copper can be liberated by the same current when applied for the same duration in a solution of CuSO₄?

1. 12.7

2. 16

3. 31.8

4. 63.5

The metal that cannot be produced upon reduction of its oxide by aluminium is :

 $E^0 for the reaction$
$Fe + Z{n}^{2+} = Zn + F{e}^{2+} is – 0.35 V.$
$The given cell reaction is-$ 

(A) Feasible                                                                  

(B) Not feasible

(C) In equilibrium                                                         

(D) None

Adiponitrile is manufactured electrolytically from acrylonitrile. The reaction is as follows:
$C{H}_2=$ $CHCN$ $\to$ $CN$ $–$ $(C{H}_2$ ${)}_4$ $–$ $CN$

How many kg of adiponitrile (molecular mass = 108) is produced in 9.65 hr using a current of 3750 A with 80 % efficiency?

1. 30 kg                                               

2. 58 kg

3. 60 kg                                               

4. 80 kg

A certain metal salt solutions is electrolysed in series with a silver coulometer. The weights of silver and the metal deposited are 0.5094 g and 0.2653 g. Calculate the valency of the metal if its atomic weight is nearly that of silver. 

(A) 1                                                 

(B) 2

(C) 3                                                 

(D) 4

$The Cell Pt\left(H_2\right)(1 atm)\left|H^{\oplus }\right(pH=?),I^{\oplus }(a=1\left)\right|AgI\left(s\right),$Ag has emf, $E_{298}=0$. The electrode potential for the reaction AgI + $e^{-}\to Ag+I^{\oplus }$ is -0.151 volt. Calculate the pH value.

(A) 3.37                                                           

(B) 5.26

(C) 2.56                                                           

(D) 4.62