Value of ${{\wedge }_m}^0$ for $$ $SrC{l}_2$ (strong electrolyte) in water at $\mathrm{25 }°C$ from the data below is:

1. 270 Ω^-1 cm² mol^-1                                                     

2. 260 Ω^-1 cm² mol^-1 

3. 250 Ω^-1 cm² mol^-1                                                    

4. 255 Ω^-1 cm² mol^-1 

During electrolysis of conc. H₂SO₄, perdisulphuric acid (H₂S₂O₈), and O₂ form in equimolar amount. The amount of H₂ that will form simultaneously will be : 

1. Thrice that of O₂ in moles.

2. Twice that of O₂ in moles.

3. Equal to that of O₂ in moles.

4. Half of that of O₂ in moles.

Consider the following Galvanic cell.

By what value the cell voltage change when concentration of ions in anodic and cathodic compartments both increased by a factor of 10 at 298 

1.  +0.0591

2.  -0.0591

3.  -0.1182

4.  0

Which characteristic of hydrogen makes it hazardous as a fuel?
1. High ignition with low combustion energy
2. High ignition with high combustion energy
3. Low ignition with low combustion energy
4. Low ignition with high combustion energy

The decreasing order of electrical conductivity of the following aqueous solutions is :
0.1 M Formic acid (A),
0.1 M Acetic acid (B),
0.1 M Benzoic acid (C)

1. A > B > C

2. A > C > B

3. C > B > A

4. C > A > B

Given below are the half-cell reactions :

$\begin{array}{l}{\mathrm{Mn}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{Mn};{\mathrm{E}}^{\circ }=-1.18\mathrm{V}\\ 2({\mathrm{Mn}}^{3+}+{\mathrm{e}}^{-}\to {\mathrm{Mn}}^{2+});{\mathrm{E}}^{\circ }=+1.51\mathrm{V}\end{array}$

The Eº for 3Mn²⁺ → Mn + 2Mn³⁺ will be :

1. – 2.69 V; the reaction will occur

2. – 0.33 V; the reaction will not occur

3. – 0.33 V; the reaction will occur

4. – 2.69 V; the reaction will not occur

The reduction potential of hydrogen half-cell will be negative if:

1. P(H₂) = 1atm and [H⁺] = 2.0 M

2. P(H₂) = 1 atm and [H⁺] = 1.0 M

3. P(H₂) = 2 atm and [H⁺] = 1.0 M

4. P(H₂) = 2 atm and [H⁺] = 2.0 M

For the following cell with hydrogen electrodes at two different pressures p₁ and p₂ 
Pt(H₂) | H⁺(aq) |Pt (H₂)
  p₁         1M        p₂   
emf  is given by:

1. \(\frac{R T}{F} \log _{e} \frac{P_{1}}{p_{2}}\)
2. \(\frac{R T}{2F} \log _{e} \frac{P_{1}}{p_{2}}\)
3. \(\frac{R T}{F} \log _{e} \frac{P_{2}}{p_{1}}\)
4. \(\frac{R T}{2F} \log _{e} \frac{P_{2}}{p_{1}}\)