Standard electrode potential of three metals X, Y and Z are -1.2 V, +0.5 V and -3.0 V respectively. The reducing power of these metals will be

• Y > X > Z

• Z > X > Y

• X > Y > Z

• Y > Z > X

If the ${\mathrm{E}}_{\mathrm{cell}}^{°}$ for a given reaction has a negative value then which of the following gives the correct relationships for the values of $∆$G° and K_eq?

• $∆\mathrm{G}°$ < 0; K_eq > 1

• $∆\mathrm{G}°$ <0; K_eq < 1

• $∆\mathrm{G}°$ > 0; K_eq < 1

• $∆\mathrm{G}°$ > 0; K_eq > 1

The conductivity of 0.001028 mol L^-1 acetic acid is 4.95 x 10^-5 S cm^-1. Find out its dissociation constant if Λ_m for acetic acid is 390.5 S cm^-1 mol^-1.

• 2.18 x 10^-5 mol^-1L^-1

• 1.78 x 10^-5 mol L^-1

• 3.72 x 10^-4 mol L^-1

• 2.37 x 10^-4 mol L^-1

Which of the following statement is not correct about an inert electrode in a cell?

• It does not participate in the cell reaction.

• It provides surface either for oxidation or for reduction reaction.

• It provides surface for conduction of electrons.

• It provides surface for redox reaction

Which of the following statement is correct?

• E_cell and ${∆}_{\mathrm{f}}$G of cell reaction both are extensive properties.

• E_cell and ${∆}_{\mathrm{f}}\mathrm{G}$ of cell reaction both are intensive properties

• E_cell in the intensive property while ${∆}_{\mathrm{r}}\mathrm{G}$ of cell reaction is an extensive property

• E_cell is an extensive property while ${∆}_{\mathrm{r}}\mathrm{G}$ of cell reaction is an intensive property.

When Br₂ is treated with aqueous solutions of NaF, NaCl, NaI separately

• F₂, Cl₂ and I₂ are liberated

• only F₂ and Cl₂ are liberated

• only I₂ is liberated

• only Cl₂ is liberated

Electrolysis of fused NaCl will give

• Na

• NaOH

• NaClO

• NaClO₃

How long it will take to deposit 1.0 g of chromium when a current of 1.25 A flows through a solution of chromium (III) sulphate ? (Molar mass of Cr = 52)

• 1.24 min

• 1.24 h

• 1.24 s

• None of these

The compounds formed at anode in the electrolysis of an aqueous solution of potassium acetate, are

• C₂H₆ and CO₂

• C₂H₄ and CO₂

• CH₄ and H₂

• CH₄ and CO₂

What is the electrode potential (in V) of the following electrode at 25°C ?

Ni²⁺ (0.1 M) | Ni(s)

(Standard reaction potential of Ni²⁺ | Ni is -0.25V, $\frac{2.303 \mathrm{RT}}{\mathrm{F}} = 0.06$)

• -0.28V

• -0.34V

• -0.82V

• -0.22V