How many columbs of electricity are consumed when 100 mA current is passed through a solution of AgNO₃ for 30 minute during an electrolysis experiment?

1. 108

2. 18000

3. 180

4. 3000

Standard reduction potentials at 25$°$C of Li⁺/Li, Ba²⁺/Ba, Na⁺/Na and Mg²⁺/Mg are -3.05, -2.90, -2.71 and -2.37 V respectively. Which one of the following is the strongest oxidising agent ?

1. Mg²⁺

2. Ba²⁺

3. Na⁺

4. Li⁺

Equivalent conductances of NaCl, HCl and C₂H₅COONa at infinite dilution are 126.45, 426.16 and 91 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$. The equivalent conductance of C₂H₅COOH is : 

1. 201.28 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$

2. 390.71 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$

3. 698.28 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$

4. 540.48 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$

When an electric current is passed through acidulated water, 112 mL of hydrogen gas at STP collects at the cathode in 965 second. The current passed, in ampere is:

1. 1.0

2. 0.5

3. 0.1

4. 2.0

The electric charge for electrode deposition of 1g equivalent of a substance is:

1. 1 ampere per second

2. 96,500 coulomb per second

3. 1 ampere for 1 hour

4. charge on 1 mole of electrons

The change in reduction potential of a hydrogen electrode when its solution initialy at pH = 0 is neutralised to pH = 7, is a/an-

 The cell reaction for the given cell is spontaneous if:

Pt_cl2|cl^-(1M)||Cl^-(1M)|Pt_Cl2

1. P₁ > P₂ 

2. P₁ < P₂

3. P₁ = P₂

4. P₁ = 1 atm

Each of the three metals X, Y and Z were put in turn into aqueous solution of the other two.

X + Salt of Y (or Z) ⟶  Y (or Z) + Salt of X.

Which observation is probably incorrect?

1. Y + Salt of X = No action observed

2. Y + Salt of Z = Z + Salt of Y

3. Z + Salt of X = X + Salt of Z

4. Z + Salt of Y = No action observed

The standard reduction potentials of Cu²⁺/Cu and Cu²⁺/Cu⁺ are 0.337 and 0.153V respectively. The standard electrode potential of Cu⁺/Cu half cell is:

1. 0.184V 

2. 0.827V

3. 0.521V

4. 0.490V