The emf of a galvanic cell is positive when the free energy change of the reaction is
In a dry cell, the depolarizer is
In metals, the conduction of electricity is due to
Which of the following is used in laptops and mobiles?
The electrode potential of the calomel electrode used as a reference electrode
Which of the following is true regarding a lead-acid battery?
The rechargeable cells are known as
What kind of battery is used in laptops, computers, and mobile phones?
The standard reduction potentials at 298K are: Zn2+(aq)+2e- → Zn(s) = -0.762V; Cr3+(aq)+3e- → Cr(s) = -0.740V; 2H+(aq)+2e- → H2(g) = 0.00V; Fe3+(aq)+e- → Fe2+(aq) = 0.770V. Which is the strongest reducing agent?
The electrode potential measures the:
The standard reduction potential (E0red) of P, Q, and R are 0.68V, -2.54V, and -0.50V, respectively. The order of their reducing power is
Which one is the strongest reducing agent? (Given, Na+ + e- → Na; E0 = -2.71V and Al3+ + 3e- → Al; E0 = -1.66V)
A device that converts the energy of combustion of fuels like hydrogen and methane directly into electrical energy is known as
What flows in the internal circuit of a Galvanic cell?
The aqueous solution of which of the following compounds is the best conductor of electric current?
The most commonly used battery in automobiles is
The reduction potential of an electrode
Standard electrode potential of four metals P, Q, R, and S are +0.34V, -0.25V, -2.93V, and +0.85V, respectively. Which is the correct arrangement in the order of decreasing reactivity?
When one end of a metal plate is heated, the other end gets hot because of
