EASY
Earn 100

Which of the following statement are correct about  Ni-Cd cell

50% studentsanswered this correctly

Important Questions on Electrochemistry

HARD
Chemistry>Physical Chemistry>Electrochemistry>Batteries
Draw a neat labelled diagram of H2-O2 fuel cell. Write the reaction which occurs at cathode of the cell?
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
In a hydrogen-oxygen fuel cell, the combustion of hydrogen occurs to
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Batteries
What is the density of a solution of sulphuric acid used as an electrolyte in lead accumulators?
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Batteries
Which among the following equations represents the reduction taking place in lead accumulator at positive electrode, While it is being used as a source of electrical energy?
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
Which colourless gas evolves when NH4Cl reacts with zinc in a dry cell battery ?
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as:
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
The correct statements among (a) to (d) regarding H2 as a fuel are:

a It produces less pollutants than petrol

b A cylinder of compressed dihydrogen weighs ∼30 times more than a petrol tank producing the same amount of energy

c Dihydrogen is stored in tanks of metal alloys like NaNi5

d On combustion, values of energy released per gram of liquid dihydrogen and LPG are 50 and 142 kJ , respectively
 
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
During the charging of a lead storage battery, which of the following reactions do not occur at anode?
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Batteries

In hydrogen-oxygen fuel cell, combustion of hydrogen occurs to –

EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
Which is/are correct about fuel cells?
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
In a Leclanche cell, MnO2 acts as _____.
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
The electrolyte used in H2-O2 fuel cells is concentrated _____ hydroxide.
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Batteries
During the discharge of lead storage battery,
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Batteries
Mark out the right combination of cell and condotopics for spontaneity
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
Which of the following statements are correct about Ni-Cd cell?
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
When 1 F of electricity is passed through acidulated water, O2 evolved is
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Batteries
In a lead storage cell, the cathode consists of _____.
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
H2-O2 fuel cell involves following reaction(s):
HARD
Chemistry>Physical Chemistry>Electrochemistry>Batteries
The biggest difference between the two is that a battery stores energy, while a fuel cell generates energy by converting available _____. 
EASY
Chemistry>Physical Chemistry>Electrochemistry>Batteries
Which of the following statements are correct regarding dry cell?