Advertisements
Advertisements
प्रश्न
A cell constituted by two electrodes A (`"E"_("A"^+//"A")^0` = 0.35 V) and B (`"E"_("B"^+//"B")^0` = + 0.42 V) has value of `"E"_"cell"^0` equal to _________.
विकल्प
0.77 V
0.07 V
–0.77 V
–0.07 V
उत्तर
A cell constituted by two electrodes A (`"E"_("A"^+//"A")^0` = 0.35 V) and B (`"E"_("B"^+//"B")^0`= + 0.42 V) has a value of `"E"_"cell"^0` equal to 0.07 V.
Explanation:
The species which has lesser value of standard reduction potential (E0) is better reducing agent.
A ⇒ Reducing agent = it will undergo oxidation = Anode
B ⇒ Oxidising agent = it will undergo reduction = Cathode
`"E"_"cell"^0 = "E"_"cathode"^0 - "E"_"anode"^0`
`"E"_"cell"^0 = + 0.42 " V" - 0.35 " V"`
`"E"_"cell"^0 = 0.07` V
APPEARS IN
संबंधित प्रश्न
Answer the following in one or two sentences.
How many electrons would have a total charge of 1 coulomb?
Answer the following in brief.
Write electrode reactions for the electrolysis of aqueous NaCl.
Answer the following in brief.
How many moles of electrons are passed when 0.8-ampere current is passed for 1 hour through molten CaCl2?
Answer the following:
Explain electrolysis of molten NaCl.
Answer the following:
What current strength in amperes will be required to produce 2.4 g of Cu from CuSO4 solution in 1 hour? Molar mass of Cu = 63.5 g mol–1.
During electrolysis of molten NaCl, which of the following statements is correct?
Name the process by which water produces hydrogen gas at cathode during electrolysis of aqueous NaCl.
Draw a neat and labelled diagram for electrolysis of fused NaCl.
Draw a well labelled diagram of a conductivity cell. Also write net cell reactions involved in electrolysis of aqueous NaCl.
Write a mathematical formula for mole ratio. How long will it take to produce 2.415g of Ag metal from its salt solution by passing a current of 3A? Molar mass of Ag= 107.9 g mol-1.
Explain construction, working in terms of cell reactions and the results of electrolysis of fused NaCl.
How many moles of electrons are required for reduction of 2 moles of Zn2+ to Zn? How many Faradays of electricity will be required?
How many moles of electrons are passed when 0.8 A current is passed for one hour through molten NaCl?
During the electrolysis of aqueous NaCl, the gas liberated at the cathode is ______.
How much coulomb is one faraday?
The standard electrode potential of electrode
\[\ce{\underset{(0.02M)}{Zn^2+ (aq)} || Zn(s)}\] is -0.76 V. Calculate its electrode potential.
