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In a first-order reaction A → product, 80% of the given sample of compound decomposes in 40 min. What is the half-life period of the reaction?
Concept: Half Life Period of a Reaction
Choose the most correct option.
Which of the following is not correct?
Concept: Electrochemistry
Answer the following in one or two sentences.
Write any two functions of salt bridge.
Concept: Galvanic or Voltaic Cell
Answer the following in one or two sentences.
What is standard cell potential for the reaction
\[\ce{3Ni_{(s)} + 2Al^{3+} (1M) → 3Ni^{2+} (1M) + 2Al(s)}\], if `E_"Ni"^circ` = –0.25 V and `"E"_("Al")^circ` = –1.66 V?
Concept: Electrode Potential and Cell Potential
Answer the following in one or two sentences.
Write Nernst equation. What part of it represents the correction factor for nonstandard state conditions?
Concept: Electrode Potential and Cell Potential
Write electrode reactions for the electrolysis of aqueous NaCl.
Concept: Electrolytic Cell
Answer the following in brief.
Construct a galvanic cell from the electrodes Co3+ | Co and Mn2+/Mn. \[\ce{E{^{\circ}_{Co}}}\] = 1.82 V, \[\ce{E{^{\circ}_{Mn}}}\] = –1.18 V. Calculate \[\ce{E{^{\circ}_{cell}}}\]
Concept: Electrode Potential and Cell Potential
Derive the relationship between standard cell potential and equilibrium constant of cell reaction.
Concept: Thermodynamics of Galvanic Cells
It is impossible to measure the potential of a single electrode. Comment.
Concept: Reference Electrodes
What are anode and cathode for Leclanche’ dry cell?
Concept: Galvanic Cells Useful in Day-to-day Life
The molar conductivity and conductivity of AgNO3 solution is 121.4 Ω–1 cm2 mol–1 and 2.428 × 10–3 Ω–1 cm–1 at 25 °C. What is molar concentration of AgNO3 solution?
Concept: Electrical Conductance of Solution
What are the functions of a salt bridge in a galvanic cell?
Concept: Galvanic or Voltaic Cell
How many moles of electrons are required for reduction of 2 moles of Zn2+ to Zn?
Concept: Electrochemical Cells
Draw a neat and well labelled diagram of Standard Hydrogen Electrode. Also write its one application.
Concept: Reference Electrodes
Calculate the voltage of the cell Sn(s) / Sn2+(0.02 M) // Ag+ (0.01 M) / Ag(s) at 25 °C.
Given: `"E"_"Sn"^circ` = - 0.136, `"E"_"Ag"^circ` = 0.800 V
Concept: Electrode Potential and Cell Potential
Write working of NICAD storage cell. Also write its applications.
Concept: Galvanic Cells Useful in Day-to-day Life
Calculate `"E"_"cell"^circ` of the following galvanic cell:
Mg(s) / Mg2+(1 M) // Ag+ (1 M) / Ag(s) if `"E"_"Mg"^circ` = – 2.37 V and `"E"_"Ag"^circ` = 0.8 V. Write cell reactions involved in the above cell. Also mention if cell reaction is spontaneous or not.
Concept: Electrode Potential and Cell Potential
The standard potential of the cell in the following reaction is ______.
\[\ce{Cd_{(s)} + Cu^{2+}_{(1M)} -> Cd^{2+}_{(1M)} + Cu_{(s)}}\]
`("E"_("Cd")^circ = - 0.403V, "E"_("Cu")^circ = 0.334V)`
Concept: Electrode Potential and Cell Potential
The value of [H3O+] in mol lit–1 of 0.001 M acetic acid solution (Ka = 1.8 × 10–5) is ______.
Concept: Electrical Conductance of Solution
