Which cell will measure standard electrode potential of copper electrode?
a. Pt (s) | H₂ (g, 0.1 bar) | H⁺ (aq., 1 M) || Cu²⁺ (aq., 1 M) | Cu
b. Pt (s) | H₂ (g, 1 bar) | H⁺ (aq., 1 M) || Cu²⁺ (aq., 2 M) | Cu
c. Pt (s) | H₂ (g, 1 bar) | H⁺ (aq., 1 M) || Cu²⁺ (aq., 1 M) | Cu
d. Pt (s) | H₂ (g, 1 bar) | H⁺ (aq., 0.1 M) || Cu²⁺ (aq., 1 M) | Cu
a. Pt (s) | H₂ (g, 0.1 bar) | H⁺ (aq., 1 M) || Cu²⁺ (aq., 1 M) | Cu
b. Pt (s) | H₂ (g, 1 bar) | H⁺ (aq., 1 M) || Cu²⁺ (aq., 2 M) | Cu
c. Pt (s) | H₂ (g, 1 bar) | H⁺ (aq., 1 M) || Cu²⁺ (aq., 1 M) | Cu
d. Pt (s) | H₂ (g, 1 bar) | H⁺ (aq., 0.1 M) || Cu²⁺ (aq., 1 M) | Cu
c. Pt (s) | H₂ (g, 1 bar) | H⁺ (aq., 1 M) || Cu²⁺ (aq., 1 M) | Cu
There are two possible reactions for cathode in the electrolysis of aqueous
\(ZnCl_2\) :\(Zn^{2+}\) (aq) + 2\(e^-\) → Zn(s) \(E^0\) = -0.76 V
2\(H_2\)O (l) + 2\(e^-\) → H2 (g) + 2\(OH^-\) (aq) \(E^0\) = - 0.83 V
Which one will take place? Why?
Limiting molar conductivity of NH4OH is equal to -:
a. Λᵒₘ(NH₄Cl) + Λᵒₘ(NaCl) + Λᵒₘ(NaOH)
b. Λᵒₘ(NaOH) + Λᵒₘ(NaCl) - Λᵒₘ(NH₄Cl)
c. Λᵒₘ(NaOH) - Λᵒₘ(NH₄Cl) - Λᵒₘ(HCl)
d. Λᵒₘ(NH₄Cl) + Λᵒₘ(NaOH) - Λᵒₘ(NaCl)
The difference between the electrode potentials of two electrodes when no current is drawn through the cell is called ___________.
a. Cell potential.
b. Electromotive Force.
c. Potential difference.
d. Cell voltage.
Looking at the setup of an electrochemical cell, what happens when \(E_{ext}\) > 1.1 V
(a) Calculate G° for the reaction
Zn(s) + \(Cu^{2+}\)(aq) → \(Zn^{2+}\)(aq) + Cu(s)
Given: E° for \(Zn^{2+}\)/Zn = -0.76V and E° for \(Cu^{2+}\)/Cu = +0.34 V
R = 8.314 \(JK^{–1}\) \(mol^{–1}\), F = 96500 \(mol^{–1}\)
How is electrical conductance of a conductor related with length and area of cross-section of the conductor?
a. G = \(l. a.k^{-1}\)
b. G = \(k. l.a^{-1}\)
c. G = \(k.a. l^{-1}\)
d. G = \(k. l.a^{-2}\)
The molar conductivity of 0.025 mol L⁻¹ methanoic acid is 46.1 S cm² mol⁻¹. Calculate its degree of dissociation and dissociation constant. Given λ°(H⁺) = 349.6 S cm² mol⁻¹ and λ°(HCOO⁻) = 54.6 S cm² mol⁻¹.
One mole of ethyl acetate on treatment with an excess of \(LiAlH_4\) in dry ether and subsequent acidification produces
(a) 1 mole acetic acid + 1 mole ethyl alcohol.
(b) 1 mole ethyl alcohol + 1 mole methyl alcohol.
(c) 2 moles of ethyl alcohol.
(d) 1 mole of 2-butanol.
Each polypeptide in protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be-
(a) primary structure of proteins.
(b) secondary structure of proteins.
(c) tertiary structure of proteins.
(d) quaternary structure of proteins.
Limiting molar conductivity of NH4OH is equal to -:
a. Λᵒₘ(NH₄Cl) + Λᵒₘ(NaCl) + Λᵒₘ(NaOH)
b. Λᵒₘ(NaOH) + Λᵒₘ(NaCl) - Λᵒₘ(NH₄Cl)
c. Λᵒₘ(NaOH) - Λᵒₘ(NH₄Cl) - Λᵒₘ(HCl)
d. Λᵒₘ(NH₄Cl) + Λᵒₘ(NaOH) - Λᵒₘ(NaCl)
Graphite cannot be classified as __________.
(A) Conducting solid
(B) Network solid
(C) Covalent solid
(D) Ionic solid
Although Zirconium belongs to 4d transition series and Hafnium to 5d transition series even then they show similar physical and chemical properties because
(a) both belong to d-block.
(b) both have same number of electrons.
(c) both have similar atomic radius.
(d) both belong to the same group of the periodic table.
Looking at the setup of an electrochemical cell, what happens when \(E_{ext}\) > 1.1 V