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.
Fructose contains functional group-
(a) Aldehyde
(b) Ketone
(c) Carboxylic acid
(d) primary amine
1-Phenylethanol can be prepared by the reaction of benzaldehyde with
(a) methyl bromide.
(b) ethyl iodide and magnesium.
(c) methyl iodide and magnesium.
(d) methyl bromide and aluminium bromide.
Molecules whose mirror image is non-superimposable over them are known as chiral. Which of the following molecules is chiral in nature?
(a) 2-Bromobutane.
(b)1-Bromobutane.
(c) 2-Bromopropane.
(d) 2-Bromopropan-2-ol.
Which statement correct about halogens?
a) They are all diatomic and form univalent ions.
b) They are all capable of exhibiting several oxidation states.
c) They are all diatomic and form diatomic ions.
d) They are all reducing agents.
The functional group which is found in amino acid is-
(a)-COOH
(b) -\(NH_2\)
(c) -\(CH_3\)
(d) both (a) and (b)
The idea that promoted to Bartlett to prepare first ever compound of Noble gases was
a) Low bond dissociation enthalpy of F-F bond in \(F_2\).
b) High bond enthalpy of Xe-F bond.
c) Ionization enthalpies of \(O_2\) and Xe are almost same.
d) None of the above.
On a large-scale nitric acid is prepared mainly by
a) Haber's process
b) Ostwald’s process
c) Contact Process
d) Deacon's process