Identify the reaction from following having top position in EMF series (Std. red. potential) according to their electrode potential at 298 K.
(1) K+ + 1e– → K(s)
(2) Mg2+ + 2e– → Mg(s)
(3) Fe2+ + 2e– → Fe(s)
(4) Au3+ + 3e– → Au(s)
In a typical fuel cell, the reactant (R) and product (P) are (1) R = H2(g) · N2(g) : P = NH3(aq) (2) R = H2(g) · O2(g) : P = H2O2(l) (3) R = H2(g) · O2(g) : P = H2O(l) (4) R = H2(g) · O2(g) · Cl2(g) : P = HClO4(aq)
In the electrochemical cell : $\require{mhchem}\ce{Zn|ZnSO4}(\text{0.01 M})||\ce{CuSO4}(\text{1.0 M})|\ce{Cu}$, the emf of this Daniell cell is $E_1$. When the concentration of $\ce{ZnSO4}$ is changed to $\text{1.0 M}$ and that of $\ce{CuSO4}$ changed to $\...
For the disproportionation reaction 2Cu+(aq) $\rightleftharpoons$ Cu(s) + Cu2+(aq) at 298 K, In K (where K is the equilibrium constant) is________ 10-1. Given $\left(E_{Cu^{2+}/Cu^+}^o=0.16V,\ E_{Cu^+/Cu}^o=0.52V,\ {RT\over F}=0.025\right)$ Numerical ...
The Gibbs energy change (in J) for the given reaction at [Cu2+] = [Sn2+] = 1 M and 298 K is : Cu(s) + Sn2+(aq.) $\longrightarrow$ Cu2+ (aq.) + Sn(s); ($E_{Sn^{2+}|Sn}^0$ = –0.16 V, $E_{Cu^{2+}|Cu}^0$ = 0.34 V, Take F = 96500 C mol–1) Numerical Value Type
Identify compound (A) in the following reaction: (1) Benzoic acid (2) Benzoyl chloride (3) Toluene (4) Acetophenone
What is the role of gypsum, CaSO4·2H2O in setting of cement? Identify the correct option from the following : (1) to slow down the setting process (2) to fasten the setting process (3) to provide water molecules for hydration process (4) to help to remove ...
For a cell involving one electron $E^o_{cell}$ = 0.59 V at 298 K, the equilibrium constant for the cell reaction is : $[{\text{Given That } {2.303 RT\over F}=0.059 V\text{ at }T=298K}]$ (1) 1.0 × 102 (2) 1.0 × 105 (3) 1.0 × 1010 (4) 1.0 × 1030
For the cell reaction $2Fe^{3+}(aq) +2I^-(aq)\to 2Fe^{2+} (aq)+ I _2(aq)$ $E^o _{Cell}=0.24 V $ at 298 K. The standard Gibbs energy $(\Delta_r G^o)$ of the cell reaction is : (1) –46.32 kJ mol–1 (2) –23.16 kJ mol–1 (3) 46.32 kJ mol–1 (4) 23.16 kJ mol–1
Identify the correct statement from the following. (1) Lithium chloride is deliquescent and crystallises as a hydrate, LiCI·H2O. (2) The order of hydration enthalpies of alkaline earth cations Be2+ < Mg2+ < Ca2+ < Sr2+ < Ba2+ (3) Lithium and Magnesium show ...
Identify the incorrect statement from the following : (1) The overall decrease in atomic and ionic radii from lanthanum to lutetium is called lanthanoid contraction (2) Zirconium and Hafnium have identical radii of 160 pm and 159 pm, respectively as a ...
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