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The EMF of a Daniel cell at $298\text{ K}$ is $E_1$: $Zn|ZnSO_4(0.01\text{ M}) || CuSO_4(1.0\text{ M})|Cu$. When the concentration of $ZnSO_4$ is $1.0\text{ M}$ and that of $CuSO_4$ is $0.01\text{ M}$, the EMF is changed to $E_2$. The correct relationship between $E_1$ and $E_2$ is:
Limiting molar conductivity of $\text{NH}_4\text{OH}$ (i.e., $\Lambda^\circ_m(\text{NH}_4\text{OH})$) is equal to:
The correct relation between dissociation constants of a di-basic acid is:
Limiting molar conductivity of $\text{NH}_4\text{OH}$ (i.e. $\Lambda^\circ_m(\text{NH}_4\text{OH})$) is equal to:
Given below are half-cell reactions: $MnO_4^- + 8H^+ + 5e^- \rightarrow Mn^{2+} + 4H_2O \ ; \ E^\circ_{Mn^{2+}/MnO_4^-} = -1.510\text{ V}$ $\frac{1}{2}O_2 + 2H^+ + 2e^- \rightarrow H_2O \ ; \ E^\circ_{O_2/H_2O} = +1.223\text{ V}$ Will the permanganate ion, $MnO_4^-$, liberate $O_2$ from water in the presence of an acid?
A hypothetical electrochemical cell is shown below: $\text{A} | \text{A}^+(x\text{ M}) || \text{B}^+(y\text{ M}) | \text{B}$ The EMF measured is $+0.20 \text{ V}$. The cell reaction is:
The solubility of AgCl(s) with solubility product $1.6 \times 10^{-10}$ in 0.1 M NaCl solution would be:
The ionisation constant of ammonium hydroxide is $1.77 \times 10^{-5}$ at 298 K. Hydrolysis constant of ammonium chloride is:
In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of $2.0 \times 10^{10}$ Hz and amplitude $48$ V m$^{-1}$. Then the amplitude of oscillating magnetic field is (Speed of light in free space = $3 \times 10^8$ m s$^{-1}$)
In which of the following compounds, the C—Cl bond ionization shall give the most stable carbonium ion?
Standard free energies of formation (in $\text{kJ/mol}$) at $298 \text{ K}$ are $-237.2$, $-394.4$ and $-8.2$ for $\text{H}_2\text{O}(l)$, $\text{CO}_2(g)$ and pentane (g), respectively. The value of $E^\circ_{\text{cell}}$ for the pentane-oxygen fuel cell is
Given below are two statements: Statement I: $2\text{ F}$ electricity is required for the oxidation of $1\text{ mole H}_2\text{O}$ to $\text{O}_2$. Statement II: To get $40.0\text{ g}$ of Aluminium from molten $\text{Al}_2\text{O}_3$ required electricity is $4.44\text{ F}$. In the light of the above statements, choose the correct answer from the options given below:
Consider following features (a) Organ system level of organisation (b) Bilateral symmetry (c) True coelomates with segmentation of body Select the correct option of animal groups which possess all the above characteristics (1) Annelida, Arthropoda and Chordata (2) Annelida, Arthropoda and Mollusca (3) Arthropoda, Mollusca and Chordata (4) Annelida, Mollusca and Chordata
The angular acceleration of a body, moving along the circumference of a circle, is
Among the following examples, the species that behave(s) as a Lewis acid is/are: $\text{BF}_3$, $\text{SnCl}_2$, $\text{SnCl}_4$
The strongest acid among the following compounds is:
The value of $K_{p_1}$ and $K_{p_2}$ for the reactions $X \rightleftharpoons Y + Z$ ...(i) and $A \rightleftharpoons 2B$ ...(ii) are in the ratio of $9 : 1$. If the degree of dissociation of X and A is equal, then the total pressure at equilibrium (i) and (ii) are in the ratio:
Consider the reaction: $\text{CH}_3\text{CH}_2\text{CH}_2\text{Br} + \text{NaCN} \rightarrow \text{CH}_3\text{CH}_2\text{CH}_2\text{CN} + \text{NaBr}$ This reaction will be the fastest in
Standard electrode potential for $\text{Sn}^{4+}/\text{Sn}^{2+}$ couple is $+0.15 \text{ V}$ and that for $\text{Cr}^{3+}/\text{Cr}$ couple is $-0.74 \text{ V}$. These two couples in their standard state are connected to make a cell. The cell potential will be:
4 gm of NaOH is dissolved in 1000 ml of water. The $\text{H}^+$ ion concentration will be: