JEE Mains · Chemistry · STD 12 - 2. Electrochemistry
\(Emf\) of the following cell at \(298 \,K\) in \(V\) is \(x \times 10^{-2} . Zn \left| Zn ^{2+}(0.1\, M ) \| Ag ^{+}(0.01 \,M )\right| Ag\) The value of \(x\) is .... . (Rounded off to the nearest integer) [Given \(: E_{Z n^{+2}/Z_{n}}^{0}=-0.76 \,V ; E _{A g^{+} / A_{ g }}^{0}=+0.80 \,V ; \frac{2.303 RT }{ F }=0.059\)]
- A \(147\)
- B \(157\)
- C \(188\)
- D \(288\)
Answer & Solution
Correct Answer
(A) \(147\)
Step-by-step Solution
Detailed explanation
\(Zn _{( s )} \rightarrow Zn _{( aq .)}^{2+}+2 e ^{-}\) \(2 Ag ^{+}_{( aq. )}+2 e ^{-} \rightarrow 2 Ag _{( s )}\) __________________________________________________ \(Zn _{( s )}+2 Ag ^{+}_{( aq. )} \rightarrow Zn _{( aq .)}^{2+}+ 2 Ag _{( s )}\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- During Kinetic study of reaction \(2 A+B \rightarrow C+D\), the following results were obtained :
Based on above data, overall order of the reaction is _______.\(A[M]\) \(B[M]\) initial rate of formation of \(D\) \(i\) \(0.1\) \(0.1\) \(6.0 \times 10^{-3}\) \(ii\) \(0.3\) \(0.2\) \(7.2 \times 10^{-2}\) \(ii\) \(0.3\) \(0.4\) \(2.88 \times 10^{-1}\) \(iv\) \(0.4\) \(0.1\) \(2.40 \times 10^{-2}\) JEE Mains 2024 Medium - In a linear tetrapeptide (Constituted with different amino acids), (number of amino acids) - (number of peptide bonds) isJEE Mains 2022 Medium
- An amine \(( X )\) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains clear. Molar mass of the amine \((X)\) formed is _______ \(gmol ^{-1}\).
(Given molar mass in \(gmol ^{-1} C : 12, H : 1, O : 16, N: 14\) )JEE Mains 2024 Medium - Identify the incorrect statementJEE Mains 2013 Hard
- The elements with atomic numbers \(101\) and \(104\) belong to, respectivelyJEE Mains 2020 Medium
- The energy of an electron in the first Bohr orbit of hydrogen atom is \(-2.18 \times 10^{-18}\,J\). Its energy in the third Bohr orbit is \(........\).JEE Mains 2023 Medium
More PYQs from JEE Mains
- Let the tangent to the circle \(C _{1}: x^{2}+y^{2}=2\) at the point \(M (-1,1)\) intersect the circle \(C _{2}\) : \(( x -3)^{2}+(y-2)^{2}=5\), at two distinct points \(A\) and \(B\). If the tangents to \(C _{2}\) at the points \(A\) and \(B\) intersect at \(N\), then the area of the triangle \(ANB\) is equal toJEE Mains 2022 Hard
- A stone of mass \(900 \mathrm{~g}\) is tied to a string and moved in a vertical circle of radius \(1 \mathrm{~m}\) making \(10\ \mathrm{rpm}\). The tension in the string, when the stone is at the lowest point is _______. (if \(\pi^2=9.8\) and \(g=9.8 \mathrm{~m} / \mathrm{s}^2\) )JEE Mains 2024 Hard
- A player kicks a football with an initial speed of \(25\, {ms}^{-1}\) at an angle of \(45^{\circ}\) from the ground. What are the maximum height and the time taken by the football to reach at the highest point during motion ? (Take g \(=10 \,{ms}^{-2}\) )JEE Mains 2021 Medium
- If the area of the region \(S=\left\{(x, y): 2 y-y^2 \leq x^2 \leq 2 y, x \geq y\right\}\) is equal to \(\frac{ n +2}{ n +1}-\frac{\pi}{ n -1}\), then the natural number \(n\) is equal to \(...............\).JEE Mains 2023 Hard
- Two vectors \(\vec A\) and \(\vec B\) have equal magnitudes. The magnitude of \((\vec A + \vec B)\) is \(‘n’\) times the magnitude of \((\vec A - \vec B)\). The angle between \( \vec A\) and \(\vec B\) isJEE Mains 2021 Hard
- If \(f(x)=\frac{2^{2 x}}{2^{2 x}+2}, x \in R\) then \(f\left(\frac{1}{2023}\right)+f\left(\frac{2}{2023}\right)+\ldots \ldots . .+f\left(\frac{2022}{2023}\right)\) is equal toJEE Mains 2023 Hard