Question:
The electrode potential of \( \mathrm{M^{2+}/M} \) of 3d-series elements
shows positive value for :
The electrode potential of \( \mathrm{M^{2+}/M} \) of 3d-series elements
shows positive value for :
Show Hint
Copper is the only 3d series metal that does not displace $H_2$ gas from dilute acids because its reduction potential is higher than that of $H^+$.
Updated On: Feb 12, 2026
- Fe
- Co
- Zn
- Cu
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Most 3d transition metals have negative reduction potentials (they are more reactive than hydrogen).
Step 2: Copper has a positive $E^\circ = +0.34$ V.
Step 3: This is because the high energy to transform $Cu_{(s)}$ to $Cu^{2+}_{(aq)}$ is not compensated by its hydration enthalpy.
Step 2: Copper has a positive $E^\circ = +0.34$ V.
Step 3: This is because the high energy to transform $Cu_{(s)}$ to $Cu^{2+}_{(aq)}$ is not compensated by its hydration enthalpy.
Was this answer helpful?
0
0
Top Questions on d And f - Block Elements
- For which of the following ions will the magnetic moment ($\mu$) be maximum?
- UP Board XII - 2026
- Chemistry
- d And f - Block Elements
- (A) Write the electronic configuration of the element with atomic number 24.
(B) Find the number of unpaired electrons in $Co^{2+}$ ion.
(C) Why is the range of oxidation states greater in the actinoid series compared to the lanthanoid series?- UP Board XII - 2026
- Chemistry
- d And f - Block Elements
- Choose the correct statements in respect of hydrides of group 15.
(A) Reducing power increases down the group
(B) Basic nature increases down the group
(C) Stability decreases down the group
(D) Boiling point decreases regularly down the group.- JEE Main - 2026
- Chemistry
- d And f - Block Elements
- Element X is the lightest element of group 7 of periodic table which forms oxo-anion in +6 oxidation state. The colour of potassium salt of the oxo-anion is:
- JEE Main - 2026
- Chemistry
- d And f - Block Elements
- How many unpaired electrons are present in Fe$^{+3}$, Zn$^{+2}$ and Mn$^{+2}$ ?
- PSEB XII - 2025
- Chemistry
- d And f - Block Elements
View More Questions
Questions Asked in JEE Main exam
- Let \( S = \{x^3 + ax^2 + bx + c : a, b, c \in \mathbb{N} \text{ and } a, b, c \le 20\} \) be a set of polynomials. Then the number of polynomials in \( S \), which are divisible by \( x^2 + 2 \), is:
- JEE Main - 2026
- Algebra
- Figure shows the circuit that contains three resistances (\(9\,\Omega\) each) and two inductors (\(4\,\text{mH}\) each). The reading of ammeter at the moment switch \(K\) is turned ON, is _________ A.
- JEE Main - 2026
- Electromagnetic induction
In the following \(p\text{–}V\) diagram, the equation of state along the curved path is given by \[ (V-2)^2 = 4ap, \] where \(a\) is a constant. The total work done in the closed path is:
- JEE Main - 2026
- Thermodynamics
- Let \[ A=\{z\in\mathbb{C}:|z-2|\le 4\} \quad\text{and}\quad B=\{z\in\mathbb{C}:|z-2|+|z+2|=5\}. \] Then the maximum value of \(|z_1-z_2|\), where \(z_1\in A\) and \(z_2\in B\), is:
- JEE Main - 2026
- Miscellaneous
- The value of \[ \int_{-\pi/6}^{\pi/6} \left( \frac{\pi + 4x^{11}}{1 - \sin\left(|x| + \frac{\pi}{6}\right)} \right) dx \] is equal to
- JEE Main - 2026
- Some Properties of Definite Integrals
View More Questions