Chemistry, asked by MMMMMMMMMMM8261, 8 months ago

The correct order of M²⁺ /M E° + values with negative sign
for the four successive elements Cr, Mn, Fe and Co is
(a) Mn > Cr > Fe > Co (b) Cr < Fe > Mn > Co
(c) Fe > Mn > Cr > Co (d) Cr > Mn > Fe > Co

Answers

Answered by Fatimakincsem
3

The correct order is  Mn> Cr> Fe> Co.

Option (A) is correct.

Explanation:

Usually across the first transition series, the negative values for standard electrode potential decrease except for Mn due to stable d5-configuration.

The electronic configuration of various elements in Mn^ 2+  state is:

  • Cr- [Ar] 3d^4  
  • Mn-Cr- [Ar] 3d^5   -half filled- most stable.
  • Fe-Cr- [Ar] 3d^6  
  • Co-Cr- [Ar] 3d^7  

So, based on above facts the correct order is:

Mn> Cr> Fe> Co.

Thus the correct order is  Mn> Cr> Fe> Co.

Also learn more

Which element has highest electronegativity?

https://brainly.in/question/1645747

Previous Question
Next Question
Similar questions
Computer Science, 4 months ago
The practice of computational thinking fosters key-skills in children like perseverance, debugging, creating Algorithm Design means developing the list of steps that we call logical thinking to develop a step-by-step strategy to solve any problem. Logical Thinking helps us to develop a step-by-step solution for any given problem. ). experimenting Brain DEVELOPER Fill in the blanks: An algorithm...
Hindi, 4 months ago
३. बच्चे आए हैं और खेल रहे हैं । - वाक्य रचना की दृष्टि से है- अ) मिश्र वाक्य आ) सरल वाक्य इ) संयुक्त वाक्य ई) सामान्य वाक्य ​...
English, 4 months ago
2. During the war, many people lost their homes. A. SVO B. SVIODO C. ASVO​...
English, 8 months ago
what do you like to you gather a family?​
Chemistry, 8 months ago
Resistance of 0.2 M solution of an electrolyte is 50 ????. The specific conductance of the solution is 1.3 S m⁻¹. If resistance of the 0.4 M solution of the same electrolyte is 260 ????, its molar conductivity is : (a) 6.25 × 10⁻⁴ S m² mol⁻¹ (b) 625 × 10⁻⁴ S m² mol⁻¹ (c) 62.5 S m² mol⁻¹ (d) 6250 S m² mol⁻¹...
Chemistry, 11 months ago
The second ionization enthalpy of Ca is higher than first and yet calcium forms CaCl_{2} and not CaCl, why?
Geography, 11 months ago
what is absolute humidity...
Chemistry, 11 months ago
The skeletal structure of CH_{3}COOH as shown below is correct, but some of the bonds are shown incorrectly. Write the correct Lewis structure for acetic acid.