JEE Main 2023 Chemistry question on Redox and Electrochemistry
Which one among the following metals is the weakest reducing agent?
A.
Rb
B.
Li
C.
K
D.
Na
Show answer and solution
Correct option: D
Solution
The reducing power of alkali metals is determined by their standard reduction potentials (more negative = stronger reducing agent). Although Li has the highest charge density and releases the most energy on hydration (making its E° the most negative at –3.04 V), Na has the least negative standard reduction potential (E° = –2.71 V) among the four listed metals. Rb (–2.98 V), K (–2.93 V), and Li (–3.04 V) all have more negative potentials than Na. Therefore Na is the weakest reducing agent among Rb, Li, K, and Na.
[JEE Main 2023 · 25 Jan · Shift 2]
Practise Redox and Electrochemistry the way it is asked
A timed set of real JEE Main Redox and Electrochemistry questions, graded as the exam grades. No sign-up.
