MCQ
Which of the following has highest electrode potential
- A$Li$
- B$Cu$
- ✓$Au$
- D$Al$
✓
Answer
Correct option: C.
$Au$
c
$\text { Element: } \quad\quad\quad\quad\quad\quad Be \quad\quad\quad Mg \quad\quad Ca \quad\quad\quad Sr \quad\quad\quad Ba$
$\text { Element: } \quad\quad\quad\quad\quad\quad Be \quad\quad\quad Mg \quad\quad Ca \quad\quad\quad Sr \quad\quad\quad Ba$
$\text { Electrode potential : }-1.70 \quad-2.37\quad -2.87\quad -2.89 \quad -2.90$
$Be$ has the highest electrode potential as it is the least electropositive among the given metals.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Consider the dissociation of the weak acid $\mathrm{HX}$ as given below
→$\mathrm{HX}(\mathrm{aq}) \rightleftharpoons \mathrm{H}^{+}(\mathrm{aq})+\mathrm{X}(\mathrm{aq}), \mathrm{Ka}=1.2 \times 10^{-5}$
$\left[\mathrm{K}_{\mathrm{n}}:\right.$ dissociation constant]
The osmotic pressure of $0.03 \mathrm{M}$ aqueous solution of $\mathrm{HX}$ at $300 \mathrm{~K}$ is ............... $\times 10^{-2}$ bar (nearest integer).
$\left[\right.$ Given : $\mathrm{R}=0.083 \mathrm{~L} \mathrm{bar} \mathrm{Mol}^{-1} \mathrm{~K}^{-1}$ ]
Identify compound $(\mathrm{Z})$ in the following reaction sequence.
→Nitrolim is
Which reagent will bring about the conversion of carboxylic acids into esters
In which of the following reaction $SN^1$ reaction takes place ?
→Assertion : Reimer-Tiemann reaction of phenol with $CCl_4$ in $NaOH$ at $340\, K$ gives salicylic acid as the major product.
Reason : The reaction occurs through intermediate formation of dichlorocarbene.
→Reason : The reaction occurs through intermediate formation of dichlorocarbene.
The reagent which easily reacts with ethanol and propanol is
The product obtained is
For gold plating, the electrolyte used is
In the given reaction $[A]$ and $[B]$ respectively be :
→