Standard electrode potential values, $E^{{S}}$ for ${Al}^{3+} / {Al}$ is $-1.66 \mathrm{~V}$ and that of ${Tl}^{3+} / {Tl}$ is $+1.26 \mathrm{~V}$. Which of the following is incorrect regarding the given information?

${Tl}^{3+}$ is not only unstable in aqueous solution, but also a powerful oxidising agent. ${Tl}^{+}$is more stable in solution than $\mathrm{Tl}^{3+}$

${Al}$ is more electropositive than thallium

${Al}$ is able to form +3 ion easily

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JEE CHEMISTRY MCQ: 13 TH GROUP ELEMENTS (P-BLOCK)

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Analyzing +4 | -1

Standard electrode potential values,

E^{{S}}

for

{Al}^{3+} / {Al}

-1.66 \mathrm{~V}

and that of

{Tl}^{3+} / {Tl}

+1.26 \mathrm{~V}

. Which of the following is incorrect regarding the given information?

View answer and explanation

Correct option: A

{Tl}^{3+}

is a powerful reducing agent.

Option A (

{Tl}^{3+}

is a powerful reducing agent.) is incorrect because

{Tl}^{3+}

is a powerful oxidizing agent, not a reducing agent, due to its high positive standard electrode potential.

More Questions from 13 TH GROUP ELEMENTS (P-BLOCK)

Practice All Chapter MCQs →

Duralumin is an alloy of: Assertion (A) : In aqueous solution

{AlCl}_3

forms dimer

{Al}_2 {Cl}_6

.
Reason (R) : The high enthalpy of hydration is sufficient to break the covalent dimer into

\left[M\left({H}_2 {O}\right)_6\right]^{3+}

and

{Cl}^{-}

ions.

{Al}_2\left({SO}_4\right)_3

is used in the following but not Which metal will give blue colour metaborate in borax bead test? Consider the following statements about boric acid.

I. It is a weak monobasic acid

II. It is not a protonic acid

III. It acts as a lewis acid

The correct statement(s) among the following is/are The correct statements from the following are:

(A) The decreasing order of atomic radii of group 13 elements is

{Tl}>{In}>{Ga}>{Al}>{B}

(B) Down the group 13 electronegativity decreases from top to bottom

(C)

{Al}

dissolves in dil.

{HCl}

and liberate

{H}_2

but conc.

{HNO}_3

renders

{Al}

passive by forming a protective oxide layer on the surface

(D) All elements of group 13 exhibits highly stable +1 oxidation state

(E) Hybridisation of

{Al}

\left[{Al}\left({H}_2{O}\right)_6\right]^{3+}

ion is

\mathrm{sp}^3 \mathrm{d}^2

Choose the correct answer from the options given below: