Given below are two statements : Statement I: \(\mathrm{CeO}_{2}\) can be used for oxidation of aldehydes and ketones. Statement II : Aqueous solution of \(\mathrm{EuSO}_{4}\) is a strong reducing agent. In the light of the above statements, choose the correct answer from the options given below :

(B) Both Statement I and Statement II are true

(A) Statement I is true but Statement II is false

(C) Statement I is false but Statement II is true

(D) Both Statement I and Statement II are false

JEE Main · 2021 · 25 Feb 2021 · Shift 1 · d and f Block Elements

Given below are two statements :
Statement I:

CeO_{2}

can be used for oxidation of aldehydes and ketones.
Statement II : Aqueous solution of

EuSO_{4}

is a strong reducing agent.
In the light of the above statements, choose the correct answer from the options given below :

Answer: (B)

Cerium in

Ce O_{2}

is in the

+ 4

state, one step above the

+ 3

state that the lanthanoids hold most firmly, so it is reduced to

C e^{3 +}

easily and acts as an oxidising agent; it is used in this way to oxidise aldehydes and ketones. Europium in

EuS O_{4}

is in the

+ 2

state, one step below that same stable

+ 3

state, so in water it parts with an electron readily and its solutions reduce even water slowly. Both statements are true.

JEE Main · 2021 · 25 Feb 2021 · Shift 1 · Single correct option