First slide

Chemical properties

Question

Statement-I: In aqueous solution, compounds of ${Ce}^{+ 4}$ are powerful oxidizing agents.
Statement-II: Initial members of Lanthanoids resemble calcium in their chemical reactivity

Moderate

A

Both statements I and II are correct
B

Statement-I is correct and statement-II is incorrect
C

Statement-I is incorrect and statement-II is correct
D

Both statements I and II are incorrect

Solution

I) $E_{{Ce}^{+ 4} / {Ce}^{+ 3}}^{o} is + 1.74 V . {Ce}^{+ 4}$ is a very strong oxidant in aqueous solution. But the rate of reactivity is very slow.
II) Initial members of Lanthanoids resemble Calcium in their reactivity.

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