JEE Main 2022 · 26 Jun · Shift 2 · Chemistry Q69

ChemistrySingle correct+4 / -1Question 69 of 90

The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?

Ce (At. No. 58)

La (At. No. 57)

Lu (At. No. 71)

Gd (At. No. 64)

Answer and worked solution

Official answer: A

Ce ( $4f^15d^16s^2$ ) readily reaches the noble-gas-like Ce $^{4+}$ ( $4f^0$ ), so it leaves +3 easily.

(A)

Topics:Lanthanoids

JEE Main 2022 · 26 Jun · Shift 2, Chemistry question 69