WB JEE 2025 | d and f Block Elements Question 1 | Chemistry

WB JEE 2025

MCQ (Single Correct Answer)

-0.25

The common stable oxidation states of Eu and Gd are respectively

+3 and +3

+3 and +2

+2 and +3

+2 and +2

WB JEE 2024

MCQ (Single Correct Answer)

-0.25

Identify the ion having $$4 f^6$$ electronic configuration.

Gd$$^{3+}$$

Sm$$^{3+}$$

Sm$$^{2+}$$

Tb$$^{3+}$$

WB JEE 2024

MCQ (Single Correct Answer)

-0.25

Which of the following species exhibits both LMCT and paramagnetism?

$$ \mathrm{MnO}_4^{2-} $$

$$ \mathrm{MnO}_4^{-} $$

$$ \mathrm{Cr}_2 \mathrm{O}_7^{2-} $$

$$ \mathrm{CrO}_4^{2-} $$

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

A solution of NaNO₃, when treated with a mixture of Zn dust and 'A' yields ammonia. 'A' can be

caustic soda

dilute sulphuric acid

concentrated sulphuric acid

sodium carbonate

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