WB JEE 2024 | d and f Block Elements Question 1 | Chemistry

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

WB JEE 2020

MCQ (Single Correct Answer)

-0.25

The reaction for obtaining the metal (M) from its oxide (M₂O₃) ore is given by

$${M_2}{O_3}(s) + 2Al(l)\buildrel {Heat} \over \longrightarrow A{l_2}{O_3}(l) + 2M(s)$$, (s = solid, l = liquid) in that case, M is

copper

calcium

iron

zinc

WB JEE Subjects