1
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Which of the following species exhibits both LMCT and paramagnetism?

A
$$ \mathrm{MnO}_4^{2-} $$
B
$$ \mathrm{MnO}_4^{-} $$
C
$$ \mathrm{Cr}_2 \mathrm{O}_7^{2-} $$
D
$$ \mathrm{CrO}_4^{2-} $$
2
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
A solution of NaNO3, when treated with a mixture of Zn dust and 'A' yields ammonia. 'A' can be
A
caustic soda
B
dilute sulphuric acid
C
concentrated sulphuric acid
D
sodium carbonate
3
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
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
A
copper
B
calcium
C
iron
D
zinc
4
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.33
Change Language
At room temperature, the reaction between water and fluorine produces
A
HF and H2O2
B
HF, O2 and F2O2
C
F$$-$$, O2 and H+
D
HOF and HF
WB JEE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12