1
WB JEE 2023
MCQ (Single Correct Answer)
+2
-0.5
Change Language

Nickel combines with a uninegative monodentate ligand (X$$^-$$) to form a paramagnetic complex [NiX$$_4$$]$$^{2-}$$. The hybridisation involved and number of unpaired electrons present in the complex are respectively

A
sp$$^3$$, two
B
dsp$$^2$$, zero
C
dsp$$^2$$, one
D
sp$$^3$$, one
2
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Sodium nitroprusside is :

A
$$N{a_4}[Fe{(CN)_5}N{O_2}]$$
B
$$N{a_2}[Fe{(CN)_5}NO]$$
C
$$N{a_3}[Fe{(CN)_5}NO]$$
D
$$N{a_4}[Fe{(CN)_5}N{O_3}]$$
3
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Choose the correct statement for the [Ni(CN)4]2$$-$$ complex ion (Atomic no. of Ni = 28)

A
The complex is square planar and paramagnetic.
B
The complex is tetrahedral and diamagnetic.
C
The complex is square planar and diamagnetic.
D
The complex is tetrahedral and paramagnetic.
4
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
A solution is made by a concentrated solution of Co(NO3)2 with a concentrated solution of NaNO2 is 50% acetic acid. A solution of a salt containing metal M is added to the mixture, when a yellow precipitate is formed. Metal 'M' is
A
magnesium
B
sodium
C
potassium
D
zinc
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