1
JEE Main 2022 (Online) 30th June Morning Shift
Numerical
+4
-1
Change Language

In the following brown complex, the oxidation state of iron is +_____________.

$${[Fe{({H_2}O)_6}]^{2 + }} + NO \to \mathop {{{[Fe{{({H_2}O)}_5}(NO)]}^{2 + }}}\limits_{\text{Brown complex}} + {H_2}O$$

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2
JEE Main 2022 (Online) 30th June Morning Shift
Numerical
+4
-1
Change Language

Spin only magnetic moment ($$\mu$$s) of $${K_3}[Fe{(CN)_6}]$$ is ____________ B.M.

(Nearest integer)

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3
JEE Main 2022 (Online) 28th June Evening Shift
Numerical
+4
-1
Change Language

$${[Fe{(CN)_6}]^{4 - }}$$

$${[Fe{(CN)_6}]^{3 - }}$$

$${[Ti{(CN)_6}]^{3 - }}$$

$${[Ni{(CN)_4}]^{2 - }}$$

$${[Co{(CN)_6}]^{3 - }}$$

Among the given complexes, number of paramagnetic complexes is ____________.

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4
JEE Main 2022 (Online) 28th June Evening Shift
Numerical
+4
-1
Change Language

(a) CoCl3.4NH3,    (b) CoCl3.5NH3,      (c) CoCl3.6NH3    and    (d) CoCl(NO3)2.5NH3.

Number of complex(es) which will exist in cis-trans form is/are _______________.

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