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Byju's Answer

Standard XII

Chemistry

Reactivity with Air CO2 and Water (Group 1)

Assertion : ...

Question

Assertion : $[F e (C O)_{5}]$ is dimagnetic complex. Reason: In the given complex oxidation state of iron is zero.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Option (B) is correct.
$[F e (C O)_{5}]$ is diamagnetic complex.It has $d^{6}$ orbital.As $C O$ is a strong ligand and due to presence of it ,electrons are paired up. Thus there is no unpaired electron, hence it is diamagnetic in nature.

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Similar questions

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Q. Assertion: The compressibility factor for

H_{2}

and

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(1 + \frac{P b}{R T})

Reason: The compressibility factor for

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H e

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Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
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Assertion :[Fe(CO)5] is dimagnetic complex. Reason: In the given complex oxidation state of iron is zero.

Assertion : $[F e (C O)_{5}]$ is dimagnetic complex. Reason: In the given complex oxidation state of iron is zero.