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Byju's Answer

Standard XII

Chemistry

Magnetic Moment Examples

In the manufa...

Question

In the manufacture of iron, a gas (A) is formed in the zone of combustion of the blast furnace. The gas (A) reacted with coke in the zone of fusion to form another gas (B). X moles of (B) reacts with iron at $200^{o}$ C and 100 atm pressure to form a compound (C).

The magnetic moment and effective atomic number of the C respectively are :

4.93 and 36

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0 and 36

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0 and 34

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Solution

The correct option is A 0 and 36
$F e + 5 C O 200^{o} C \to 100 a t m F e (C O)_{5}$

$F e = [A r] 3 d^{6} 4 s^{2}$

$C O$ is a strong ligand. So, pairing occurs in $F e (C O)_{5}$

Effective atomic number= $26 + 10 = 36$

The magnetic moment is zero due to the lack of an unpaired electron.

So, the correct option is $B$

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Similar questions

In the manufacture of iron, a gas (A) is formed in the zone of combustion of the blast furnace. The gas (A) reacted with coke in the zone of fusion to form another gas (B). X moles of (B) reacts with iron at

200^{o}

C and 100 atm pressure to form a compound (C).

The d orbital(s) involved in the formation of the complex (C) will be:

A

and

B

are two ores of copper.

A

undergoes calcination to form a solid,

C O_{2 (g)}

and

O_{2 (g)}

B

undergoes roasting to form a solid and a gas

C

which turns acidified

K_{2} C r_{2} O_{7}

to green solution.

B

also reacts with dil

H C l

to form a solid and gas

D

which turns lead acetate solution black.

D

also reacts with

C

to form colloidal sulphur in the presence of moisture.

The nature of the gas (

D

) and hybridization of the central atom is respectively:

Question 33
Write a balanced chemical equation for each of the following reactions and also classify them.

(a) Lead acetate solution is treated with dilute hydrochloric acid to form lead chloride and acetic acid solution.

(b) A piece of sodium metal is added to absolute ethanol to form sodium ethoxide and hydrogen gas.

(d) Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water.

A

and

B

are two ores of copper.

A

undergoes calcination to form a solid,

C O_{2 (g)}

and

O_{2 (g)}

B

undergoes roasting to form a solid and a gas

C

which turns acidified

K_{2} C r_{2} O_{7}

to green solution.

B

also reacts with dil

H C l

to form a solid and gas

D

which turns lead acetate solution black.

D

also reacts with

C

to form colloidal sulphur in the presence of moisture.

The copper ores

A

and

B

respectively are:

Q. A substance A reacts with another substance B to produce the product C and a gas D. If a mixture of the gas D and ammonia is passed through an aqueous solution of C, baking soda is formed. The substances A and B are:

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The correct option is A 0 and 36Fe+5CO200oC→100atmFe(CO)5Fe=[Ar]3d64s2CO is a strong ligand. So, pairing occurs in Fe(CO)5Effective atomic number= 26+10=36The magnetic moment is zero due to the lack of an unpaired electron.So, the correct option is B