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Mond's Process

A metal 'M' h...

Question

A metal 'M' has the electronic configuration 2, 8, 3 and occurs in nature as M $_{2}$ O $_{4}$ . It is more reactive than zinc. Write a chemical equation illustrating the use of this metal for joining cracked railway lines.

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Solution

The reaction of iron (III) oxide (Fe $_{2}$ O $_{3}$ ) is used to join cracked railway lines. The reaction is highly exothermic and is called thermite reaction. Iron is obtained in the molten state which fills the cracks.
$F e_{2} O_{3} I r o n (I I I) o x i d e + 2 A l A l u m i n i u m \to 2 F e (m o l t e n s t a t e) + A l_{2} O_{3} A l u m i n i u m o x i d e + H e a t$

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Q. A metal 'M' has the electronic configuration 2, 8, 3 and occurs in nature as M

_{2}

_{4}

. It is more reactive than zinc. Name the metal 'M'.

A

has electronic configuration of

2, 8, 1

and metal B has electronic configuration of

2, 8, 2

. Which metal is more reactive and why?

Q. If the electronic configuration of metal

A

is (2, 8, 7) and that of metal

B

is (2, 8. 2) then :
a. Which metal is less reactive?
b. Write the names of the two metals.
c. Write the balanced chemical equation of reaction of any one metal with hydrochloric acid.

Q. Assertion: Sodium Metal is reactive where as Sodium Ions aren't reactive.

Reason: Sodium Metal has an electronic configuration of 2, 8, 1. Sodium Ions have a configuration of 2, 8.

Metal 'M' has the electronic configuration 2, 8, 1.

(i) What is the valency of Metal 'M'?

(ii) Is it oxidizing or reducing in nature?

(iii) Give the formula of its chloride.

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