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Nitriding is a process of hardening stee...

Nitriding is a process of hardening steel by treating it inan atmosphere of

A

`NH_(3)`

B

`H_(2)S`

C

`N_(2)`

D

`O_(3)`

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The correct Answer is:
A
The process of producing a hard coating of iron nitride on surface of steel is called nitrding. To achieve this, steel is heated in the atmosphere of dry `NH_(3)` at `500 - 600^(@)C` for about 3 to 4 days when a hard coating of iron nitride is produced on the surface.
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Nitriding is a process of heating steel in atmosphere of :

Assertion : Nitriding is the process of heating steel in presence of N_(2) to form iron nitrides. Reason : The surface of steel becomes hard after nitriding process.

Write the balanced chemical equations for the following reactions and identify the type of reaction in case. Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.

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