The Question is from neet-chemistry , and it was created by the author A.RAMA NAGESWARARAO

Question

Red hot steel rod on suddenly immersing in water becomes:

A.RAMA NAGESWARARAO · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [B]
## CONCEPT FRAMEWORK
	**Primary Concept**: Heat treatment of metals, specifically quenching.
	**Related Topics**: Material properties like hardness, brittleness, ductility, and malleability.
	**Prerequisites**: Basic understanding of material science and heat treatment processes.
## SOLUTION PATHWAY
**Given Information**:
	* Red hot steel rod
	* Sudden immersion in water (quenching)
**Method & Steps**:
	1. Understanding the process: Rapid cooling (quenching) of steel causes a change in its microstructure.
		Reasoning: Rapid cooling prevents the steel from achieving a stable, soft structure.
		Formula/Rule: N/A
	2. Resulting Material Properties: Rapid cooling results in a hard but brittle material
		Working:  The rapid cooling traps carbon atoms in the crystal lattice, resulting in a very strong but brittle structure. 
		Key Point: This process is often used to increase the hardness of steel but also makes it more prone to fracture.
	3. Final step: Identify the option that correctly describes the resulting material properties.
		Result: The steel becomes hard and brittle.
		Verification: Common knowledge in material science.
 ## OPTION ANALYSIS
[A] :x:  Soft and malleable are characteristics of annealed steel, which is the opposite of quenched steel.
[B] ✓:  Hard and brittle is the correct outcome of quenching a red-hot steel rod.
[C] :x:  Tough and ductile are properties of steel that has been heat-treated differently, not quenched.
[D] :x: Fibrous is not a typical property associated with heat-treated steel.
 ## LEARNING AIDS
	**Common Mistakes**:
		1.[Error 1]: Confusing quenching with annealing (slow cooling). [How to avoid]: Remember that quenching is rapid cooling and annealing is slow cooling.
		2.[Error 2]: Confusing hardness with toughness. [How to avoid]: Hardness is resistance to indentation, while toughness is resistance to fracture.
	**Quick Tips**:
		1.[Helpful shortcut]: Think of quenching as a process that 'locks' the steel into a hard, brittle state.
		2.[Memory aid]: Remember that water quenching makes the steel 'hard' like 'rock'.

A.RAMA NAGESWARARAO · Answer

Soft and malleable

A.RAMA NAGESWARARAO · Answer

The correct Option is "Hard and brittle"

A.RAMA NAGESWARARAO · Answer

Tough and ductile

A.RAMA NAGESWARARAO · Answer

Fibrous

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