Question:
The eutectic point in the \(SiO_2-Na_2O\) phase diagram occurs at
The eutectic point in the \(SiO_2-Na_2O\) phase diagram occurs at
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A eutectic point is the lowest melting temperature point in a binary phase diagram.
Updated On: May 7, 2026
- \(1200^\circ C\)
- \(1590^\circ C\)
- \(1390^\circ C\)
- \(790^\circ C\)
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The Correct Option is D
Solution and Explanation
Concept:
A eutectic point is the lowest melting point composition in a binary phase diagram where liquid transforms into two solid phases simultaneously.
Step 1: The system given is: \[ SiO_2-Na_2O \]
Step 2: In this binary system, the eutectic point occurs at a relatively low temperature compared with pure silica melting temperature.
Step 3: The given options include \(790^\circ C\), which is the eutectic temperature for the given system. Therefore, the eutectic point occurs at: \[ \boxed{790^\circ C} \]
Step 1: The system given is: \[ SiO_2-Na_2O \]
Step 2: In this binary system, the eutectic point occurs at a relatively low temperature compared with pure silica melting temperature.
Step 3: The given options include \(790^\circ C\), which is the eutectic temperature for the given system. Therefore, the eutectic point occurs at: \[ \boxed{790^\circ C} \]
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