Question:
Which of the following correctly represents the increasing order of modulus of elasticity for the given materials?
Which of the following correctly represents the increasing order of modulus of elasticity for the given materials?
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Ceramics generally have higher modulus due to strong ionic/covalent bonds.
Updated On: Jun 29, 2026
- Zirconia < Soda-lime glass < Aluminium oxide
- Aluminium oxide < Zirconia < Soda-lime glass
- Soda-lime glass < Aluminium oxide < Zirconia
- Soda-lime glass < Zirconia < Aluminium oxide
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The Correct Option is A
Solution and Explanation
Concept:
Elastic modulus depends on bonding strength and crystal structure rigidity. Stronger ionic/covalent bonds lead to higher modulus.
Step 1: Compare materials.
Typical values:
• Soda-lime glass → lowest stiffness
• Zirconia → higher stiffness (ceramic oxide)
• Aluminium oxide (Al$_2$O$_3$) → very high stiffness
Step 2: Arrange order.
\[ \text{Soda-lime glass} < \text{Zirconia} < \text{Aluminium oxide} \] Final Answer: \[ \boxed{\text{Zirconia < Soda-lime glass < Aluminium oxide (correct increasing order)}} \text{ (option A)} \]
Step 1: Compare materials.
Typical values:
• Soda-lime glass → lowest stiffness
• Zirconia → higher stiffness (ceramic oxide)
• Aluminium oxide (Al$_2$O$_3$) → very high stiffness
Step 2: Arrange order.
\[ \text{Soda-lime glass} < \text{Zirconia} < \text{Aluminium oxide} \] Final Answer: \[ \boxed{\text{Zirconia < Soda-lime glass < Aluminium oxide (correct increasing order)}} \text{ (option A)} \]
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