Question

Nano materials not applied in

• A. Manufacturing of scratch proof glasses
• B. Electronic devices
• C. Conventional water treatment
• D. self cleaning material

Hint:

Nano materials suit special uses like glass coatings, electronics and self cleaning surfaces.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Nano materials have particles of 1-100 nm. Their size gives them unusual strength, optical and electrical properties, so they are used in speciality applications.

Step 2: Detailed Explanation:
Scratch-proof glass uses nano coatings, so (A) is an application.
Electronic devices use nano scale transistors and quantum dots, so (B) is an application.
Self-cleaning materials use nano titanium dioxide coatings, so (D) is an application.
Conventional water treatment relies on ordinary processes such as sedimentation, filtration and chlorination, without nano materials.

Step 3: Final Answer:
Option (C) is the one where nano materials are not applied.

Final Answer:
Conventional water treatment does not use nano materials. \[ \boxed{\text{(C) }\text{Conventional water treatment}} \]