Write short note :Properties of Glass.

1.	Write short note :Properties of Glass.
Answer» The glass becomes soft on heating and thus can be moulded into desired shape. 1. According to ingredients added at the time of preparation of glass, its density changes accordingly. 2. Glass is slow conductor of heat. If a cold glass is quickly heated, it cracks suddenly. Similarly, the warm glass if exposed to sudden cooling, it too cracks. 3. Glass is a bad conductor of electricity. Therefore, it is used as insulating material in electric appliances. 4. Glass is transparent, allowing most of light to pass through it. If there are chromium, vanadium or iron oxides in the glass, large amount of light is absorbed in glass.

Answer»

The glass becomes soft on heating and thus can be moulded into desired shape.

1. According to ingredients added at the time of preparation of glass, its density changes accordingly.

2. Glass is slow conductor of heat. If a cold glass is quickly heated, it cracks suddenly. Similarly, the warm glass if exposed to sudden cooling, it too cracks.

3. Glass is a bad conductor of electricity. Therefore, it is used as insulating material in electric appliances.

4. Glass is transparent, allowing most of light to pass through it. If there are chromium, vanadium or iron oxides in the glass, large amount of light is absorbed in glass.

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