Q1: Which of the following is resistant to the action of both heat & chemicals ?

ANS:A - Boro silicate glass,

Borosilicate glass is resistant to the action of both heat and chemicals. Explanation:

1. Borosilicate Glass: Borosilicate glass is a type of glass that contains significant amounts of boron trioxide, typically between 5% and 13% by weight. This addition of boron trioxide imparts unique properties to borosilicate glass, making it highly resistant to thermal shock and chemical corrosion.
2. Resistance to Heat: Borosilicate glass has a low coefficient of thermal expansion, which means it can withstand rapid changes in temperature without cracking or shattering. This property makes it ideal for applications where exposure to high temperatures is common, such as laboratory glassware, cookware, and lighting components.
3. Resistance to Chemicals: Borosilicate glass also exhibits excellent resistance to the action of various chemicals, including acids, bases, and organic solvents. This chemical resistance makes it suitable for use in laboratory settings, where glassware may come into contact with corrosive substances during experiments or analyses.
4. Comparison with Other Types of Glass:
   • Silica Glass: While silica glass (also known as fused quartz) is resistant to high temperatures, it is not as resistant to chemical corrosion as borosilicate glass.
   • Soda Lime Glass: Soda lime glass, which is the most common type of glass used in everyday products like windows, bottles, and containers, is not as resistant to heat or chemical corrosion as borosilicate glass.
5. Applications: Due to its exceptional resistance to heat and chemicals, borosilicate glass finds applications in a wide range of industries, including laboratory and scientific research, pharmaceuticals, chemical processing, and household products.