[amp_mcq option1=”Quartz and mica” option2=”Sand and silicates” option3=”Salt and quartz” option4=”Sand and salt” correct=”option2″]<\/p>\n
The correct answer is: B. Sand and silicates.<\/p>\n
Glass is an amorphous solid, meaning that it does not have a regular crystal structure. It is made by melting silica (silicon dioxide) and other materials, such as soda ash and lime, at high temperatures. The molten mixture is then cooled rapidly, which prevents it from crystallizing.<\/p>\n
Silica is the main component of glass, making up about 70% of its weight. It is a hard, brittle material that is found in sand and quartz. Soda ash and lime are added to the silica to lower its melting point and make it easier to work with. They also help to make the glass more durable.<\/p>\n
Other materials may be added to glass to give it different properties. For example, lead oxide is added to make lead crystal, which is a type of glass that is very clear and has a high refractive index. Boron oxide is added to make borosilicate glass, which is a type of glass that is resistant to thermal shock.<\/p>\n
Glass is a versatile material that is used in a wide variety of applications. It is used to make windows, bottles, dishes, and other objects. It is also used in the construction industry, the automotive industry, and the electronics industry.<\/p>\n","protected":false},"excerpt":{"rendered":"
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