1. Glass is made up of ___________.

• aluminium silicate

• silica

• brass

• pewter

2. Silica is a compound that contains silicon dioxide and exists naturally in _________________.

• clay

• sand

• air

3. What are the properties of soda -lime glass?

• chemically inert

• easy to shape

• low melting point

This glass is made of silica, boron oxide, sodium oxide, aluminum oxide. What is this glass?

• fused silica glass

• borosilicate glass

• lead crystal glass

Which types of glass has high resistance to heat and chemicals compared to soda-lime glass?

• soda-lime glass

• lead crystal glass

• borosilicate glass

6. How to form glass?

• pure silica melts and liquidfies at around 1500 degree celcius

• pure silica melts and liquidfies at around 1200 degree celcius

• pure silica melts and liquidfies at around 1000 degree celcius

7. Ceramic is made up of ______________.

• sand

• clay

8. The main component of clay is _________________.

• boron silicate

• aluminium silicate

• boron oxide

• lead oxide

9. Bulb is made up of _______________.

• fused silica glass

• lead crystal glass

• soda-lime glass

10. Laboratory apparatus are made up of _________________.

• lead crystal glass

• soda-lime glass

• borosilicate glass