Composition of glass and its uses

Which one is the correct pair for basic properties of glass

• Transparent and waterproof

• Soft but brittle

• Waterproof and not transparent

Fused silica glass is made from silica ________________ adding any other chemical

• With

• Without

Lead,Pb replaces ____________ to produce glass that is____________ and_____________.

• Harder

• Calcium

• Helium

• Softer

• Denser

Glass does not conduct electricity in all circumstances

• Transparent

• Easy to recycle

• Electrical insulator

• Hard but brittle

The largess glass building in the world

• Crystal Cathedral

• Eiffel Tower

• Burj Khalifah

Silica requires temperature which is about____________ C to melting.

• 8100

• 1080

• 1008

• 1800

Bottle,blub and window mirror

• Fused silica glass

• Soda lime glass

• Borosilicate glass

• Lead crystal glass

Composition of borosilicate glass

• Sodium oxide

• Lead ii oxide

• Boron oxide

• Silica

Rainbow Skywalk is a bridge built of

• Concrete

• Glass

• Wood

• Ceramic

Christ Cathedral build by

• Philip Johnson

• Thomas Edison

• John Burgee

• Alexander Graham Bell