QA5 G8

How many bonds will a C atom form?

• 1

• 2

• 3

• 4

Carbon atoms can form many different compounds.

• TRUE

• FALSE

Which has a 2D hexagonal layered structure?

• graphite
• diamond
• fullerene
• all of these

Which has every carbon atom covalently bonded to four other atoms?

• graphite
• diamond
• fullerene
• none of these

Define the term allotropes

• Atoms with same proton number but different number of neutrons
• Atoms with same proton number but different mass number
• Atoms in different arrangement in structure
• Atoms in different arrangement and different physical form

Which has a more clearly defined shape?

• amorphous solid

• crystalline solid

(a)   is a chemical process in which incomplete combustion of certain solids containing carbon takes place when they are subjected to high heat.

What is the chemical formula of disilane?

• Si₃H₆

• Si₂H₆

• Si₄H₆

• Si₂H₈

How many isotopes does a carbon atom have?

• 12

• 13

• 14

• 15

Which of the following is not a crystalline allotrope of carbon?

• diamond

• graphite

• coal

• none of these