4. Carbon and compounds

How many bonds will a C atom form?

• 1

• 2

• 3

• 4

Which consists of carbon atoms?

• graphite
• diamond
• fullerene
• all of these

Which is used as a cutting tool and in jewelry?

• graphite
• diamond
• fullerene
• none of these

This is an example of a

• straight carbon chain

• branched carbon chain

• carbon ring structure

• None of these

Cation is formed when

• Atom gains electrons

• Atom loses electrons

• Proton is lost by the atom

• Atom shares electrons

Covalent bonds

• has low melting and boiling point

• are generally poor conductors of electricity

• has weak inter-molecular forces

• All of the above

Covalent compounds

• have high melting and boiling point

• are mostly soluble in water

• are formed between atoms of metals and non-metals

• are formed by the sharing of electrons in the bonding atoms.

Which of the following is an alkyne?

• C₃H₆

• C₄H₆

• C₅H₁₂

• C₆H₁₂

How many carbon atoms in propene?

• 8

• 7

• 6

• 3

What is the percentage of carbon on Earth's atmosphere?

• 0.429%

• 21.21%

• 0.03%

• 5.5%