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In the crystal of diamond, each carbon atom is covalently bonded to __ other carbon atoms arranged tetrahedrally around it.

THRee.

Four.

Two.

One.

Carbon dioxide is classified as a(n):

Basic oxide.

Amphoteric oxide.

Acidic oxide.

Neutral oxide.

Diamond is a non-conductor of electricity because:

There are free electrons in its crystal lattice since all of the four valence electrons are not used in bonding.

There are no free electrons in its crystal lattice since all of the four valence electrons are used in bonding.

There are no free ions in its crystal lattice since all of the three valence electrons are used in bonding.

There are no free electrons in its crystal lattice since all of the five valence electrons are used in bonding.

Which of the following is a physical property of carbon monoxide?

Colorless and odorless gas.

Reddish-brown gas.

Pungent smell.

Greenish-yellow gas.

Which property of carbon dioxide makes it useful in soft drinks?

It dissolves in water under pressure, making the drink fizzy.

It is colorless.

It is a heavy gas.

It is a reducing agent.