If a carbon atom is bonded to two hydrogen atoms and two carbon atoms, what type of bond must exist between the carbon atoms?

The bond between them is covalent bond.

Explanation: There are 2 types of bonds present:

1. Covalent bond: This bond is present when there is sharing of electrons between two elements. This bond is prominent in the bonding of two non-metals.

2. Ionic bond: This type of bond is formed when there is a complete transfer of electrons from one element to another element. In this bonding one element is always a metal and another is a non-metal.

We are given that a carbon atom is forming two bonds with hydrogen and rest two with carbon atoms. Carbon and hydrogen both are non-metals and hence, the bonds between them will be purely covalent in nature.

So, the bond between two carbon atoms is covalent bond.

single covalent bond

Explanation:

There are 2 broadly types of chemical bonds present:

1. Covalent bond: This bond is present when there is sharing of electrons between two elements.

2. Ionic bond: This type of bond is formed when there is a complete transfer of electrons from one element to another element. In this bonding one element is always a metal and another is a non-metal.

We are given that a carbon atom is forming two bonds with hydrogen and rest two with carbon atoms. Carbon and hydrogen both are non-metals and hence, the bonds between them will be purely covalent in nature.

Also, the valency of the carbon atom is 4. Thus, in the given case, the carbon atom is bonded to 2 hydrogen atoms and 2 carbon atoms. Thus, they all must be single bond.

Thus, there exist single covalent bond between the two carbon atoms.