A hydrocarbon substituent is called an

It’s called An alkyl group.

Aliphatic hydrocarbons are divided into three main groups according to the types of bonds they contain: alkanes, alkenes, and alkynes. Alkanes have only single bonds, alkenes contain a carbon-carbon double bond, and alkynes contain a carbon-carbon triple bond.

liquid 1 and 2 have the same color and mass so the answer would be liquid 1 and 2

Explanation:

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