Answer:
1. C
2. B
Explanation:
1. A hydrocarbon is composed of only two atoms: hydrogen and carbon. Carbon dioxide (CO₂) is composed of carbon and oxygen. Hydroxide (OH⁻) and water (H₂O) are composed of hydrogen and oxygen, In the choices, only methane (CH₄) is a hydrocarbon.
2. A way to find out the type of hydrocarbon is by looking at its suffix.
Alkane - (no. of carbon)-ane
Alkene - (no. of carbon)-ene
Alkyne - (no. of carbon)-yne
In this question, we are finding which is NOT an alkene.
A. Propene - yes, an alkene
B. Butane - no, an alkane
C. Pentene - yes, an alkene
D. Ethene - yes, an alkene
