no
21. What type of hydrocarbon is composed of chains of carbon atoms?
a. Aliphatic hydrocarbon
b. aromatic hydrocarbon
c. Alkanes
d. alkynes

22. What is the study of the formation, synthesis, and properties of compounds that do not contain carbon?
a. Inorganic chemistry
b. organic chemistry
c. analytical chemistry
d. biochemistry

23. Which of the following statement is INCORRECT?
a. Chemistry is divided into organic and inorganic chemistry,
b. There are two simple forms of hydrocarbon namely aliphatic and aromatic hydrocarbon.
c. Hydrocarbons can either have a single, double, or triple bond.
d. Properties of metals such as calcium is one of the focus of organic chemistry.

24. Which of the following statements best describes organic compounds?
a. Organic compounds are compounds that contain carbon and oxygen only.
b. Organic compounds are compounds that are produced by living things.
Organic compounds are composed mainly of carbon and hydrogen.
d. Organic compounds are compounds that contain carbon atom only.
25. How do carbon atoms form organic compounds?
a. By attracting other elements toward themselves to form the bonds.
b. By forming many bonds with other carbon atoms and other elements.
By sharing their electrons with other metal and non-metal elements.
d. By transferring their electrons to the atom of the surrounding elements.​