\Answer/

1. A. Carbon
2. A. Carbon, Hydrogen and Oxygen
3. D. Liquefied Petroleum Gas, kerosene
4. A. Butyne
5. D. Single covalent bonds only

\Explanation/

1.) organic compound, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.

2.) Main elements found in most organic compounds are Carbon, Hydrogen and Oxygen.

3.) Liquefied Petroleum Gas, kerosene are highly flammable because it contains a high amount of flammable chemicals.

4.) Butyne is a terminal alkyne, with the first three carbon atoms in the chain adopting a linear shape because of the triple bond.

5.) Alkanes, or saturated hydrocarbons, contain only single covalent bonds between carbon atoms.

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1. A
2. B
3. A
4. D
5. C

Explaination:

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