1. Joimee scratched herself when her arm bumped into the concrete post. What do you think should she apply to make her bruises free from harmful germs?

A. Formalin
B. Isopropyl alcohol
C. Water
D. Acetone

2. Which organic compound is used as a cleaning agent?

A. Gasoline
B. Liquefied Petroleum Gas (LPG)
C. Kerosene
D. Ethyl alcohol

3. Which hydrocarbon compound has a triple bond in the molecule?

A. Octane
B. Methane
C. Ethene
D. Ethyne

4. Which among the following shows that an atom is stable?

A. Having 2 valence electrons
B. Having 4 valence electrons
C. Having 6 valence electrons
D. Having 8 valence electrons

5. The following are representative particles of matter. Which among them represents a covalent compound?

A. Atom
B. Ion
C. Molecule
D. Particle unit​