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- 1. Multiple Choice
Pure substances are classified into elements and compounds. Elements are the simplified form of matter. Which of the following is an element?
Carbon monoxide
Germanium
Glucose
Nitrous oxide
- 2. Multiple Choice
Which of the following is the simplest form of substance?
solution
compound
element
mixture
- 3. Multiple Choice
When one or more substance is combined it is called __________________.
compound
element
mixture
solution
- 4. Multiple Choice
Which of the following statements describes an element?
It contains only one kind of atom.
It can be decomposed by ordinary chemical means.
It is composed of atoms of two or more elements that bond together.
It has unique properties that are different from the properties of its individual elements.
- 5. Multiple Choice
Which of the following statements describes a compound?
It contains only one kind of atom.
It can be separated by physical means.
It cannot be decomposed into simpler types of substances.
It consists of atoms of two or more different elements bond together.
- 6. Multiple Choice
Methane is a colorless odorless gas compound. Given the structure, what elements compose the methane?
Helium and Carbon
Helium and Calcium
Hydrogen and Carbon
Hydrogen and Calcium
- 7. Multiple Choice
A Grade 7 student planned to have an experiment. He prepared the materials namely sodium bicarbonate, hydrogen peroxide, iodine, and iron. Which of these materials are compounds?
Sodium bicarbonate and hydrogen peroxide
Sodium bicarbonate and iodine
Hydrogen peroxide and iodine
Hydrogen peroxide and iron
- 8. Multiple Choice
Which of the following is NOT a compound?
Monosodium glutamate
Sodium chloride
Citric acid
Krypton
- 9. Multiple Choice
What elements made up the compound Carbon dioxide?
Carbon and Oxide
Carbon and Oxygen
Carbon and Hydrogen
Carbon and Carbon
- 10. Multiple Choice
Which of the following statements is true about the illustrations below?
Illustrations I and IV are elements; Illustrations II and III are compounds.
Illustrations II and III are elements; Illustrations II and IV are compounds.
Illustrations I and II are elements; Illustrations III and IV are compounds.
Illustrations III and IV are elements; Illustrations I and II are compounds.
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