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Ninth Grade (Grade 9) Molecules and Compounds Questions

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Grade 9 Molecules and Compounds
Sodium chloride, water, and carbon dioxide are common compounds. Given the descriptions below:

A. Makes up 70 percent of Earth's surface
B. Forms from a metal and a nonmetal
C. A dense gas at room temperature
D. Commonly found in all three states of matter

Which of the following correctly identifies each substance above?
  1. A describes sodium chloride, B and C describe water, and D describes carbon dioxide.
  2. A and B describe water, B describes carbon dioxide, and D describes sodium chloride.
  3. A and D are water, B is sodium chloride, and C is carbon dioxide.
  4. None of the above
Grade 9 Molecules and Compounds
PO3-4 is named
  1. acetate.
  2. phosphate.
  3. perchlorate.
  4. phosphonium.
Grade 9 Molecules and Compounds
C2H3O-2 is named
  1. acetate.
  2. oxalate.
  3. hydroxide.
  4. carbonate.
Grade 9 Molecules and Compounds
The attraction of water molecules to other kinds of molecules is called                     .
  1. adhesion
  2. cohesion
  3. capillary action
  4. transpirational pull
Grade 9 Molecules and Compounds
C2O2-4 is named
  1. oxalate.
  2. peroxide.
  3. hydroxide.
  4. carbonate.
Grade 9 Molecules and Compounds
Water consists of atoms that cannot be broken down chemically.
  1. True
  2. False
Grade 9 Molecules and Compounds
Which of the following would be an example of a polar molecule?
  1. water
  2. wax
  3. oil
  4. sand
Grade 9 Molecules and Compounds
Polymers are present in the human body.
  1. True
  2. False
Grade 9 Molecules and Compounds
Choose the correct description of a non polar molecule.
  1. A molecule with no charge
  2. A molecule at the far end of something
  3. A molecule in the middle of something
  4. A molecule with a slight charge
Grade 9 Molecules and Compounds
Which of the following choices is a non-polar molecule?
  1. water
  2. sugar
  3. oil
  4. salt
Grade 9 Molecules and Compounds
ClO-4 is named
  1. chlorite.
  2. chlorate.
  3. perchlorate.
  4. hypochlorite.
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