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Tenth Grade (Grade 10) Chemistry Questions

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Grade 10 Acids and Bases
Which of the following represents an acid-base neutralization reaction?
  1. [math]AgCl + Na rarr NaCl + Ag[/math]
  2. [math]CH_3COOH + CH_3CH_2OH rarr CH_3COOCH_3CH_2 + H_2O[/math]
  3. [math]2H_3PO_4 + 6LiOH rarr 2Li_3PO_4 + 6H_2O[/math]
  4. None of the above
Grade 10 Bonds and Mixing
Covalent bonds result from:
  1. The sharing of equal numbers of electrons by two atoms
  2. The exchange of equal numbers of electrons by two atoms
  3. The combination of two atoms of the same valence
  4. Sharing of unequal numbers of electrons by two atoms
Grade 10 Bonds and Mixing
The strongest and most stable chemical bonds are
  1. Covalent bonds
  2. Ionic bonds
  3. Hydrogen bonds
  4. They are all of equal strength
Grade 10 Macromolecules
Which of the following statements about water is FALSE?
  1. Water molecules are polar
  2. It takes very little heat to change the temperature of water
  3. All living organisms contain water
  4. None of these are false
Grade 10 Atomic Structure
The chemical properties of an atom and the types of bonds it may make are primarily determined by the number of:
  1. Neutrons it has in its nucleus
  2. Protons it has in its nucleus
  3. Energy levels it has
  4. Electrons it has in its outermost energy level
Grade 10 Bonds and Mixing
In ionic bonds,
  1. Electrons are shared unequally between atoms
  2. Electrons are shared equally between atoms
  3. Neutrons are transferred between atoms
  4. Electrons are transferred between atoms
Grade 10 Acids and Bases
Grade 10 Macromolecules
An enzyme speeds up a reaction by                               .
  1. absorbing energy
  2. lowering the activation energy
  3. raising the activation energy
  4. releasing energy
Grade 10 Periodic Table and Elements
Grade 10 Macromolecules
Of what are nucleic acids made?
  1. Sugars
  2. Fatty acids
  3. Nucleotides
  4. Amino Acids
Grade 10 Periodic Table and Elements
Which of the following statements can be used to describe an element correctly?
  1. a pure substance
  2. matter of one type of atom
  3. can be broken down
  4. all of the above
  5. only a and c
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