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Tenth Grade (Grade 10) Chemistry Questions

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Grade 10 Biochemical Pathways
                is the total of all the chemical reactions an organism needs to survive.
  1. Metabolism
  2. Catabolism
  3. Anabolism
  4. Chemistry
Grade 10 Acids and Bases
Which of the following represents an acid-base neutralization reaction?
  1. AgCl+Na→NaCl+Ag
  2. CH3COOH+CH3CH2OH→CH3COOCH3CH2+H2O
  3. 2H3PO4+6LiOH→2Li3PO4+6H2O
  4. None of the above
Grade 10 Reactions
An endothermic reaction                                                   .
  1. absorbs heat from the environment
  2. releases heat from the environment
  3. is when two substances interact and create bubbles
  4. none of the above
Grade 10 Molecules and Compounds
Which is the correct formula for aluminum oxide?
  1. Al2O
  2. AlO3
  3. Al3O2
  4. Al2O3
Grade 10 Macromolecules
What type of macromolecules are the enzymes found in our bodies?
  1. lipids
  2. carbohydrates
  3. proteins
  4. nucleic acids
Grade 10 Molecules and Compounds
The mass of one mole of a substance is called                  .
  1. molecular mass
  2. molar mass
  3. total mass
  4. none of the above
Grade 10 Atomic Structure
Which is the electron configuration of a neutral atom with a total of six valence electrons?
  1. 1s22s22p2
  2. 1s22s22p4
  3. 1s22s22p6
  4. 1s22s22p63s23p6
Grade 10 Acids and Bases
Acidic solutions contain high concentrations of                .
  1. hydrogen ions
  2. hydroxide ions
  3. water
  4. oxygen
Grade 10 Periodic Table and Elements
The atomic number of an atom is always equal to
  1. the number of neutrons
  2. the number of electrons
  3. the number of protons
  4. the number of protons plus neutrons
Grade 10 Periodic Table and Elements
The number of protons in the nucleus of the atoms of an element determines the element's
  1. mass number.
  2. atomic number.
  3. ion charge.
  4. atomic mass.
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
Grade 10 Reactions
An exergonic (spontaneous) reaction is a chemical reaction that                                                         .
  1. is common in anabolic pathways
  2. cannot occur outside of a living cell
  3. occurs only when an enzyme or other catalyst is present
  4. releases energy when proceeding in the forward direction
Grade 10 Bonds and Mixing
A bond formed by the attraction between oppositely charged ions is called a(n)                       .
  1. polar covalent bond
  2. ionic bond
  3. metallic bond
  4. nonpolar covalent bond
Grade 10 Macromolecules
Nucleotides are the building blocks of proteins.
  1. True
  2. False
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