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Eleventh Grade (Grade 11) Chemistry Questions

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Grade 11 Atomic Structure
Bohr's atomic model involved electrons having
  1. a fixed orbit.
  2. a changing orbit.
  3. no orbit.
Grade 11 Kinetics and Equilibrium
Which of the following is true for a chemical reaction at equilibrium?
  1. only the forward reaction stops
  2. only the reverse reaction stops
  3. both the forward and reverse reactions stop
  4. rates of both forward and reverse reactions are the same
Grade 11 Macromolecules
Which macromolecule creates alpha helix and beta sheet formations?
  1. carbohydrates
  2. lipids
  3. nucleic acids
  4. proteins
Grade 11 Molecules and Compounds
Elongate molecules with a carboxylic acid group are called                .
  1. proteins
  2. carbohydrates
  3. lipids
  4. fatty Acids
Grade 11 Macromolecules
Which statement best defines organic compounds?
  1. They are compounds that do not contain both carbon and hydrogen.
  2. They are compounds that contain lipids, proteins, and nucleic acids.
  3. They are compounds used for "quick energy."
  4. They are compounds that contain both carbon and hydrogen atoms.
Grade 11 Quantum Physics and the Atom
The strong nuclear force has several properties that determine its effect on atomic particles including all of the following EXCEPT
  1. it is only attractive, never repulsive.
  2. it acts on both charged and neutral particles.
  3. it acts on protons, neutrons, and electrons to hold the nucleus together.
  4. it is a short-range force.
Grade 11 Nuclear Chemistry
Which type of radioactive decay will only alter atomic number?
  1. alpha
  2. beta
  3. gamma
  4. (b) and (c)
Grade 11 Biochemical Pathways
What reaction occurs in the matrix of the mitochondria and includes FADH2 among its products?
  1. glycolysis
  2. Krebs cycle
  3. oxidative phosphorylation
  4. lactic acid fermentation
  5. chemiosmosis
Grade 11 Stoichiometry
Dividing a number by 22.4 converts between which two units?
  1. moles to liters
  2. mass to atoms
  3. liters to moles
  4. atoms to mass
Grade 11 Reactions
Enzymes are                       .
  1. homogenous catalysts
  2. heterogenous catalysts
  3. acid catalysts
  4. base catalysts
Grade 11 Reactions
Which of the following reactions is considered endothermic?
  1. acid neutralising alkali causing a temperature increase
  2. adding magnesium to hydrochloric acid
  3. calcium carbonate decomposing when heated
  4. combustion of fossil fuels
Grade 11 Macromolecules
Which macromolecule has a monomer known as a monosaccharide?
  1. lipids
  2. nucleic acids
  3. carbohydrates
  4. steroids
Grade 11 Macromolecules
Which statement correctly describes enzymes in general?
  1. They are made up of nucleotides.
  2. They are, with few exceptions, proteins.
  3. They are the key to life.
  4. They are hormones.
Grade 11 Bonds and Mixing
The prefix "intra-" in "intramolecular forces" means that attractive forces are
  1. within molecules.
  2. between molecules.
  3. outside of molecules.
  4. around molecules.
Grade 11 Macromolecules
The latest technique for the separation, isolation, and purification of an organic compound is                                    .
  1. chromatography
  2. distillation under reduced pressure
  3. differential extraction
  4. fractional crystallization
Grade 11 Biochemical Pathways
Which process does NOT result in the making of ATP?
  1. oxidative phosphorylation of NADH
  2. Krebs cycle
  3. lactic acid fermentation
  4. glycolysis
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