June 2023  Chemistry Regents #26-30

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26. Which statement represents neutralization?

            1. An Arrhenius acid and an Arrhenius base react to produce water and a salt.

            2. An Arrhenius acid and salt a react to produce water and n Arrhenius base.

            3. Water and an Arrhenius acid react to produce an Arrhenius base and a salt.

            4. Water and a salt react to produce an Arrhenius base and an Arrhenius acid.

 1   acid + base makes salt and water

neutralization
27. A tenfold increase in hydronium ion concentration is represented by

            1. a decrease of one unit of pH

            2. a decrease of 10 units of pH

            3. an increase of one unit of pH

            4. an increase of 10 units of pH

 1   hydronium H3O+ , produced from acids

so more acidic lower pH

10 has 1 zero, so the pH changes by one unit
28. Based on Table N, which particle is emitted by the radioactive decay of francium-220?

            1. an alpha particle

            2. a beta particle

            3. a positron

            4. a neutron

 1   Nuclear Section of the M.C.

look at decay mode which is a

then look at Table O...that is alpha

 

29. Which type or reaction releases the greatest amount of energy per kilogram of reactant?

            1. acid-base reaction

            2. fission reaction

            3. organic reaction

            4. redox reaction

 2   nuclear fission releases millions of times more energy than conventional reactions
30. Which risk is related to the radioactive isotopes used to generate electricity?

            1. depletion of fossil fuels

            2. depletion of atmospheric ozone

            3. exposure to acid rain

            4. exposure to nuclear emissions

 4   1-3 have nothing to do with nuclear energy

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-52 Questions 53-54 Questions 55-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-69 Questions 70-73 Questions 74-78 Questions 79-81 Questions 82-85

 

 

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