January 2009 Chemistry Regents #21-30

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51-53 Questions 54-55 Questions 56-58 Questions 59-61 Questions 62-64 Questions 65-66 Questions 67-68 Questions 69-71 Questions 72-74 Questions 75-77 Questions 78-79 Questions 80-81

 

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Questions

Answer Explanations
21 Which element is present in every organic compound?
(1) carbon     (3) nitrogen
(2) fluorine     (4) oxygen
1 carbon =organic
22 Given the balanced equation representing a reaction:
2Fe + 3Cu2+ ==>2Fe3+ + 3Cu
When the iron atoms lose six moles of electrons, how many moles of electrons are gained by the copper ions?
(1) 12 moles     (3) 3 moles
(2) 2 moles       (4) 6 moles
4 conservation of charge
23 Which statement describes electrolysis?
(1) Chemical energy is used to produce an electrical change.
(2) Chemical energy is used to produce a thermal change.
(3) Electrical energy is used to produce a chemical change.
(4) Thermal energy is used to produce a chemical change
3 electrolysis requires a power source to make a reaction occur
24 During which process does an atom gain one or more electrons?
(1) transmutation    (3) oxidation
(2) reduction          (4) neutralization
2 redox
25 Which substance is an Arrhenius base?
(1) CH3OH     (3) LiOH
(2) CH3Cl       (4) LiCl
3 base =OH-
26 Which statement describes an alternate theory of acids and bases?
(1) Acids and bases are both H+ acceptors.
(2) Acids and bases are both H+ donors.
(3) Acids are H+ acceptors, and bases are H+ donors.
(4) Acids are H+ donors, and bases are H+ acceptors.
4 Acids donate H+ bases accept them
27 Which two compounds are electrolytes?
(1) C6H12O6 and CH3CH2OH
(2) C6H12O6 and HCl
(3) NaOH and HCl
(4) NaOH and CH3CH2OH
3 acids bases or salts (ionic)
28 The only positive ion found in H2SO4(aq) is the
(1) ammonium ion   (3) hydroxide ion
(2) hydronium ion    (4) sulfate ion
2 H+ or H3O+ (hydronium)
29 Which risk is associated with using nuclear fission to produce energy in a power plant?
(1) depletion of hydrocarbons
(2) depletion of atmospheric oxygen
(3) exposure of workers to radiation
(4) exposure of workers to sulfur dioxide
3 radiation is BAD for us
30 An unstable nucleus loses the most mass if the nucleus emits
(1) an alpha particle (3) a positron
(2) a beta particle (4) a gamma ray
1 alpha is the largest

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51-53 Questions 54-55 Questions 56-58 Questions 59-61 Questions 62-64 Questions 65-66 Questions 67-68 Questions 69-71 Questions 72-74 Questions 75-77 Questions 78-79 Questions 80-81

 
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