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

AnswerExplanations
21 Which element is present in every organic compound?
(1) carbon     (3) nitrogen
(2) fluorine     (4) oxygen		1carbon =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		4conservation 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		3electrolysis 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		2redox
25 Which substance is an Arrhenius base?
(1) CH3OH     (3) LiOH
(2) CH3Cl       (4) LiCl		3base =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.		4Acids 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		3acids 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		2H+ 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		3radiation 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		1alpha 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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