January 2004 Regents #21-30

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

 

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Questions

Answer Explanations
21 The functional group —COOH is found in
(1) esters          (3) alcohols
(2) aldehydes    (4) organic acids
4 Reference Table R General Formula
22 Which of these elements is the best conductor
of electricity?
(1) S       (3) Br
(2) N      (4) Ni
4 Ni is a METAL
4 Add ox. #s

reduction charge goes down

Fe3+ --> Feo

24 Which energy transformation occurs when an
electrolytic cell is in operation?
(1) chemical energy → electrical energy
(2) electrical energy → chemical energy
(3) light energy → heat energy
(4) light energy → chemical energy
2 electrolytic requires a power source
25 Which of these pH numbers indicates the highest
level of acidity?
(1) 5      (3) 10
(2) 8      (4) 12
1 acids have low pH values
26 According to the Arrhenius theory, when a base
dissolves in water it produces
(1) CO3 2– as the only negative ion in solution
(2) OH as the only negative ion in solution
(3) NH4 + as the only positive ion in solution
(4) H+ as the only positive ion in solution
2 base OH-
27 Which compound is an electrolyte?
(1) C6H12O6    (3) CaCl2
(2) CH3OH      (4) CCl4
3 acids, bases or salts

CaCl2 is a salt

4 1 reactant

aka natural transmutation

29 The stability of an isotope is based on its
(1) number of neutrons, only
(2) number of protons, only
(3) ratio of neutrons to protons
(4) ratio of electrons to protons
3 found in the nucleus
30 As the temperature of a substance decreases, the
average kinetic energy of its particles
(1) decreases
(2) increases
(3) remains the same
1 avg. KE is Temperature

 

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

 
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