June 2010 Chemistry Regents #21-30

Highlight to reveal answers and explanations

Back to Regents Exams

 

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 65-68 Questions 69-71 Questions 72-75 Questions 76-79 Questions 80-83

 

Questions

Answer Explanations
21 A molecule of an organic compound contains at least one atom of
(1) carbon    (3) nitrogen
(2) chlorine   (4) oxygen
1 organic = carbon
22 In a chemical reaction, the difference between the potential energy of the products and the potential energy of the reactants is equal to the
(1) activation energy
(2) entropy of the system
(3) heat of fusion
(4) heat of reaction
4 definition of heat of reaction or delta H
23 A carbon-carbon triple bond is found in a molecule of
(1) butane      (3) butene
(2) butanone  (4) butyne
4 -yne contain triple bonds (Table Q)
24 Which statement describes one characteristic of an operating electrolytic cell?
(1) It produces electrical energy.
(2) It requires an external energy source.
(3) It uses radioactive nuclides.
(4) It undergoes a spontaneous redox reaction.
2 electrolytic is Nonspontaneous and requires electricity
25 Which compound when dissolved in water is an Arrhenius acid?
(1) CH3OH    (3) NaCl
(2) HCl           (4) NaOH
2 Arrhenius acids start with H
26 An acid can be defined as an
(1) H+ acceptor    (3) OH- acceptor
(2) H+ donor        (4) OH- donor
2 Acids donate H+

Bases accept it

27 Which nuclear emission has no charge and no mass?
(1) alpha particle   (3) gamma ray
(2) beta particle    (4) positron
3 gamma Table O
28 During which process can 10.0 milliliters of a 0.05 M HCl(aq) solution be used to determine the unknown concentration of a given volume of NaOH(aq) solution?
(1) evaporation    (3) filtration
(2) distillation       (4) titration
4 Definition of a titration
4 Use  Table N
30 Which reaction is accompanied by the release of the greatest amount of energy?
(1) combustion of 10. g of propane
(2) electrolysis of 10. g of water
(3) nuclear fission of 10. g of uranium
(4) oxidation of 10. g of iron
3 Always Nuclear E=mc2

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 65-68 Questions 69-71 Questions 72-75 Questions 76-79 Questions 80-83

 
Back to Regents Exams