January 2008 Chemistry Regents #21-30

Highlight to reveal answers and explanations

 

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

Other Regents Exams

Questions	Answer	Explanations
21 Which energy conversion occurs in a voltaic cell? (1) chemical energy to electrical energy (2) chemical energy to nuclear energy (3) electrical energy to chemical energy (4) nuclear energy to electrical energy	1	voltaic cells are batteries
22 Which metal is more active than Ni and less active than Zn? (1) Cu (3) Mg (2) Cr (4) Pb	2	Table J
23 As water is added to a 0.10 M NaCl aqueous solution, the conductivity of the resulting solution (1) decreases because the concentration of ions decreases (2) decreases, but the concentration of ions remains the same (3) increases because the concentration of ions decreases (4) increases, but the concentration of ions remains the same	1	concentration decreases so does coductivity
24 Which substance is an Arrhenius acid? (1) Ba(OH)2          (3) H3PO4 (2) CH3COOCH3 (4) NaCl	3	Starts with H
25 Which compound releases hydroxide ions in an aqueous solution? (1) CH3COOH    (3) HCl (2) CH3OH          (4) KOH	4	The one with a metal and OH never organic
26 Which reaction converts an atom of one element to an atom of another element? (1) combustion        (3) saponification (2) polymerization   (4) transmutation	4	definition of transmutation
27 Which nuclear emission has the greatest mass? (1) alpha particle   (3) gamma ray (2) beta particle     (4) positron	1	alpha than beta and positron and no mass with gamma
	1	Table N
29 Which list of nuclear emissions is arranged in order from the least penetrating power to the greatest penetrating power? (1) alpha particle, beta particle, gamma ray (2) alpha particle, gamma ray, beta particle (3) gamma ray, beta particle, alpha particle (4) beta particle, alpha particle, gamma ray	1	least (alpha, beta, gamma) most
30 One benefit of nuclear fission reactions is (1) nuclear reactor meltdowns (2) storage of waste materials (3) biological exposure (4) production of energy	4	benefit is a good thing