June 2002 Regents 11-20

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


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Answer Explanations
11 Which of the following atoms has the greatest tendency to attract electrons?

(1) barium         (3) boron
(2) beryllium      (4) bromine

4 Definition of Electronegativity

Table J


12 Which 5.0-milliliter sample of NH3 will take the shape of and completely fill a closed 100.0-milliliter container?

(1) NH3(s)        (3) NH3(g)
(2) NH3(
)        (4)NH3(aq)

3 Gases complete fill a closed container.
13 The strongest forces of attraction occur between molecules of

(1) HCl        (3) HBr
(2) HF         (4) HI


2 Forces of Attraction + Hydrogen Compounds=

H-Bonding Questions

HF, NH3, H2O

14 Which graph shows the pressure-temperature relationship expected for
an ideal gas?


1 Direct Relationship

P        T         V

15 At the same temperature and pressure, which sample contains the same
number of moles of particles as 1 liter of O2(g)?

(1) 1 L Ne(g)      (3) 0.5 L SO2(g)
(2) 2 L N2(g)       (4) 1 L H2O(


1 Avagodros Hypothesis

Different Gases, at the same conditions 

Same volumes; Same # of Molecules

16 Which change in the temperature of a 1-gram sample of water would
cause the greatest increase in the average kinetic energy of its molecules?

(1) 1C to 10C          (3) 50C to 60C
(2) 10C to 1C          (4) 60C to 50C



3 Definition of Temperature

(Average Kinetic Energy)

17 Which compound is classified as a hydrocarbon?

(1) ethane         (3) chloroethane
(2) ethanol        (4) ethanoic acid


1 Hydrocarbon- Hydrogen and carbon only


1 Oxidation the ox. Number increases

Don't even worry about electrons in this question.

19 Which formula is an isomer of butane?

4 Definition-Isomer, same formula different structure

Butane-4 carbons all single bonded to hydrogen





20 Which particles are gained and lost during a redox reaction?

(1) electrons     (3) neutrons
(2) protons      (4) positrons

1 Redox-electrons transfer, oxidation numbers change

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

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