August 2019 Chemistry Regents Questions 41-50 Question Preview (ID: 59718)

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Hydrochloric acid reacts faster with powdered zinc than with an equal mass of zinc strips because the greater surface area of the powdered zinc

a) decreases the frequency of particle collisions

b) decreases the activation energy of the reaction

c) increases the frequency of particle collisions

d) increases the activation energy of the reaction

Increasing the temperature of the system causes the concentration of

a) HI to increase

b) H2 to increase

c) HI to remain constant

d) H2 to remain constant

Based on Table I, which equation represents a reaction with the greatest difference between the potential energy of the products and the potential energy of the reactants?

a) 4Al(s) + 3O2(g) → 2Al2O3(s)

b) 2H2(g) + O2(g) → 2H2O(l)

c) C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)

d) C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(l)

Which phase change results in an increase in entropy?

a) I2(g) → I2(s)

b) CH4(g) → CH4(l)

c) Br2(l) → Br2(g)

d) H2O(l) → H2O(s)

What is the name of this compound?

a) methyl butanoate

b) methyl butyl ether

c) pentanone

d) pentanoic acid

During this reaction, each element changes in

a) atomic number

b) oxidation number

c) number of protons per atom

d) number of neutrons per atom

Which equation represents a spontaneous reaction?

a) Ca + Ba^2+ → Ca^2+ + Ba

b) Co + Zn^2+ → Co^2+ + Zn

c) Fe + Mg^2+ → Fe^2+ + Mg

d) Mn + Ni^2+ → Mn^2+ + Ni

Which equation represents a neutralization reaction?

a) 6HClO → 4HCl + 2HClO3

b) CH4 + 2O2 → CO2 + 2H2O

c) Ca(OH)2 + H2SO4 → CaSO4 + 2H2O

d) Ba(OH)2 + Cu(NO3)2 → Ba(NO3)2 + Cu(OH)2

Which radioisotope requires long-term storage as the method of disposal, to protect living things from radiation exposure over time?

a) Pu-239

b) Fr-220

c) Fe-53

d) P-32

Which statement explains the energy term in this reaction?

a) Mass is gained due to the conversion of mass to energy.

b) Mass is gained due to the conversion of energy to mass.

c) Mass is lost due to the conversion of mass to energy.

d) Mass is lost due to the conversion of energy to mass.

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