August 2019 Chemistry Regents Questions 21-30 Question Preview (ID: 59715)


Use Your Knowledge Of Chemistry To Answer All Questions In The Data Set. You Will Need Your Chemistry Reference Tables And A Calculator To Answer Some Of The Questions. Good Luck. TEACHERS: click here for quick copy question ID numbers.

In terms of disorder and energy, systems in nature have a tendency to undergo changes toward
a) less disorder and lower energy
b) less disorder and higher energy
c) greater disorder and lower energy
d) greater disorder and higher energy

The only two elements in alkenes and alkynes are
a) carbon and nitrogen
b) carbon and hydrogen
c) oxygen and nitrogen
d) oxygen and hydrogen

Which functional group contains a nitrogen atom and an oxygen atom?
a) ester
b) ether
c) amide
d) amine

When a sample of Mg(s) reacts completely with O2(g), the Mg(s) loses 5.0 moles of electrons. How many moles of electrons are gained by the O2(g)?
a) 1.0 mol
b) 2.5 mol
c) 5.0 mol
d) 10.0 mol

Which statement describes the reactions in an electrochemical cell?
a) Oxidation occurs at the anode, and reduction occurs at the cathode.
b) Oxidation occurs at the cathode, and reduction occurs at the anode.
c) Oxidation and reduction both occur at the cathode.
d) Oxidation and reduction both occur at the anode.

A 0.050 M aqueous solution of which compound is the best conductor of electric current?
a) C3H7OH
b) C6H12O6
c) MgSO4
d) K2SO4

What is the color of bromcresol green indicator in a solution with a pH value of 2.0?
a) blue
b) green
c) red
d) yellow

Which formula can represent hydrogen ions in an aqueous solution?
a) OH-(aq)
b) Hg2^2+(aq)
c) H3O+(aq)
d) NH4+(aq)

In which reaction is an atom of one element converted into an atom of another element?
a) combustion
b) fermentation
c) oxidation-reduction
d) transmutation

In which type of nuclear reaction do nuclei combine to form a nucleus with a greater mass?
a) alpha decay
b) beta decay
c) fusion
d) fission

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