January 2018 Chemistry Regents Questions 11-20 Question Preview (ID: 59756)


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.

Which statement describes the changes that occur as the oxygen molecule is produced?
a) Energy is absorbed as bonds are broken.
b) Energy is absorbed as bonds are formed.
c) Energy is released as bonds are broken.
d) Energy is released as bonds are formed.

Which term represents the strength of the attraction an atom has for the electrons in a chemical bond?
a) electrical conductivity
b) electronegativity
c) first ionization energy
d) specific heat capacity

Compared to a 15-gram sample of Cu(s) at 25°C, a 25-gram sample of Cu(s) at 25°C has
a) the same density and the same chemical properties
b) the same density and different chemical properties
c) a different density and the same chemical properties
d) a different density and different chemical properties

Which substance can not be broken down by a chemical change?
a) ammonia
b) ethanol
c) tungsten
d) water

The kinetic molecular theory states that all particles of an ideal gas are
a) colliding without transferring energy
b) in random, constant, straight-line motion
c) arranged in a regular geometric pattern
d) separated by small distances relative to their size

Which sample of gas at STP has the same number of molecules as 6 liters of Cl2(g) at STP?
a) 3 liters of O2(g)
b) 6 liters of N2(g)
c) 3 moles of O2(g)
d) 6 moles of N2(g)

A chemical reaction is most likely to occur when the colliding particles have the proper
a) energy and orientation
b) solubility and density
c) ionic radii and mass
d) atomic radii and volume

The energy absorbed and the energy released during a chemical reaction are best represented by a
a) cooling curve
b) heating curve
c) kinetic energy diagram
d) potential energy diagram

A catalyst increases the rate of a chemical reaction by
a) providing an alternate reaction pathway
b) providing the required heat of reaction
c) increasing the potential energy of the products
d) increasing the activation energy of the reaction

Which formula represents an alkyne?
a) CnHn
b) C2nHn
c) CnH2n+2
d) CnH2n-2

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