January 2020 Chemistry Regents Questions 11-20 Question Preview (ID: 59698)

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Which substance can not be broken down by chemical means?

a) aluminum

b) ammonia

c) aluminum oxide

d) ammonium chloride

Which statement describes the particles of an ideal gas, based on the kinetic molecular theory?

a) There are attractive forces between the particles.

b) The particles move in circular paths.

c) The collisions between the particles reduce the total energy of the gas.

d) The volume of the gas particles is negligible compared with the total volume of the gas.

What is the amount of heat released by 1.00 gram of liquid water at 0°C when it changes to 1.00 gram of ice at 0°C?

a) 4.18 J

b) 273 J

c) 334 J

d) 2260 J

Which term identifies a type of intermolecular force?

a) covalent bonding

b) hydrogen bonding

c) ionic bonding

d) metallic bonding

Which statement describes a reaction at equilibrium?

a) The mass of the products must equal the mass of the reactants.

b) The entropy of the reactants must equal the entropy of the products.

c) The rate of formation of the products must equal the rate of formation of the reactants.

d) The number of moles of the reactants must equal the number of moles of the products.

Entropy is a measure of

a) accuracy

b) precision

c) the disorder of a system

d) the attraction of a nucleus for an electron

Systems in nature tend to undergo changes toward

a) lower energy and less randomness

b) higher energy and less randomness

c) lower energy and greater randomness

d) higher energy and greater randomness

Which organic prefix is matched with the number of carbon atoms that it represents?

a) hept-, 7

b) non-, 8

c) pent-, 3

d) prop-, 4

Which terms represent two types of organic reactions?

a) sublimation and deposition

b) sublimation and fermentation

c) saponification and deposition

d) saponification and fermentation

Which class of organic compounds has molecules with this functional group?

a) aldehydes

b) esters

c) ketones

d) organic acids

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