Concept explainers
(a)
Interpretation:
Whether the flammability of ether is a physical or a chemical property is to be stated.
Concept introduction:
The change in the physical property of a substance is known as a physical change, which is reversible in nature.
The change in the chemical property of a substance is known as a chemical change, which is irreversible in nature.
(b)
Interpretation:
Whether the reddish-orange color of bromine is a physical or chemical property is to be stated.
Concept introduction:
Chemical reactions are the rearrangement of atoms, molecules, or ions to form other chemical substances. Chemical changes are of two types: physical change and chemical change.
The change in the physical property of a substance is known as a physical change, which is reversible in nature.
The change in the chemical property of a substance is known as a chemical change, which is irreversible in nature.
(c)
Interpretation:
Whether the vaporization of ethanol is a physical or a chemical property is to be stated.
Concept introduction:
Chemical reactions are the rearrangement of atoms, molecules, or ions to form other chemical substances. Chemical changes are of two types: physical change and chemical change.
The change in the physical property of a substance is known as a physical change, which is reversible in nature.
The change in the chemical property of a substance is known as a chemical change, which is irreversible in nature.
(d)
Interpretation:
Whether the condensation of steam to water is a physical or a chemical property is to be stated.
Concept introduction:
Chemical reactions are the rearrangement of atoms, molecules, or ions to form other chemical substances. Chemical changes are of two types: physical change and chemical change.
The change in the physical property of a substance is known as a physical change, which is reversible in nature.
The change in the chemical property of a substance is known as a chemical change, which is irreversible in nature.
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EP INTRODUCTORY CHEM.-MOD.MASTERINGCHEM
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- Classify each of the following as a physical change or a chemical change. (a) Touching a lit candle to hydrogen soap bubbles gives an explosion. (b)Heating water in a flask produces moisture on the glass. (c) Combining two colorless solutions gives a yellow solid. (d) Pouring vinegar on baking soda produces gas bubbles.arrow_forwardWhich of the following is best characterized as a heterogeneous mixture? Group of answer choices (a) Air (b) Sandy Dirt (c) An aqueous solution of NaCl (d) Electrum (an alloy of gold and silver) (e) Clear Diamondarrow_forwardYou are given a hammer, a battery, a bulb, wires and switch.(a) How could you use them to distinguish between samples of metals and non- metals?(b) Asses the usefulness of these tests in distinguishing between metals and non-metals?arrow_forward
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- Select the best answer or answers from the choices given: Which of the following does not describe a mixture? (a) properties of its components are retained, (b) chemical bonds are formed, (c) components can be separated physically, (d) includes both heterogeneous and homogeneous examples.arrow_forwardWhich of the following are pure substances? Explain. (a) Calcium chloride, used to melt ice on roads, consists of two elements, calcium and chlorine, in a fixed mass ratio. (b) Sulfur consists of sulfur atoms combined into octatomic molecules. (c) Baking powder, a leavening agent, contains 26% to 30% sodium hydrogen carbonate and 30% to 35% calcium dihydrogen phosphate by mass. (d) Cytosine, a component of DNA, consists of H, C, N, and O atoms bonded in a specific arrangement.arrow_forwardClassify each change as physical or chemical. (a) the rusting of iron(b) the evaporation of fingernail-polish remover (acetone) from the skin(c) the burning of coal(d) the fading of a carpet upon repeated exposure to sunlightarrow_forward
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