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Physical & Chemical Changes Solutions Library

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72 solutions

Physical & Chemical Changes

Q. A physical change:A. occurs when iron rustsB. occurs when sugar is heated into caramelC. occurs when glucose is converted into energy within your c...

Solved • Sep 15, 2019

Physical & Chemical Changes

Q. Physical or Chemical?:A) Frost forms as the temperature drops on a humid winter night.B) A cornstalk grows from a seed that is watered and fertiliz...

Solved • Aug 29, 2019

Physical & Chemical Changes

Q. Which of the following is a chemical change?A) boiling of waterB) melting waxC) broiling a steak on a grillD) condensing water vapor into rainfallE...

Solved • Aug 29, 2019

Physical & Chemical Changes

Q. Select the best statement.A) Chemical changes provide the only valid basis for identification of a substance.B) Chemical changes are easily reverse...

Solved • Aug 29, 2019

Physical & Chemical Changes

Q. Select the best statement.A) Physical changes may be reversed by changing the temperature.B) Physical changes alter the composition of the substanc...

Solved • Aug 29, 2019

Physical & Chemical Changes

Q. Which of the following is a chemical reaction?a) The melting of ice.b) The formation of a covalent bond between two amino acids.c) Making a hydroge...

Solved • Aug 29, 2019

Physical & Chemical Changes

Q. Is evaporation a chemical reaction?

Solved • Aug 25, 2019

Physical & Chemical Changes

Q. Is water boiling a chemical reaction?

Solved • Aug 25, 2019

Physical & Chemical Changes

Q. Which of these changes are physical and which are chemical? Explain.(a) Plants make sugar from carbon dioxide and water.(b) Water vapor in the air ...

Solved • Oct 25, 2018

Physical & Chemical Changes

Q. The images below show molecules undergoing changes (where each sphere represents an atom and each color represents a different element in a molecul...

Solved • Oct 25, 2018

Physical & Chemical Changes

Q. The density of copper decreases as temperature increases (as does the density of most substances). Which change occurs in a sample of copper when ...

Solved • Oct 25, 2018

Physical & Chemical Changes

Q. We put a drop of water into a container and seal the container. The drop of water then vaporizes.Does the mass of the sealed container change upon ...

Solved • Oct 25, 2018

Physical & Chemical Changes

Q. We put a drop of water into a container and seal the container. The drop of water then vaporizes.Does its contents change upon vaporization?

Solved • Oct 25, 2018

Physical & Chemical Changes

Q. Classify each of the following changes as physical or chemical.a. Natural gas burns in a stove.b. The liquid propane in a gas grill evaporates beca...

Solved • Oct 25, 2018

Physical & Chemical Changes

Q. Which of the following are chemical changes? Which are physical changes?f. DNA unwinding

Solved • Oct 17, 2018

Physical & Chemical Changes

Q. The volume of a sample of oxygen gas changed from 10 mL to 11 mL as the temperature changed. Is this a chemical or physical change?

Solved • Oct 15, 2018

Physical & Chemical Changes

Q. Scenes A and B depict changes in matter at the atomic scale:Which result(s) in a change in state?

Solved • Oct 12, 2018

Physical & Chemical Changes

Q. Scenes A and B depict changes in matter at the atomic scale:Which show(s) a physical change?

Solved • Oct 12, 2018

Physical & Chemical Changes

Q. The scenes below illustrate two different mixtures. When mixture A at 273 K is heated to 473 K, mixture B results.How many different physical chang...

Solved • Oct 12, 2018

Physical & Chemical Changes

Q. Define physical property and chemical property. Identify type of property in the following statement:  • A magnet separates a mixture of black iron...

Solved • Oct 12, 2018

Physical & Chemical Changes

Q. Which of the following changes can be reversed by changing the temperature: (a) dew condensing on a leaf (b) an egg turning hard when it is boiled(...

Solved • Oct 9, 2018

Physical & Chemical Changes

Q. Choose the chemical property. (a) Ethanol boils at 78°C. (b) The compound C2H6O has a density of 0.789 g/mL at 20°C. (c) Acetylene, C2H2, burns in ...

Solved • Aug 23, 2018

Physical & Chemical Changes

Q. Which of the following is a chemical change? A. dissolving salt in water B. boiling water C. cutting a diamond D. crumpling paper E. hydrogen perox...

Solved • Aug 23, 2018

Physical & Chemical Changes

Q. Which of the following is a chemical change? 1) boiling of water 2) condensing water vapor into rainfall 3) melting wax 4) carving a piece of wood ...

Solved • Aug 22, 2018

Physical & Chemical Changes

Q. Which of these occurrences are due to physical changes, and which are due to chemical changes? 

Solved • Jun 18, 2018

Physical & Chemical Changes

Q. Which of the following will result in a chemical change? a. Burning coal in a furnace b. Drying wood in a shed c. Evaporating alcohol into vapor d....

Solved • Apr 2, 2018

Physical & Chemical Changes

Q. Which of the following are chemical changes? Check all that apply.a. water is boiledb. gasoline is evaporatedc. gasoline is burnedd. water is heate...

Solved • Mar 23, 2018

Physical & Chemical Changes

Q. Which of the following is a chemical change?a. Metallic Sodium dulls when exposed to Air.b. Tearing of a piece of cloth.c. Sand is filtered from Se...

Solved • Mar 23, 2018

Physical & Chemical Changes

Q. Which of the following is not a physical change?a. Metallic Sodium dulls when exposed to Air.b. Tearing of a piece of cloth.c. Sand is filtered fro...

Solved • Mar 23, 2018

Physical & Chemical Changes

Q. Label each transition in this flowchart as a chemical change or a physical change.

Solved • Mar 7, 2018

Physical & Chemical Changes

Q. Classify the following as physical or chemical change: a) Melting a sugar cube    b) Iron that rusts c) Burning a sugar cube d) Dissolving salt...

Solved • Jul 3, 2017

Physical & Chemical Changes

Q. Circle the corresponding letter to indicate whether the following is a chemical (C) or physical (P) change.  a) Rusting of a bicycle b) Vinegar h...

Solved • Jun 15, 2017

Physical & Chemical Changes

Q. Indicate whether the following is a physical or chemical change. a. Over time, liquid water in an open container evaporates and becomes a vapor in...

Solved • Apr 20, 2017

Physical & Chemical Changes

Q. Which of the following are examples of a chemical change? a. Copper building materials develop a green patina over time. b. a match burns c. eth...

Solved • Oct 28, 2016

Physical & Chemical Changes

Q. Which of the following is a physical change? A. Milk sours when left out of the refrigerator B. Wood is burned on a stove C. Tums (containing CaCO...

Solved • Sep 22, 2016

Physical & Chemical Changes

Q. Which of the following is a chemical change?A. Sugar dissolves in waterB. Solid CO2 is shattered with a hammerC. Ice undergoes fusion to form liqui...

Solved • Sep 19, 2016

Physical & Chemical Changes

Q. Which of the following is a chemical change? a. oil burns on a heating element. b. water forms dew on a leaf. c. Ice undergoes fusion to form li...

Solved • Aug 9, 2016

Physical & Chemical Changes

Q. Classify following as physical or chemical changes. d. Chemistry majors sometimes get holes in the cotton jeans they wear to lab because of acid sp...

Solved • Jul 19, 2016

Physical & Chemical Changes

Q. Classify following as physical or chemical changes. c. A French chef making a sauce with brandy is able to burn off the alcohol from the brandy, le...

Solved • Jul 19, 2016

Physical & Chemical Changes

Q. Classify following as physical or chemical changes. b. Hydrofluoric acid attacks glass, and is used to etch calibration marks on glass laboratory u...

Solved • Jul 19, 2016

Physical & Chemical Changes

Q. Classify following as physical or chemical changes.a. Moth balls gradually vaporize in a closet.

Solved • Jul 19, 2016

Physical & Chemical Changes

Q. Give four examples illustrating each of the following terms.f. chemical change

Solved • Jul 18, 2016

Physical & Chemical Changes

Q. Give four examples illustrating each of the following terms.e. physical change

Solved • Jul 18, 2016

Physical & Chemical Changes

Q. If you place a glass rod over a burning candle, the glass appears to turn black. What is happening to each of the following (physical change, chemi...

Solved • Jul 18, 2016

Physical & Chemical Changes

Q. If you place a glass rod over a burning candle, the glass appears to turn black. What is happening to each of the following (physical change, chemi...

Solved • Jul 18, 2016

Physical & Chemical Changes

Q. If you place a glass rod over a burning candle, the glass appears to turn black. What is happening to each of the following (physical change, chemi...

Solved • Jul 18, 2016

Physical & Chemical Changes

Q. You may have noticed that when water boils, you can see bubbles that rise to the surface of the water.b. Is the boiling of water a chemical or phys...

Solved • Jul 18, 2016

Physical & Chemical Changes

Q. You may have noticed that when water boils, you can see bubbles that rise to the surface of the water.a. What is inside these bubbles?i. airii. hyd...

Solved • Jul 18, 2016

Physical & Chemical Changes

Q. A match is lit and held under a cold piece of metal. The following observations are made: (a) The match burns. (b) The metal gets warmer. (c) Water...

Solved • Jun 29, 2016

Physical & Chemical Changes

Q. Label each of the following as either a physical process or a chemical process: (e) exploding of nitroglyerin. 

Solved • Jun 29, 2016

Physical & Chemical Changes

Q. Label each of the following as either a physical process or a chemical process:  (d) digesting a candy bar. 

Solved • Jun 29, 2016

Physical & Chemical Changes

Q. Label each of the following as either a physical process or a chemical process: (c) pulverizing an aspirin. 

Solved • Jun 29, 2016

Physical & Chemical Changes

Q. Label each of the following as either a physical process or a chemical process: (b) boiling a cup of water.

Solved • Jun 29, 2016

Physical & Chemical Changes

Q. Label each of the following as either a physical process or a chemical process: (a) rusting of a metal can.

Solved • Jun 29, 2016

Physical & Chemical Changes

Q. Label each of the following as either a physical process or a chemical process:  (b) melting of ice. 

Solved • Jun 29, 2016

Physical & Chemical Changes

Q. Label each of the following as either a physical process or a chemical process: (a) corrosion of aluminum metal. 

Solved • Jun 29, 2016

Physical & Chemical Changes

Q. Does the following diagram represent a chemical or physical change? How do you know? [Section 1.3] 

Solved • Jun 28, 2016

Physical & Chemical Changes

Q. Based on the molecular diagram, classify each change as physical or chemical.  

Solved • May 20, 2016

Physical & Chemical Changes

Q. Based on the molecular diagram, classify each change as physical or chemical.  

Solved • May 20, 2016

Physical & Chemical Changes

Q. Based on the molecular diagram, classify each change as physical or chemical.  

Solved • May 20, 2016

Physical & Chemical Changes

Q. What is the difference between a physical change and a chemical change? 

Solved • May 19, 2016

Physical & Chemical Changes

Q. Which natural process tends to change the free nitrogen of the air into "fixed" nitrogen?a) lightning stormsb) photosynthesisc) respiration of anim...

Solved • May 10, 2016

Physical & Chemical Changes

Q. A chemical change A) occurs when methane gas is burned. B) occurs when paper is shredded. C) occurs when water is vaporized. D) occurs when sal...

Solved • Apr 7, 2016

Physical & Chemical Changes

Q. A physical change A) occurs when iron rusts. B) occurs when sugar is heated into caramel. C) occurs when glucose is converted into energy within...

Solved • Apr 7, 2016

Physical & Chemical Changes

Q. Which of the following are examples of a chemical change? A) coffee brewing B) water boiling C) leaves turning color in the fall D) salt dissol...

Solved • Apr 7, 2016

Physical & Chemical Changes

Q. Which of the following are examples of a chemical change? A) Copper building materials develop a green patina over time. B) a match burns C) eth...

Solved • Apr 7, 2016

Physical & Chemical Changes

Q. Which of the following are examples of physical change? A) dew forms on a blade of grass B) a halloween light stick glows after shaking C) an eg...

Solved • Apr 7, 2016

Physical & Chemical Changes

Q. Which of the following are examples of physical change? A) sugar is dissolved in water. B) coffee is brewed. C) dry ice sublimes. D) ice (solid...

Solved • Apr 7, 2016

Physical & Chemical Changes

Q. A chemical change occurs when ________. A. glucose is converted into energy within cells B. water vaporizes C. ethanol evaporates D. dew forms ...

Solved • Feb 11, 2016

Physical & Chemical Changes

Q. Which of the following describes a physical change? A. Condensation forms on a windshield B. A light stick glows after shaking C. An egg solidif...

Solved • Feb 11, 2016

Physical & Chemical Changes

Q. Which of the following is a chemical change? a. Sugar dissolves in water b. Solid CO2 is shattered with a hammer c. Ice undergoes fusion to form...

Solved • Feb 11, 2016

Physical & Chemical Changes

Q. Each of the following is an example of a chemical change EXCEPT _________. A. A bicycle rusting B. Burning toast C. Chocolate melting D. Fuel c...

Solved • Feb 11, 2016