SCITECS: Chemistry Quizzes

C

A beaker with 100 mL of water is placed on a hot plate and heated. The water boils at 100°C. At what temperature would 90 mL of water boil? a) 10°C b) 90°C c) 100°C d) 110°C

A

A biomolecule that carries genetic information - includes DNA and RNA a) Nucleic Acid b) Monosaccharide c) lipid d) Protein

B

A biomolecule that is often an enzyme to speed up chemical reactions in cells. Made from amino acids. a) Nucleic Acid b) Protein c) Biomolecules d) lipid

D

A biomolecule that is used for energy and made up of sugars (monosaccharides). a) Biomolecules b) Nucleic Acid c) Protein d) Carbohydrate

A

A biomolecule that is used for energy storage and insulation/protection. Made of triglycerides. a) lipid b) Monomer c) Carbohydrate d) Monosaccharide

A

An example of compound is a) Salt (NaCl) b) Sodium (Na) c) chlorine (Cl) d) Fluorine (Fe)

B

Choose the response that includes all the items listed below that are pure substances. i. Seven-Up® ii. steam iii. ocean water iv. oxygen v. vegetable soup a) i, iii, v b) ii, iv c) i, iii, iv d) iv only e) all of them are pure

F

Collagen is an example of __________. a) carbohydrate b) fat c) lipid d) enzyme e) nucleic acid f) protein

False

Condensation plastics such as styrofoam, plastic bags, and PVC are difficult to biodegrade. True False

True

Condensation polymerization releases small molecules such as water and ammonia. True False

D

Large, carbon-based molecule formed by monomers a) Carbohydrate b) Monosaccharide c) Protein d) Polymer

C

Molecular subunit of a polymer a) Polymer b) Monosaccharide c) Monomer d) Amino Acid

D

Molecule that makes up proteins; composed of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur a) Polymer b) Carbohydrate c) Lipid d) Amino Acid

Sodium Carbonate Decahydrate

Name the compound: Na2CO3 · 10H2O

Strontium Sulfate

Name the compound: SrSO4

False

Natural polymers are human-made polymers. True False

A

O2(g) (oxygen) can be classified as a(n) ___________. i. element ii. compound iii. homogenous substance iv. homogenous mixture v. colloid vi. can degrade to form O a) i, iii, and vi b) none of the choices c) i and iii d) ii and iv e) ii, iii, and vi f) i, ii, iii and iv g) i, iv, and v

E

Of the following which is NOT a contribution of Marie Curie? a) She suggested the term "radioactivity." b) Her scientific studies were awarded a Nobel Prize in chemistry. c) Her scientific studies were awarded a Nobel Prize in physics. d) Discovered two new elements e) She discovered the Law of Conservation of Mass.

C

Of the following which is NOT an example of a mixture? a) gasoline b) sea water c) antimony d) air e) brass f) sand

False

PVA is stronger than super glue. True False

C

Rutherford's experiment with alpha particle scattering by gold foil established that a) electrons have a positive charge. b) protons are 1840 times heavier than electrons. c) protons are not evenly distributed throughout an atom. d) atoms are made of protons, neutrons, and electrons. e) electrons have a negative charge.

B

The building blocks of carbohydrates - a simple sugar a) Nucleic Acid b)Monosaccharide c) Protein d) Amino Acid

B

The scientist who determined the magnitude of the electric charge of the electron was a) Henry Moseley. b) Robert Millikan. c) J. J. Thomson. d) John Dalton. e) R. Chang.

False

There are no polymers in our bodies because if there were, they would kill us. True False

False

Using a cathode ray tube, J. J. Thomson determined the magnitude of the electric charge on the electron. true false

B

What are the two different ions present in the compound FeCl 3? a) Fe +, Cl - b) Fe 3+, Cl - c) Fe 2+, Cl 3 - d) Fe +, Cl - e) Fe 3+, Cl 3-

Vulcanization

What do you call the process in cross-linking rubber molecules by heating with sulfur?

B, D, F

What elements (atoms) are in lipids? Pick all answers that apply. a) Phosophorus b) Hydrogen c) Nitrogen d) Carbon e) Sulfur f) Oxygen

A, D, E

What elements (atoms) make up carbohydrates? Pick all answers that apply. a) Oxygen b) Phosphorus c) Nitrogen d) Hydrogen e) Carbon f) Sulfur

A, B, C, D, F

What elements (atoms) make up nucleic acids? Pick all answers that are correct. a) Nitrogen b) Oxygen c) Hydrogen d) Phosphorus e) Sulfur f) Carbon

C

What happens to water molecules during boiling process? a) They move faster and remain close as they absorb heat. b) They move more slowly but move further apart as they lose heat. c) They move faster and move further apart as they absorb heat. d) None of the above.

D

What is a compound? a) a compound is a substance made up of two or more substances. b) a compound is a substance made up of one kind of mixture. c) a compound is a substance made up of one kind of element. d) a compound is a substance made up of two or more elements

+2

What is the charge for a Magnesium ion?

E

What is the correct formula for xenon hexafluoride? a) XF 6 b) Xe 6F 6 c) X 6F d) Xe 6F e) XeF 6

NH4 1+

What is the formula [formula] and charge for an ammonium ion?

CO3 2-

What is the formula for a carbonate ion?

E

What is the formula for nonane? a) C 10H 20 b) C 8H 18 c) C 9H 22 d) C 9H 24 e) C 9H 20

E

What is the formula for the ionic compound containing calcium ions and oxide ions? a) Ca 2O b) CaO 3 c) CaO 2 d) Ca 3O e) CaO

D

What is the law of conservation of mass? a) Gravity and mass have the same meaning. b) Mass can be destroyed but only when it is conserved. c) Mass can never be changed to energy. d) Matter can be neither created nor destroyed. e) Mass and volume will always be equal.

Polyvinyl Acetate (PVA)

What is the major polymer found in glue?

Hydroxide

What is the name for the following ion? OH-

Potassium Nitrate

What is the name of the following compound? KNO3

Chloroethene

What is the name of the monomer of PVC (polyvinyl chloride) which is usually used in making plastic pipes?

Lactic Acid

What is the name of the monomer used to create the polymer used in dissolvable stitches?

Mg

What is the symbol for Magnesium?

D

What type of substance is always made up of a single type of atom? a) mixture b) solution c) compound d) element

A, B, C

What would be some reasons polymers are used in manufacturing? Check all that apply. a) They are rigid and strong b) They can bend and stretch c) they can be molded easily d) they are too expensive to be practical

B

When J. J. Thomson discovered the electron, what physical property of the electron did he measure? a) its mass, m b) its charge-to-mass ratio, e/m c) its atomic number, Z d) its temperature, T e) its charge, e

False

When a beam of alpha particles passes between two electrically charged plates, the beam is deflected toward the positive plate. true false

B

When salt dissolves in water, the result is a -------- a) Gas b) Homogenous mixture c) Compound d) Heterogeneous mixture

A, B, C, D, F

Which elements (atoms) make up Proteins? Pick all answers that are correct. a) Carbon b) Hydrogen c) Oxygen d) Nitrogen e) Phosphorus f) Sulfur

D

Which is an example of a pure substance? a) peanut b) air c) milk d) gold

A

Which is the formula for lead(IV) chloride? a) PbCl 4 b) PbCl 3 c) Pb 4Cl d) Pb 2Cl 4 e) PbCl 2

E

Which listing provides the three common types of radiation that can be produced by the decay of radioactive substances like uranium? a) Delta, beta, gamma rays b) Alpha, sigma, pi rays c) Delta, beta, pi rays d) Alpha, beta, pi rays e) Alpha, beta, gamma rays

B

Which of the following IS NOT a good definition of a polymer? a) a substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together, b) a molecular structure that is made up from a singular unit c) a substance made by chemical synthesis d) a group of monomers bonded together

C, D, F

Which of the following are examples of Natural polymers? (Check all that apply) a) polystyrene, silicone, polyethylene b) neoprene, nylon, styrofoam c) wool, amber, keratin d) silk, rubber, cellulose e) rayon, spandex, polyester f) collagen,starch, DNA

A, D, E

Which of the following are examples of Synthetic polymers? (Check all that apply) a) rayon, spandex, polyester b) wool, amber, keratin c) silk, rubber, cellulose d) polystyrene, silicone, polyethylene e) neoprene, nylon, styrofoam f) collagen, starch, DNA

E

Which of the following is an accurate definition of a pure substance? a) A pure substance must be made of only one element b) A pure substance must be a solid at room temperature c) A pure substance will be transparent d) A pure substance is matter that cannot be broken down into other matter e) A pure substance is matter that has a definite composition

C

Which of the following is an element? a) sugar(C6H12O6) b) salt(NaCl) c) Iron (Fe) d) water(H2O)

E

Which of the following is an example of a physical property? a) corrosiveness of sulfuric acid b) toxicity of cyanide c) flammability of gasoline d) neutralization of stomach acid with an antacid e) lead becomes a liquid when heated to 601oC

B

Which of the following is an extensive property? i. density ii. length iii. cost per unit iv. melting point a) i. b) ii. c) iii. d) iv. e) ii and iii f) i and ii g) iii and iv h) i and iv i) i and iii j) ii and iv

A

Which of the following is true of a compound? a) A compound is a substance composed of atoms of two or more elements chemically united in a fixed ratio. b) A compound is a substance that cannot be separated into simpler substances by chemical means. c) A compound is combination of two or more substances in which the substances retain their distinct identities. d) A compound must be heterogeneous. e) A compound must be a solid at room temperature.

A

Which of the following is true of a mixture? a) A mixture is a combination of two or more substances in which the substances retain their distinct identities. b) A mixture is a substance that cannot be separated into simpler substances by chemical means. c) A mixture is a substance composed of atoms of two or more elements d) A mixture must be homogeneous e) A mixture must be heterogeneous

A

Which of the following scientists developed the nuclear model of the atom? a) Ernest Rutherford b) J. J. Thomson c) Henry Moseley d) John Dalton e) Robert Millikan

A, C, D

Which of the following terms describe polymers? (all that apply) a) made up of repeating units called monomers b) all polymers are rigid c) natural d) synthetic

D

Which pure substance is made up of more that one element? a) sodium b) carbon c) gold d) water

A

Which scientist is credited with suggesting the name "radioactivity" to describe the spontaneous emission of particles and/or radiation? a) Marie Curie b) Ernst Rutherford c) Johannes Geiger d) Raymond Chang e) J.J. Thomson

C

Why are we able to eat sodium and chlorine in a compound? a) Sodium reacts violently with water b) Sodium is a metal c) The compound is harmless d) Chlorine is a poisonous gas

SF6

Write chemical formula for the following molecular compound: sulfur hexafluoride

Chromium (III) Oxide

Write name for the following ionic compound: Cr2O3

Ca(OH)2

Write the formula for calcium hydroxide.

triglyceride

animal fat

peptide bond

bond that links the monomers of protein

DNA

double stranded polymer of a nucleic acid molecule

storage and transport

function of the nucleic acid

phospholipid

makes up the cell membrane

polysaccharide

many sugar molecules bonded together

glycerol

monomer of a lipid that is the "head" of a polymer

fatty acid

monomer of a lipid that is the carbon chain of the polymer

nucleotide

monomer of a nucleic acid

amino acid

monomer of a protein

muscle building

one function of a protein

polypeptide

polymer of a protein

enzymes

protein that is a "catalyst" (house chemical reactions) in the body

Carbohydrate

quick energy

RNA

single stranded polymer of a nucleic acid

monosaccharide

single sugar molecule

lipid

stored energy

disaccharide

two sugar molecules bonded together

True

All plastics are polymers, but not all polymers are plastics. True False

glucose

Amylose and amylopectin are made-up of repeating units of which monomer?

C

In a cathode ray tube a) electrons pass from the anode to the cathode. b) protons pass from the anode to the cathode. c) electrons pass from the cathode to the anode. d) protons pass from the cathode to the anode.

D

A molecule (chemical compound) that is important for life. Most contain C, H, and O, and are polymers of smaller subunits. a) Protein b) Carbohydrate c) lipid d) Biomolecules

B

A monomer could best be described as a) a chain of polymers b) a micromolecule that can be bonded to other identical molecules c) a small unit that is a macromolecule

True

A pure yellow crystalline substance, when heated in a vacuum, releases a greenish gas and a red powder. Is the original yellow crystalline substance a compound? True False

True

Addition polymerization is initiated by a free radical. True False

E

All of the following are properties of tin. Which one is a chemical property of tin? a) Tin can be hammered into a thin sheet. b) At -40°C a sheet of tin crumbles to a gray powder. c) Tin melts at 231.9°C. d) When a bar of tin is bent, it emits an audible "cry". e) Tin erodes when added to hydrochloric acid, and a clear gas forms.

D

Give the formula for cobalt(II) chlorate dihydrate. a) CoCl 2·2H 2O b) Co(ClO 3) 2(H 2O) 2 c) CoClO 3(H 2O) 2 d) Co(ClO 3) 2·2H 2O e) Co 2(ClO 3) 3·2H 2O

NiSO3

Give the formula for nickel(II) sulfite. a) Ni 2SO 4 b) NiS 2 c) NiSO d) NiSO 3 d) Ni 2(SO 3)

Centrifugation; Density is the property

How to separate blood components? What physical property is exploited?