Which of the following terms means that a crystal has the ability to capture and hold water molecules? w) hydroponic x) hygroscopic y) hydrophobic z) hydropholectic

Which of the following terms means that a crystal has the ability to capture and hold water molecules? w) hydroponic x) hygroscopic y) hydrophobic z) hydropholectic
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ANSWER: X -- HYGROSCOPIC
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The ability of an atom to absorb neutrons is its neutron capture cross section. The unit of measurement for neutron capture cross section is: w) the nucleus volume x) capture capacity y) resonance quotient z) barn

Description : The ability of an atom to absorb neutrons is its neutron capture cross section. The unit of measurement for neutron capture cross section is: w) the nucleus volume x) capture capacity y) resonance quotient z) barn

Last Answer : ANSWER: Z -- BARN

The hydrocarbon end of a detergent molecule is: w) hydrophilic x) hydrophobic y) possible ionic z) contains oxygen or sulfur

Description : The hydrocarbon end of a detergent molecule is: w) hydrophilic x) hydrophobic y) possible ionic z) contains oxygen or sulfur

Last Answer : ANSWER: HYDROPHOBIC

Between the layers of phospholipids in a cell membrane, there is an area that is: a) hydrophobic (pron: high-dro-fo-bick) b) hydrophillic (pron: high-dro-fill-ick) c) hygroscopic (pron: high-grow-scop-ick) d) hygrolipic (pron: high-grow-lip-ick)

Description : Between the layers of phospholipids in a cell membrane, there is an area that is: a) hydrophobic (pron: high-dro-fo-bick) b) hydrophillic (pron: high-dro-fill-ick) c) hygroscopic (pron: high-grow-scop-ick) d) hygrolipic (pron: high-grow-lip-ick)

Last Answer : ANSWER: A -- HYDROPHOBIC

Which of the following terms denotes the polar molecules or negative ions clustered about a central positive ion? w) ligands x) isomers y) complex ions z) dipoles

Description : Which of the following terms denotes the polar molecules or negative ions clustered about a central positive ion? w) ligands x) isomers y) complex ions z) dipoles

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Description : Which of the following terms refers to the number of molecules or ions attached to a central metallic atom? w) coordination number x) connection number y) bonding number z) none of these

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Description : Which one of the following is classified as a covalent network solid crystal? w) CaO x) SiO2 y) CO2 z) Pb

Last Answer : ANSWER: B -- SiO2

What is a typical spacing between atoms in a crystal, e.g., copper or rock salt? w) 0.1 Angstroms x) 2 Angstroms y) 20 Angstroms z) 100 Angstroms

Description : What is a typical spacing between atoms in a crystal, e.g., copper or rock salt? w) 0.1 Angstroms x) 2 Angstroms y) 20 Angstroms z) 100 Angstroms

Last Answer : ANSWER: B -- 2 ANGSTROMS

Which class of solids could have London Forces the attractive forces between particles in crystal lattice positions? w) ionic x) covalent y) metallic z) molecular

Description : Which class of solids could have London Forces the attractive forces between particles in crystal lattice positions? w) ionic x) covalent y) metallic z) molecular

Last Answer : ANSWER: Z -- MOLECULAR

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Description : The type of crystal lattice exemplified in a diamo is: w) ionic crystal x) covalent network crystal y) metallic crystal z) covalent molecular crystal

Last Answer : ANSWER: X -- COVALENT NETWORK CRYSTAL

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Description : Solids may be considered to be either crystalline noncrystalline. The basic difference between them is that a crystal, in contrast to a noncrystal: w) has a sharp melting point x) has an irregular array of atoms y) exhibits double refraction z) has a completely regular atomic or molecular structure

Last Answer : ANSWER: Z -- HAS A COMPLETELY REGULAR ATOMIC OR MOLECULAR STRUCTURE

Most of the new atoms formed when atoms in a nuclear reactor capture neutrons without fissioning are: w) fission products x) activation products y) actinides z) lead isotopes

Description : Most of the new atoms formed when atoms in a nuclear reactor capture neutrons without fissioning are: w) fission products x) activation products y) actinides z) lead isotopes

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Description : What is the theoretical limit of the efficiency of a single-crystal single-junction cell in a photovoltaic system? w) 9 percent x) 29 percent y) 79 percent z) 99 percent

Last Answer : ANSWER: X -- 29 PERCENT

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Description : How many atoms per unit cell are in a face-centered-cubic crystal? w) two x) four y) six z) eight

Last Answer : ANSWER: X -- FOUR

Which one of the following is an example of chemical weathering? w) the splitting of a boulder x) the grinding of pebbles into sand y) the cleavage of a feldspar crystal z) the rusting of hornblende

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Last Answer : ANSWER: Z -- THE RUSTING OF HORNBLENDE

How many water molecules are contained in Cobalt (II) sulfate heptahydrate? w) 3 x) 6 y) 8 z) 7

Description : How many water molecules are contained in Cobalt (II) sulfate heptahydrate? w) 3 x) 6 y) 8 z) 7

Last Answer : ANSWER: D -- 7

Which of the following molecules would have the smallest molar enthalpy of vaporization? w) Water x) Formaldehyde y) Methane z) Ammonia

Description : Which of the following molecules would have the smallest molar enthalpy of vaporization? w) Water x) Formaldehyde y) Methane z) Ammonia

Last Answer : ANSWER: Y -- METHANE

A family of organic compounds whose molecules will add water under an acid catalysis and change into alcohols are the: w) alkenes x) alkanes y) aromatic hydrocarbons z) cycloalkanes

Description : A family of organic compounds whose molecules will add water under an acid catalysis and change into alcohols are the: w) alkenes x) alkanes y) aromatic hydrocarbons z) cycloalkanes

Last Answer : ANSWER: W -- ALKENES

Diamond has each of the following properties except: w) extreme hardness x) ability to conduct electricity y) high melting point z) tendency to burn in air

Description : Diamond has each of the following properties except: w) extreme hardness x) ability to conduct electricity y) high melting point z) tendency to burn in air

Last Answer : ANSWER: X -- ABILITY TO CONDUCT ELECTRICITY 

Which of the following is NOT a general property of hydroxide bases in aqueous solution? w) High solubility x) Bitter taste y) Ability to neutralize aqueous acid solutions z) Ability to change phenolphthalein from colorless to red

Description : Which of the following is NOT a general property of hydroxide bases in aqueous solution? w) High solubility x) Bitter taste y) Ability to neutralize aqueous acid solutions z) Ability to change phenolphthalein from colorless to red

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Based on the intermolecular forces involved, which of the following molecules will have the lowest boiling point? w) ethane x) methyl alcohol y) methyl amine z) methyl fluoride

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Which one of the following is largest? w) the number of molecules in 2 grams of hydrogen gas x) the number of molecules in 60 grams of lead sulfate y) the number of molecules in 20 liters of oxygen gas at standard temperature and pressure z) the population of the United States

Description : Which one of the following is largest? w) the number of molecules in 2 grams of hydrogen gas x) the number of molecules in 60 grams of lead sulfate y) the number of molecules in 20 liters of oxygen gas at standard temperature and pressure z) the population of the United States

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Nutrasweet, the artificial sweetener, contains molecules in which of the following groups? w) carbohydrates x) lipids y) amino acids z) nucleic acids

Description : Nutrasweet, the artificial sweetener, contains molecules in which of the following groups? w) carbohydrates x) lipids y) amino acids z) nucleic acids

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Description : Which is the HEAVIEST of the following molecules: w) butane x) ethane y) methane z) propane

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Which of the following molecules has a permanent electric dipole moment? w) H2O x) Cl2 y) CH4 z) N2

Description : Which of the following molecules has a permanent electric dipole moment? w) H2O x) Cl2 y) CH4 z) N2

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Which of the following molecules is polar? w) Iodine x) Carbon Dioxide y) Carbon Monoxide z) Chlorine

Description : Which of the following molecules is polar? w) Iodine x) Carbon Dioxide y) Carbon Monoxide z) Chlorine

Last Answer : ANSWER: Y -- CARBON MONOXIDE 

Which one of the following molecules exhibits resonance? w) Carbon Tetrachloride x) Carbonate ion y) Sulfur Dichloride z) Phosphorus Tribromide

Description : Which one of the following molecules exhibits resonance? w) Carbon Tetrachloride x) Carbonate ion y) Sulfur Dichloride z) Phosphorus Tribromide

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Molecular oxygen is said to be paramagnetic. This indicates that molecular oxygen: w) is a gas at room temperature x) forms molecules containing two oxygen atoms y) has an approximate molecular weight of 32 z) has unpaired electrons

Description : Molecular oxygen is said to be paramagnetic. This indicates that molecular oxygen: w) is a gas at room temperature x) forms molecules containing two oxygen atoms y) has an approximate molecular weight of 32 z) has unpaired electrons

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Which of these molecules is bound by ionic bonds? w) H2O x) CH4 y) NaCl z) C6H12O6

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Which of the following molecules or ions is NOT formed when K metal reacts with liquid CH3OH? Is it: w) potassium ion x) hydrogen ion y) methoxy ion z) hydrogen molecule

Description : Which of the following molecules or ions is NOT formed when K metal reacts with liquid CH3OH? Is it: w) potassium ion x) hydrogen ion y) methoxy ion z) hydrogen molecule

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Which of the following molecules has a dipole moment? w) BF3 x) NH3 y) CCL4 z) CH4

Description : Which of the following molecules has a dipole moment? w) BF3 x) NH3 y) CCL4 z) CH4

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Which of the following molecules is linear? w) SO2 x) O3 y) XeF2 z) H2S

Description : Which of the following molecules is linear? w) SO2 x) O3 y) XeF2 z) H2S

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Which of the following molecules exhibit resonance w) OF3 x) HNO3 y) C2H4 z) PCl3

Description : Which of the following molecules exhibit resonance w) OF3 x) HNO3 y) C2H4 z) PCl3

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Which of the following molecules does NOT have a dipole moment of zero? w) BeCl2 x) BF3 y) CO2 z) NH3

Description : Which of the following molecules does NOT have a dipole moment of zero? w) BeCl2 x) BF3 y) CO2 z) NH3

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What two primary factors determine whether or no molecular collision leads to a chemical reaction? w) energy and volume of molecules x) energy and mass of molecules y) energy and orientation of molecules z) orientation and volume of molecules

Description : What two primary factors determine whether or no molecular collision leads to a chemical reaction? w) energy and volume of molecules x) energy and mass of molecules y) energy and orientation of molecules z) orientation and volume of molecules

Last Answer : ANSWER: Y -- ENERGY AND ORIENTATION OF MOLECULES

Surface tension of liquids is the result of which the following: w) interaction of a liquid with its container x) unbalanced forces on the liquid's surface molecules y) adhesive forces of the liquid z) interaction of the liquid's surface molecules and the applied pressure

Description : Surface tension of liquids is the result of which the following: w) interaction of a liquid with its container x) unbalanced forces on the liquid's surface molecules y) adhesive forces of the liquid z) interaction of the liquid's surface molecules and the applied pressure

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The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell

Description : The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell

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Lipids are insoluble in water because lipid molecules are (a) hydrophilic (b) hydrophobic (c) neutral (d) zwitter ions.

Description : Lipids are insoluble in water because lipid molecules are (a) hydrophilic (b) hydrophobic (c) neutral (d) zwitter ions.

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At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic

Description : At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic

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Which of the following statement(s) is/are true concerning the cell plasma membrane? a. The plasma membrane is composed of amphipathic molecules b. The hydrophobic core of the lipid bilayer of the cell membrane contains specialized transport proteins which maintain the intracellular ionic milieu different from the extracellular fluid c. Plasma membrane proteins extend externally and bear phospholipid moieties which contribute to the cell coat d. The membrane proteins of nerve cells are highly voltage-dependent

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The hydrophobic ends of phospholipid molecules are:

Description : 12. The hydrophobic ends of phospholipid molecules are: (a) Polar (b) Non-polar © Neutral (d) Bipolar

Last Answer : Answer: b Non-polar

At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic

Description : At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic

Last Answer : (A) Dipolar ions

In terms of quality, what is the highest ranked coal? w) peat x) bituminous y) anthracite z) lignite

Description : In terms of quality, what is the highest ranked coal? w) peat x) bituminous y) anthracite z) lignite

Last Answer : ANSWER: Y -- ANTHRACITE

Which of the following terms has as its definition: a mixture having continuous and dispersed phases? w) colloid x) solute y) suspension z) solvent

Description : Which of the following terms has as its definition: a mixture having continuous and dispersed phases? w) colloid x) solute y) suspension z) solvent

Last Answer : ANSWER: W -- COLLOID

Which of the following terms best fits the statement: "Process by which polysaccharides are degraded to monosaccharides." w) hydrolysis x) glycolosis y) lipogenesis z) none of the above

Description : Which of the following terms best fits the statement: "Process by which polysaccharides are degraded to monosaccharides." w) hydrolysis x) glycolosis y) lipogenesis z) none of the above

Last Answer : ANSWER: W -- HYDROLYSIS 

For which molecule can the bonding be described in terms of sp3 hybrid orbitals of the central atom? w) CH4 x) SF6 y) BF3 z) PCL5

Description : For which molecule can the bonding be described in terms of sp3 hybrid orbitals of the central atom? w) CH4 x) SF6 y) BF3 z) PCL5

Last Answer : ANSWER: B -- CH4

Which of the following terms refers to the energy released when an electron is added to a neutral atom? w) electrovalence x) electron affinity y) electroconductance z) none of these

Description : Which of the following terms refers to the energy released when an electron is added to a neutral atom? w) electrovalence x) electron affinity y) electroconductance z) none of these

Last Answer : ANSWER: X -- ELECTRON AFFINITY

The Rate Law expresses the rate of a reaction in terms of the concentrations of the: w) reactants x) products y) by-products z) catalysts

Description : The Rate Law expresses the rate of a reaction in terms of the concentrations of the: w) reactants x) products y) by-products z) catalysts

Last Answer : ANSWER: W -- REACTANTS 

Which of the following terms refers to a material which slows neutrons? w) retarder x) moderator y) buffer z) bottleneck

Description : Which of the following terms refers to a material which slows neutrons? w) retarder x) moderator y) buffer z) bottleneck

Last Answer : ANSWER: X -- MODERATOR