Description : Which of the following substances is a molecular solid? w) Glass x) Ice y) Silver z) Table Salt
Last Answer : ANSWER: X -- ICE
Description : Which of the following substances is an ionic netw solid? w) Diamond x) Table Salt y) Brass z) Dry ice
Last Answer : ANSWER: X -- TABLE SALT
Description : Amphoteric substances: w) act as either bases or acids x) precipatate from aqueous solutions y) salt out of basic solutions z) form emulsions in oils
Last Answer : ANSWER: W -- ACT AS EITHER BASES OR ACIDS
Description : Which of the following substances is classified as amorphous? w) glass x) Zinc y) diamond z) sodium chloride
Last Answer : ANSWER: W -- GLASS
Description : Dry ice is the solid form of what gas? w) nitrogen x) oxygen y) helium z) carbon dioxide
Last Answer : ANSWER: Z -- CARBON DIOXIDE
Description : Cloud droplets unite most easily to form raindrops in clouds containing which of the following substances? w) ozone x) plant pollen y) carbon tetrachloride z) large salt crystals
Last Answer : ANSWER: Z -- LARGE SALT CRYSTALS
Description : Ionic substances dissolve in water to form: w) highly acid solutions x) electrolytic solutions y) colloids z) emulsions
Last Answer : ANSWER: X -- ELECTROLYTIC SOLUTIONS
Description : Which of the following substances would be the best choice to neutralize sulfuric acid? w) sodium hydroxide x) silicon dioxide y) copper metal z) phosphorus pentoxide
Last Answer : ANSWER: W -- SODIUM HYDROXIDE
Description : Which of the following substances would be expecte to have the highest melting point? w) Potassium Bromide x) Iodine y) Methane z) Hydrogen Chloride
Last Answer : ANSWER: W -- POTASSIUM BROMIDE
Description : In which of the following class of substances would WAX be found? w) carbohydrates x) lipids y) proteins z) nucleic acids
Last Answer : ANSWER: LIPIDS
Description : Which of the following substances would be the best choice to neutralize aqueous Sodium Hydroxide? w) sodium carbonate x) silicon dioxide y) aluminum oxide z) phosphorus pentoxide
Last Answer : ANSWER: Z -- PHOSPHORUS PENTOXIDE
Description : A process in which substances are separated throug differences in the rates at which the components migrate is called: w) filtration x) chromatography y) elution z) titration
Last Answer : ANSWER: X -- CHROMATOGRAPHY
Description : What is the molecular geometry of thiocyanate (pron: thie-owe-SIE-a-nate) ion (SCN minus 1)? w) linear x) angular y) tetrahedral z) pyramidal
Last Answer : ANSWER: W -- LINEAR
Description : What is the molecular geometry of the Bromine Tetraflouride ion (B-F-4-minus 1) w) linear x) angular y) tetrahedral z) pyramidal
Last Answer : ANSWER: Y -- TETRAHEDRAL
Description : What is the molecular geometry of XeO2 (Xenon Dioxide)? w) linear x) angular y) tetrahedral z) trigonal planar
Last Answer : ANSWER: X -- ANGULAR
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
Last Answer : ANSWER: Z -- HAS UNPAIRED ELECTRONS
Description : The alcohol with lowest molecular weight is: w) isopropanol x) propanol y) ethanol z) methanol
Last Answer : ANSWER: Z -- METHANOL
Description : The molecular shape of formaldehyde, H2CO, is: w) linear x) trigonal planar y) bent z) tetrahedral
Last Answer : ANSWER: X -- TRIGONAL PLANAR
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
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
Description : The theory of interionic attraction attributed to Debye and Hückel: w) was disproved by Arrhenius x) accounts quantitatively for the attraction between ions in dilute aqueous solutions y) does not account for kindered "ion-activity" z) accounts for intra-molecular polar bonds
Last Answer : ANSWER: X -- ACCOUNTS QUANTITATIVELY FOR THE ATTRACTION BETWEEN IONS IN DILUTE AQUEOUS SOLUTIONS
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
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
Description : Which of the following metals is least subject to oxidation? w) silver x) gold y) magnesium z) nickel
Last Answer : ANSWER: X -- GOLD
Description : Which of the following elements does not occur in nature as a native ore? w) silver x) gold y) platinum z) aluminum
Last Answer : ANSWER: Z -- ALUMINUM
Description : A COPPER strip is placed in one compartment of a voltaic cell and a wire connects this strip to a piece of metal in the other compartment through a voltmeter. If the voltmeter reads zero, the other piece of metal is: w) zinc x) mercury y) silver z) copper
Last Answer : ANSWER: Z -- COPPER
Description : The silver luster of the metals can be attributed to one of the following. It is attributed to their free w) protons x) ions y) neutrons z) electrons
Last Answer : ANSWER: Z -- ELECTRONS
Description : Which one of the following metals is immune to corrosion by air, water, hydrochloric acid and nitric acid; but is soluble in aqua regia? w) gold x) silver y) magnesium z) nickel
Last Answer : ANSWER: W -- GOLD
Description : Which of the following compounds is ONLY WEAKLY soluble in cold water? w) Silver Nitrate x) Sodium Carbonate y) Sodium Chloride z) Lead Chloride
Last Answer : ANSWER: Z -- LEAD CHLORIDE
Description : A metal that does NOT occur native in the earth is w) copper x) gold y) sodium z) silver
Last Answer : ANSWER: Y -- SODIUM
Description : Choose the correct statement about osmotic diuretics: A. They are large molecular weight substances which form colloidal solution B. Their primary site of action is collecting ducts in the ... C. They increase water excretion without increasing salt excretion D. They can lower intraocular pressure
Last Answer : D. They can lower intraocular pressure
Description : (4) sodium chloride contains hygroscopic impurities like magnesium chloride Explanation: Table salt is refined salt, which contains about 97 to 99 percent sodium chloride. It usually contains substances that ... of salt it become wet in rainy season as the salt absorbs moisture from environment.
Last Answer : Which of the following could be used as fuel in propellant or rockets? (1) Liquid Hydrogen + Liquid Nitrogen (2) Liquid Oxygen + Liquid Argon (3) Liquid Nitrogen + Liquid Oxygen (4) Liquid Hydrogen + Liquid Oxygen
Description : What is the purpose of the salt bridge in an electrochemical cell? w) It allows ion migration. x) It allows electron flow. y) It prevents ion migration. z) It prevents electron flow.
Last Answer : ANSWER: W -- IT ALLOWS ION MIGRATION
Description : An aqueous solution is always a solution in which the: w) solute is water x) solute is a salt y) solvent is a salt z) solvent is water
Last Answer : ANSWER: Z -- SOLVENT IS WATER
Description : Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium
Last Answer : ANSWER: Z -- SODIUM
Description : Foods cooked in salt water compared to unsalted water will: w) cook faster x) boil at a lower temperature y) not be affected in any way z) will cook slower because of the action of the salt
Last Answer : ANSWER: W -- COOK FASTER
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
Description : What is the molarity of a salt solution prepared b dissolving three moles of salt in 500 milliliters of water? w) 1 x) 2 y) 4 z) 6
Last Answer : ANSWER: Z -- 6
Description : Which of the following chemical reactions does not lead to formation of a salt? w) Reaction of salts with acids. x) The reaction of base anhydrides with acid anhydrides. y) Action of water on oxides of nonmetals. z) Reaction of acid with base.
Last Answer : ANSWER: Y -- ACTION OF WATER ON OXIDES OF NONMETALS. (If water reacts with oxides of nonmetals, an acid is formed.)
Description : Which is an example of a polymer? w) salt x) oil y) plastic z) glucose
Last Answer : ANSWER: Y -- PLASTIC
Description : An alcohol is related to an ester as a hydroxide compound is related to: w) an acid x) a ketone y) an ether z) a salt
Last Answer : ANSWER: Z -- A SALT
Description : Which of the following is a metallic salt of a fatty acid? Is it: w) soap x) plastic y) rubber z) petroleum
Last Answer : ANSWER: A -- SOAP
Description : Acids react with bases to form which of the following? Do they form: w) salt and acidic anhydride x) water and basic anhydride y) basic anhydride and salt z) salt and water
Last Answer : ANSWER: D -- SALT AND WATER
Description : Crystals of ice are: w) isometric x) tetragonal y) hexagonal z) orthorombic
Last Answer : ANSWER: Y -- HEXAGONAL
Description : Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally-------? A. ionic substances B. metallic substances (Answer) C. molecular solids D. covalent network solids
Last Answer : B. metallic substances (Answer)
Description : The process of a solid converting directly into a gas is called: w) fusion x) sublimation y) condensation z) distillation
Last Answer : ANSWER: X -- SUBLIMATION
Description : The energy required to melt one mole of a solid at its melting point is called one of the following. w) the molar heat of fusion x) the molar hear of vaporization y) the molar heat of capacity z) the melting point
Last Answer : ANSWER: W -- THE MOLAR HEAT OF FUSION
Description : The critical temperature is the temperature: w) above which a substance cannot be vaporized x) at which the density is a minimum y) at which solid, liquid, and vapor are in equilibrium z) above which the substance cannot be liquified.
Last Answer : ANSWER: Z -- ABOVE WHICH THE SUBSTANCE CANNOT BE LIQUIFIED.
Description : Elements that exist in two or more distinctly different solid forms are known as: w) azeotropes x) allotropes y) isotopes z) isochores
Last Answer : ANSWER: X -- ALLOTROPES
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