CHEMISTRY Entrance Exam MUS Welcome to your CHEMISTRY Entrance Exam MUS Name Email The CFCs (fluorochlorocarbohydrates) are the main reason for: acid rains destruction of the ozone layer pollution of the water pollution of the soil None What happens when a fluorine atom becomes a fluoride ion in a chemical reaction? an electron is lost from one of the outer orbitals a proton is gained by the nucleus an electron is added to one of the outer orbitals a proton is lost by the nucleus None Between the atoms of the elements K and Br is formed a compound with: covalent nonpolar bond ionic bond covalent polar bond metal bond None The product of dehydration of a primary alcohol is an: aldehyde alkane alkene ketone None Sodium hydroxide is a strong base, because: completely dissociates in aqueous solutions changes the color of the red litmus into blue when dissolved in water releases large amounts of heat readily soluble in water None Which statement does not explain why elements in a group are placed together? They tend to have a similar oxidation number They tend to have the same chemical reactivity They tend to have the same electronegativities They tend to have the same number of valence electrons None A catalyst: always decreases the rate for a reaction actually participates in the reaction changes the equilibrium concentration of the products always increases the activation energy for a reaction None In laboratory conditions carbon dioxide may be obtained by a interaction of: calcium oxide and water calcium carbonate and water calcium hydroxide and acid calcium carbonate and acid None Which of the listed compounds contains a keto group? glucose methanol propanone glycine None Which of the following is not a physical property? Odor Boiling point Color Reactivity with oxygen None Two isomeric forms of a saturated hydrocarbon have different compositions of elements have the same structure have a different content of the isotopes of hydrogen have the same molecular formula None An aqueous solution of a salt has pH 9. Thus it follows that this is a salt of: weak acid and strong base weak acid and weak base strong acid and weak base strong acid and strong base None Methanol can be gently oxidized with hot copper metal. What is (are) the product(s) of this oxidation? acetic acid ethanol carbon dioxide and water methanal None All of the following properties of the alkaline earth metals increase going down the group EXCEPT atomic radius ionic radius first ionization energy atomic mass None The identity of an element is determined by... its atomic mass the number of its protons the number of its electrons the number of its neutrons None Which of the following is NOT true for the Group 1A elements? They are named the alkaline earth metals Their atomic radii increases with increasing molecular weight They exhibit a +1 oxidation state in compounds Most of them are soft, silvery corrosive metals None Which element has the LARGEST atomic radius? I Na Rb Li None Which substance can be decomposed chemically? Iron Hydrogen Carbon dioxide Ammonia None Which statement is INCORRECT? The amount of moisture in our atmosphere varies with location All of the gases in the atmosphere mix completely unless they react with each other The major gaseous components of our atmosphere are nitrogen, oxygen, and argon Carbon dioxide, another major component of our atmosphere, has concentrations that are relatively the same everywhere within our atmosphere None Which of the listed compounds contains an aldehyde group? propanone glucose glycine methanol None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window
