Practice Exam Key More worked problems

Practice Exam Key More worked problems - MULTIPLE CHOICE...

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Unformatted text preview: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Sodium is much more apt to exist as a cation than is chlorine. This is because . 1) A) chlorine is bigger than sodium B) chlorine has a greater electron affinity than sodium does C) chlorine is a gas and sodium is a solid D) chlorine is more metallic than sodium E) chlorine has a greater ionization energy than sodium does 2) The photoelectric effect is . 2) E A) a relativistic effect B) the total reflection of light by metals giving them their typical luster C) the production of current by silicon solar cells when exposed to sunlight D)rthe darkening of photographic film when exposed to an electric field @e ejection of electrons by a metal when struck with light of sufficient energy 3) Which isoelectronic series is correctly arranged in order of increasing radius? 3) A) K+ < Ca2+ < Ar < c1- B) 0— < Ar < K+ < Ca2+ C) Ca2+ < Ar < K+ < (:1- D) Ca2+ < K+ < Ar < C1- E) Ca2+ < K+ < (31- < Ar 4) Which of the following correctly lists the five atoms in order of increasing size (smallest to largest)? 4) A)F<O<S<Ba<Mg B)O<F<S<Ba<Mg C)F<O<S<Mg<Ba D)O<F<S<Mg<Ba E)F<S<O<Mg<Ba 5) The molecular geometry of the SF2 molecule is . 5) A) bent " B) tetrahedral C) trigonal planar D) linear E) octahedral B-l 6) Which electron configuration denotes an atom in its ground state? 6) ' c A) Wis 25 2p M B) is 25 2 C) 15 25 2 at] D) is 25 2p E] CID ® is 25 2p til I 7) For resonance forms of a molecule or ion, . 7) A) one always corresponds to the observed structure B) the same atoms need not be bonded to each other in all resonance forms C) all the resonance structures are observed in various proportions D) there cannot be more than two resonance structures for a given species B) the observed structure is an average of the resonance forms 8) The energy of a photon that has a wavelength of 13.2 nm is I x 8) A)1.62x10’17 KM: [3.25M 7%: 5/.31XID B) 1.99 x 10-25 "@51 x 10—17 3 7 D)9.55x10'25 abhor, h C @626 KIO ‘63 913,00 %'_/ —’7 E) 4.42 x 10-23 :: .. X [I 3 1 X ’0 ‘8 ' M 9) What is the maximum number of double bonds that a hydrogen atom can form? 9) A) O B) 1 C) 2 D) 3 E) 4 10) There are orbitals in the third shell. 10) l 2 A) 4 B) 25 C) 1 D) 9 E) 16 Z/ec‘fnou She/ :: ofiélk/gz 10/71 SW m (fa/Ml I)“; SAoil‘cuf-o; M1 = '31:? $0, 1,1 11) How many equivalent resonance forms can be drawn for 802 without expanding octet on the sulfur atom (sulfur is the central atom)? A) 4 B) 1 C) 2 D) 3 E) 0 12) The quantum n A u n - o - ‘ es the shape of an orbital. A) spin B) azimuthal C) principal D) psi E) magnetic 13) the Bohr model of the atom, . @lectron paths are controlled by probability B) electrons travel in orbitals at arbitrary distances from the nucleus @electron energies are quantized D) electrons can have any en rgy E)bofliAandCi(,/////fi 14) Which one of the following represents an acceptable possible set of quantum numbers (in the order n, 1, m1, ms) for an electron in an atom? mza,un is the most metallic. C) Na 15) Of the elements below, mm mm mMg BK 16) In general, as you go across a period in the periodic table from left to right: (1) the atomic radius ' (2) the electron affinity becomes (3) the first ionization energy negative; and A) decreases, increasingly, increases B) decreases, decreasingly, increases C) increases, increasingly, decreases D) decreases, increasingly, decreases E) increases, increasingly, increases u) 14) C m w) 17) The O—S-O bond angle in 802 is slightly less than A) 90° B) 120° C) 1095" D) 180° E) 60° 18) What color of Visible light has the lowest energy? /"' A) violet B) yellow C) blue @ E) green 19) Which one of the follow‘ - ; . cies has the electron configuration [Ar]3d4? A) K+ C) M112+ D) v3+ E) p33+ 20) The Lewis structure of HCN (H bonded to C) shows that has nonbonding electron pairs. A) H,1 B) N,1 C) C,1 D) C,2 E) N,2 21) The central atom in violates the octet rule. A) BF3 B) NH3 C) CF4 D) Ser E) AsF3 7 ( l 22) The halogens, alkali metals, and alkaline earth metals have respectively. B)1,5,and7 D)8,2,and3 A) 2, 7, and 4 23) The electron—domain geometry and the molecular geometry of a molecule of the general formula ABn will always be the same if valence electrons, E) 7, 4, and 6 N A) there are no lone pairs on the central atom B) n is greater than four C) the octet rule is obeyed D) there is more than one central atom E) n is less than four is polar. C) H2 24) Of the following molecules, only A) C12 B) CC14 D) BC13 E) NC13 17) 21) 22) C 23) 24) 9 5W0 25) All of the orbitals in a given subshell have the same vlue of the M “it 1/ a) 9 I u 5W=W MSW bagel (I‘M E) B and C D) A anch— B) magnetic I 9‘26) Oxides of most nonmetals combine with water to form A) water and a salt B) hydrogen gas C) an acid D) water E) a base 27) Of the atoms below, A) C1 is the least electronegative. B) Rb C) F D) Ca E) Si 28) In the resonance form of ozone shown below, the formal charge on the central oxygen atom is A) +2 B) -2 C) +1 D) —1 E) 0 29) The ground state electron configuration of Ga is C) 1322523823p63d 104524131 30) In which of the molecules below is the carbon—carbon distance the shortest? C) H3C—CH2—CH3 A) [Ar14523d11 [9, z (D I _ R 45 34 ‘ip D) 1522522p63523p63d104524d1 ' A) H3C—CH3 D) H2C=C=CH2 B) 1522522p63523p64524d104131 @22532p63323g331523d104p1 [A R3: (51 zsialoé 3S1; P‘ B) H—CsC—H ' E) H2C=CH2 B-5 quantum number(s). 25) :D 26) 27) 28) 30) ...
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Practice Exam Key More worked problems - MULTIPLE CHOICE...

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