CHEM 101 Midterm: CHEM 101 TAMU Exam fcd-Spring 2010

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31 Jan 2019

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9/10) c 11/12) c 13/14) b 15/16) d 17/18) a 19/20) e 21/22) b 23/24) a. 25/26) d 27/28) c 29/30) c 31/32) d 33/34) e 35/36) d 37/38) e 39/40) b 41/42) e 43/44) c 45/46) b 47/48) a. 49/50) a 51/52) d 53/54) a 55/56) c 57/58) c 59/60) b. 11/12) c 13/14) e 15/16) e 17/18) a 19/20) c 21/22) e 23/24) a. 25/26) b 27/28) a 29/30) d 31/32) c 33/34) b 35/36) d 37/38) c 39/40) a 41/42) d 43/44) e 45/46) b 47/48) a. 49/50) b 51/52) b 53/54) c 55/56) c 57/58) d 59/60) a.

Related Questions

mass spec

identify the molecular ion peak in the base Peak and draw the corresponding structures

identify at least one other fragment ion and draw is structure

Please answer all the questions!

Nitrobenzene + Br_2/Fe + heat yields which product(s): a. m-bromonitrobenzene b. o-bromonitrobenzene c. p-bromonitrobenzene d. both b & c acetophenone + Br_2/Fe + heat yields which product(s): a. m-bromoacetophenone b. o- bromoacetophenone c. p- bromoacetophcnone d. both b & c cumene + HNO-3/H_2SO_4 + heat rightarrow a. m-nitrocumene b. o-(2-CH(CH_3)_2)benzenesulfonic acid c. o & p-nitrocumene d. something else! Which is the most acidic? a. cumene b. 4-nitroaniline c. 4-nitrophenol d. 4-methoxyphenol e. 4-methylphenol Which is the most basic? a. cumene b. 4-nitroaniline c. 4-methoxyaniline d. 4-chlorophenol c. 4-methylphenol nitrobenzene + acetyl chloride - AICl_3 rightarrow a. o-CH_3(C = O)NO_2benzene b. p-CH_3(C = O)NO_2 benzene c. p-CH_3 -(C = O)NO_2 benzene d. a & b e. no rxn benzene + 1. Br_2/FeBr_2 followed by 2. H_2SO_4/SO_3 rightarrow a. o-bromobenzenesulfonic acid b. p-bromobenzenesulfonic acid c. both a & b d m isomer e. no rxn benzene + 1.. H_2SO_4/SO_3 followed by 2. Br_2/FeBr_3 a. o-bromobenzenesulfonic acid b. p-bromobenzenesulfonic acid c. both a & b d m isomer e. no rxn benzene + acetyl chloride + AlCl_3 followed by Cl_2/AlCI_3/heat rightarrow a. o-chloroacetophenone b. p-chloroacetophenone c. m-chloroacetophenone d. a & b e. no reaction! p-methylanisole + HNO-3/H_2SO_4/heal rightarrow a. 2-nitro-4-methylanisole b. 3-nitro-4-methylanisole c. 3-nitro-5-methylanisole d. no rxn e. something else toluene + KMnO_4/OH^-/heat, then dilute acid quench, followed by HNO_3/H_2SO_4 rightarrow a. 3-nitrotoluene b. 4-nitrobenzenoic acid c. 3-nitrobenzoic acid d 2-nitrotoluene e. something else! a. 3-ehloroacetophenone b. 3-chlorophenol c. 4-chlorophenol d. 4-Chlorophenyl-l-ethanol e. a-d incorrect toluence + NBS/light, followed by NBS /light (repeat reaction a total of 3 times), then HNO_3/H_2SO_4 rightarrow a. 3-NO_2(Ph)CBr_3 b. 4-NO_2(Ph)CBr_3 c. 4-nitrotoluene d. 4-nitro-1, 3, 5-tribromobenzene e. a-d incorrect aniline + NaNO_2/HCI/zero degrees, then CuCN rightarrow a. benzonitrile b 2-cyanoaniline c. 4-cyancaniline d. both b & c e. 3-chloroaniline aniline + NaNO_2/HCI/zero degrees, then Cul a. 4-iodoaniline b. 4-nitroiodobenzene c. iodobenzene d. both a & b. e. something else! Do the following text problems: 1, 2., 3, 4, 5, 6, 7, 10, 11, 13, 14, 15, 17, 18, 23, 26, 28, 29, 30, 31, 36, 38, 39, 40, 42, 43, 45, 46, 48, 49, 50, 51, 55, 56, 61, 62

41. If 25 mL of 0.055 MHCl are added to 35 mL of distilled H₂O, what is thefinal pH

(A) 0.20
(B) 1.26
(C) 1.41
(D) 1.64

42. A solution prepared by dissolving 0.100 mole of propionicacid in enough water to make 1.00 L of solution is observed to havea pH = 2.94. What is the K_a for propionic acid?

(A) 1.3 x 10Â¯⁶
(B) 1.1 x 10Â¯³
(C) 1.3 x 10Â¯⁵
(D) 1.1 x 10Â¯²

43. When 0.1M aqueous solutions of the following salts arearranged in order of increasing basicity, what is the correctorder?

SALTS
I. NaCl
II. NH₄Cl
III. NaHCO₃

(A) I < II < III
(B) I < III < II
(C) II < I < III
(D) III < I < II

47. How many electrons are required to balance the half reactionin which dichromate ion, Cr₂O₇²Â¯is converted to chromium(III) ions in acid solution?

(A) one
(B) five
(C) six
(D) eight

48. Solutions of Ag⁺, Cu²⁺,Fe³⁺ and Ti⁴⁺ are electrolyzed with aconstant current until 0.10 mol of metal is deposited. Which willrequire the greatest length of time?

(A) Ag⁺
(B) Cu²⁺
(C) Fe³⁺
(D) Ti⁴⁺

49. What type of radiation is emitted during a nuclear processin which a nucleas with a greater atomic number is formed?

(A) alpha particles
(B) beta particles
(C) positrons
(D) gamma rays

50. Which pair of elements is listed in order of decreasingfirst ionization energy?

(A) Na, Mg
(B) Mg, Al
(C) Al, Si
(D) Si, P

53. An element with a low melting point that does not conductelectricity would most likely be found on the periodic table

(A) in the upper right portion
(B) in the upper left portion
(C) in the lower left portion
(D) in the middle

54. The first three ionization energies of an element X are 590,1145, and 4912 kJ/mol. The most likely formula for a stable ion ofX is

(A) X⁺
(B) X²⁺
(C) X³⁺
(D) XÂ¯

55. The highest oxidation state known for vanadium (Z = 23)is

(A) 2
(B) 3
(C) 4
(D) 5

56. Which have both ionic and covalent bonds?

SALTS
-------------
I. NH₄Br
II. NaNO₂

(A) I only
(B) II only
(C) both I and II
(D) neither I or II

57. How many valence electrons are present in the tetraborateion (B₄O₇²Â¯)?

(A) 42
(B) 54
(C) 56
(D) 62

58. Which substance has the highest melting point?

(A) silicon carbide, SiC
(B) phosphorus pentachloride, PCl₅
(C) sulfer, S₈
(D) phosgene, COCl₂

59. All of the following species are pyramidal in shapeexcept

(A) SO₃²Â¯
(B) NH₃
(C) BF₃
(D) H₃O⁺

60. In which compounds in the liquid state does hydrogen bondingoccur?

Compounds
-----------------
I. ammonia
II. hydrogen peroxide
III. methane

(A) I only
(B) I and II only
(C) I and III only
(D) I, II, and III

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CHEM 101 Midterm: CHEM 101 TAMU Exam fcd-Spring 2010

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