1. The Joule-Thomson coefficient of a gas, (∂T/∂P)H ,is measured under conditions of constant A. energy B. enthalpy C. entropy D. pressure E. temperature 2. The vapor pressure of pure acetone is 347 mmHg, A mixture of 58.0g of acetone and 2.0g of water is made. According to Raoult’s Law, what is the partial vapor pressure is the acetone in this mixture? A. 382 mmHg B. 335 mmHg C. 312 mmHg D. 298 mmHgE. 242 mmHg 3. According to Le Chatelier’s Principle the addition of heat to the following reaction CO2(g)+2H2O(g) →CH4(g)+2O2(g) will cause it to shift the right. This reaction can therefore be described as
A. spontaneous B. endothermic C. unimolecular D. exothermic E. adiabatic 4. If the value of △G° for a given reaction is known, we may determine all of the following EXCEPT the
A. direction of spontaneous change at standard conditions B. position of equilibrium at the temperature for which △G° is known. C. maximum amount of useful work that can be produced at standard conditions. D. stability of the products as compared to the reactants at standard conditions E. usefulness of a catalyst in controlling the reaction 5. Consider the two half reactions Ag→ Ag++e- E0=0.8v Zn2++2e- → Zn E0 =-0.76v Which of the following statements is/are true? A. The standard potential for the reaction is +1.56v B. As written, the reaction is spontaneous. C. The sign of the reaction potential indicates whether the reaction is spontaneous or not D. All of above E. None of above
6. Periodic acid oxidation of D-glucose in aqueous solution gives A. 4HCOOH+2CH2O B.2HCOOH+4CH2O C.5HCOOH+CO2 D.5HCOOH+CH2O 7. Alkyens can be partically hydrogenated to alkenes by used of metal catalysis and H2 gas. The resulting alkenes have which sterostructure? A. trans B. cis C. misture of cis and trans D. stereostructure varies with temperature of reaction E. stereostructure varies with pressure of reaction 8. To distiguish among primary, secondary and tertiary alcohols, one would use the following experimental method. A. Sandmeyer reaction B. Witting reaction C. Lucas Test D. Ninhydrin test E. Tollen’s reagent 9. Which of the following is designated dimethylamin-propane under IUPAC rules of nomenclature?
A. CH3CH2CH2N(CH3)2 B. (CH3)2CHCH2NH2 C. (CH3)3CNH2 D. (CH3)2CHCN E. None of the above 10.A secondary alcohol is formed through oxymercuration demercuration of which of the following? A. 2-methyl-1-bromproene B. 2,2-diethyl-penteneC. hexane D. 1-hexene E.1-hexanal 11.What is the oxidization number of chlorine in ClO4- A. +1 B. +3 C. +5 D. +7 E. +8 12 which of the following substances has the least ionic character in its bond?
A. CCl4 B. KCl C. MgCl2 D. NaCl E. BaCl2 13. Which of the following species contain no covalent bonds
A. KCl, B2H6,PH6 B. KCl, H2SO4 C. O2, PH3, B2H6 D, KCl E. KCl, B2H6 14. Brass is an alloy of
A. copper and tin B. copper and zinc C. aluminum and nickel D. titanium and potassium E. manganese and magnesium
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