1) Which of the following is a true statement a. all chiral molecules possess a

Question

1) Which of the following is a true statement a. all chiral molecules possess a plane of symmetry b. all achiral molecules are meso c. all molecules which possess a single chirality center of the s configuration are levorotatory d. a mixture of achiral compounds will be optically inactive e. all molecules which possess 2 or more chirality centers will be chiral 2)Which of the following statements is true about a molecular ion? a. it is a compound that lost a pair of electrons b. it is a compound that gained a pair of electrons c. it is a compound that gained on electron d. it is a compound that lost one electron e. it is a compound that carries a free radical and a negative charge. 1)Which of the following species has a characteristic broad absorption at 3200-3500 cm-1 in its IR Spectrum? a.PhCH2CN b. PhCH2N(CH3)2 c.PhCH2CO2CH3 d. PhCH2CH2OH e.PhCH2OCH3 2)Which compound's mass spectrum shows peaks at M, M+2, and M+4 whose abundance are in a ration of 1:2:1? a.cyclohexanol b. chlorocyclohexane c. 1,2-dichlorocyclohexane d. 1-bromopentane e. 1,5-digromopentane 1)Identify the compound with the highest wavelength in an UV spectrum. a. benzene b. phenol c. phenolate ion d. aniline e. anilinium ion 2) An Increase in conjugation is correlated with_____ in the energy of the LUMO, _____ in the energy of the HOMO, and ____ in lmax. a. a decrease, an increase, a decrease b. a decrease, an increase, an increase c.an increase, a decrease, a decrease d. an increase, a decrease, an increase e. an increase, an increase, a decrease

Explanation / Answer

d e c b a c d

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