ANSWER ALL ORGANIC CHEM 1 a. in will fail to give a positive test with which of

Question

ANSWER ALL ORGANIC CHEM 1 a. in will fail to give a positive test with which of these compounds? 1-Butanol b. 2-Butanol c. t-Butanol (2-Methyl-2-propanol) d. Butanoic e. More than one of these 24 Which of these transformations cannot be classified as a reduction? a. RCH2C b. RCH CH2 FR CH2CH3 c. RCOOH RCH20H RCH20H ROH e. All of these are reductions 25. The bond dissociation energies for the relevant bonds are given below each of the species involved in the following reaction. Calculate the overall AH for the reaction. (CH 30C-H CHC (CH3) C-CI H C DH" a 400k Jumol a. +781kJ/mol b. +243kJ/mol C, +138kJ/mol d. -138k J/mol e. 781 kJ/mol 26. Which of the following would serve as the best synthesis of ne? Her PeroKdes Her heat HBr heat Br 2 heat 27. The IUPAC name for this compound is: a. nediol b. cis-1.2-Cyclopentanediol c. (1S, 2S) 1.2-Cyclopentanediol d. meso nediol

Explanation / Answer

23. e. More than one of these.

It will fail to give positive test with c. t-butanol and d. Butanoic acid.

24. e. All of these are reductions.

Reduction means addition of hydrogen, removal of oxygen and gain of electrons. Here all the reactions undergo reduction.

25. d. - 138 kJ/mole

H0 = DH0(Bonds broken) - DH0(Bonds formed) = (400 + 243) - ( 349 + 432 ) = -138 kJ / mole

26. b

27. e. (1R,2R) - 1,2-Cyclopentanediol

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