Please explain the answers as simply as possible, using them to study for my tes

Question

Please explain the answers as simply as possible, using them to study for my test.

5. Select the reagent(s) for the following reaction OH HO OH a. (1) LiAIH4, ether (2) H2O b. (1) NaBH4 (2) H3o C. H2 with Pt/C d. (a) and (b) e. None of the above would be suitable 6. Which of these compounds will yield 1-propanol when reacted with excess sodium borohydride? OCH3 OH e. More than one of these 7. Which of the following is not a synthesis of benzophenone (diphenylketone)? OH AICI PCC benzene CH2Cl2 OH AgNO3, NHa 2. Zn, HOAc NaOH, H20 e. All of these will give benzophenone 8. Which reagent will not differentiate between 3-butenal and n-butanol? a. Br2/CCl4 b. Ag20, NaOH C. H2NNHC6H5 d. Na2Cr207, H2SO4 e. all of these would be suitable

Explanation / Answer

5) Option A is correct

explanation: LiAlH4 is a strong reducing agent and reduces ester to alcohol and ketone to alcohol.

6) option D is correct

Explanation: NaBH4 is a mild reducing agent which reduces aldehyde to alcohol and it cannot reduce ester.

7) option D is not a synthesis of benzophenone.

8) option D is correct

Explanation: Na2Cr2O7 oxidises alcohol to carboxylic acid and aldehyde to carboxylic acid.

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