Which of the following compounds has the highest solubility in hexane? (A) Pheno

Question

Which of the following compounds has the highest solubility in hexane? (A) Phenol (B) ethan-1, 2-diol (C) diethyl ether (D) methanamine (E) diethylamine Which of following compounds can react of with Grignard Reagent? (A) cyclohexene (B) 2-pentene (C) diethyl ether (D) triethylamine (E) benzaldehyde Which of the following reagents that can react with ethylethanoate to form ethanol? (A) H_2/Ni (B) 1) NaBH_4 2) H_3O^+ (C) PCC (D) 1) LiAIH_4 2) H_3O^+ (E) K_2Cr_2O_7 Which of the following compounds cannot react with sodiumboronhydride? (A) benzaldehyde (B) cyclohexanone (C) 2, 2-dimethyl-3-pentanone (D) 2, 4-dinitroabenzamide (E) butane-1, 4-dialdehyde Which of the following compounds has the highest reactivity in the acid derivatives? (A) benzoic acid (B) methyl benzoate (C) benzamide (D) benzoyl bromide (E) benzoic anhydride

Explanation / Answer

17. The answer is C diethylether, As like dissolves like. Hexane is non-polar solventwill be miscible with non-polar solvent which is diethylether

18. The answer is E Benzaldehyde, addition around polar C=O bond occurs

19. The answer is D, As ethylethanoate is ans ester which on reaction with LiAlH4 results in formation of ethanol a nd the acid pard is reduced to aldehyde or alcohol depending on number of equivalents of LiAlH4 is used

20. The answer is D , 2,4-Dinitrobenzanamide, as aldehydes or ketones reduce to form alcohol in presence of NaBH4

21. The answer is D, Benzoyl bromide, as bromide ion serves as a good leaving group, thus facilitate the reaction.

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