12. Which reaction coordinate diagram is most likel, , 19. Which of these struct

Question

12. Which reaction coordinate diagram is most likel, , 19. Which of these structures, shown in Fischer projections represent the reaction pathway? represents a chiral molecule? differeace in the boiliag point of best be which factor? (A) The steric effect of the methyl group in (B) A resonance effect in the compound 1 (C) Hydrogen bonding between molecules of D) The electron donation of the methyl group in OH (D) 13 What would be the relative rate of hydrolysis of these 0. An optically active saturated ketone (CH140) reacts with a catalytie amouat of KOD in CH,OD to give a ketone CaH DO that is optically active. What is the structure of the original ketone 10. compounds in water-acetone at 25 "C? The melting range of 4-nitrobenzyl alcohol is reported as 92-94 "C and the melting range of triphenylmethane is reported as 92-94 "C. Which statement most accurately reflects the expected result for the melting range of a 50.50 mixture of the two? A) The mixture wil have a melting range of 92-94 "C 17. Which is the product of (B) The mixture will melt over a broad temperature (C) The mixture will have a sharp melting point above (D) The mixture will have a sharp melting point below range below 94 °C C CHyCCH CHCH,CH (A) I> II> III (D) I>III>11 (D) CHjCH 11. Which choice 4. Which carboxylic acid is the strongest acid? ranks these compounds from weakest acid? What R andlor S A) CH CHCH COH )CH3CHCHCOH would be used for this HiC 8 What is likely to be a major product of this reaction (B) 25, 3R C) 2R, 3 D) 2S, 3 15. Which of the indicated bydrogens is most acidic? THF NOH CH2-CH = CH-C C-H CHy CHy (A) 1>3>2>4 (C) 4>2> 3>1 (B) 2>4>3>1 (D) 4>3>2>1 (B) II & III

Explanation / Answer

9) Option-A. The Steric effect in methyl group in compound A Because methyl group near molecule consumes more energy.

10)Option- A.Because here melting range and composition of each is same.

11)Option-C.Because -SO2OH containing acid is the strongest and -OH containing is the weekest. Only C specifies this criteria.

12) Option-B

13)Option-C.As alkyl compounds can easily be hydrolysed and then 3°-2° and 1°

14)Option-B as it has more electonegative molecules on one side.

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