ROH_ANS - Hydroxy compounds 94(I)4(a ROH/ALA/P.1 Adding...

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Hydroxy compounds ROH/ALA/P.1 94(I)4.(a) Adding NaHCO 3 (aq) to CH 3 COOH, colourless gas bubbles given out. Adding NaHCO 3 (aq) to phenol, no gas bubbles are formed. ( 1 + 1 ) 96(II)7.(b) (i) Formula mass of (CH 3 ) 3 COH = 74.12 Formula mass of HCl = 36.458 Formula mass of (CH 3 ) 3 CCl = 92.562 No. of moles of (CH 3 ) 3 COH = 12 . 74 25 = 0.337 ( 1/2 ) No. of moles of HCl = 458 . 36 36 = 0.987 ( 1/2 ) HCl is in excess (CH 3 ) 3 COH is the limiting reagent ( 1/2 ) (ii) No. of moles of (CH 3 ) 3 CCl = 562 . 92 28 = 0.302 ( 1/2 ) % yield = 100% 0.337 0.302 × = 89.6 % ( 1 ) (iii) unimolecular nucleophilic substitution ( 1/2 ) Mechanism : (CH 3 ) 3 C OH H Cl (CH 3 ) 3 C OH 2 (CH 3 ) 3 C (CH 3 ) 3 C Cl + + Cl 98(I)4.(b) CH 3 CH 2 CH 2 CH 2 OH OH OH C CH 3 OH CH 3 CH 3 C CH 3 H CH 2 OH CH 3 OH (i) ; ; ( 1/2 × 3 ) (ii) Upon reaction with Zn / conc. HCl , E gives turbidity (d ) slower than (CH 3 ) 3 COH ; but faster than CH 3 (CH 2 ) 3 OH and (CH 3 ) 2 CHCH 2 OH ( 1/2, 1/2, 1/2 ) (1/2) (1/2) (1/2) (1/2)
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ROH_ANS - Hydroxy compounds 94(I)4(a ROH/ALA/P.1 Adding...

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