Short Answer TypeAlthough phenoxide ion has more number of resonating structures than Carboxylate ion, Carboxylic acid is a stronger acid than phenol. Give two reasons.
Long Answer TypeRate constant ‘k’ of a reaction varies with temperature ‘T’ according to the equation:
where Ea is the activation energy.
When a graph is plotted for 
a straight line with a slope of -4250 K is obtained. Calculate ‘Ea’ for the reaction.
(R = 8.314 JK-1 mol-1)
How will you bring about the following conversions?
(i) Propanone to propane
(ii) Benzoyl chloride to benzaldehyde
(iii) Ethanal to but-2-enal
Give simple chemical tests to distinguish between the following pairs of compounds:
(i) Ethanal and Propanal
(ii) Benzoic acid and Phenol
(i) Distinguish test between ethanal and propanal:
Iodoform Test: Ethanal gives iodoform test.
CH3CHO + 4NaOH + 3I2 ---> CHI3 (Yellow ppt.) + HCOONa + 3NaI + 3H2O
Propanal does not give this test.
CH3CH2CHO + 4NaOH + 3I2 ---> No Reaction.
(ii) Distinguish test between Benzoic acid and Phenol:
NaHCO3Test: When Benzoic acid reacts with NaHCO3, the brisk effervescence of CO2 gas evolved.
Phenol does not give this test.
C6H5OH + NaHCO3 --> No Reaction
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