Give the hybridization of Carboxylic carbon? sp sp^2 sp^3 sp^4 Give the bond ang
ID: 1050393 • Letter: G
Question
Give the hybridization of Carboxylic carbon? sp sp^2 sp^3 sp^4 Give the bond angle at the carbonyl carbon. 90 degree 104.5 degree 109.5 degree 120 degree Identify the compound with the lowest pK_a. Acetic acid Chloroacetic acid Dichloroacetic acid Trichloroacetic acid Write down the product Ethanoic acid propanoic acid Butanoic acid Ethanal Propanal Write down the product. Ethanoic acid Propanoic acid Butanoic acid Butanoyl chloride Pentanoyl chloride Ans: Write down the product. Ethanoic acid Propanoic acid Butanoic acid Butanoyl chloride Pentanoyl chlorideExplanation / Answer
1) Answer
b) sp2
In carbonyl carbon form three sp2 orbital by mixing 1 s and 2 p orbital these three sp2 hybridised orbital form three sigma bond with carbonyl oxygen, - OH and with other carbon . one unhybridised orbital form pi bond with carbonyl oxygen.
2) Answer
d) 1200
in carboxylic acid carbonyl carbon and carbonyl oxygen both are sp2 hybridised and one pi bond between them thus, bond angle is 1200
3)Answer
d) trichloroacetic acid
pKa value for acid
Acetic acid = 4.75
choroacetic acid = 2.87
dichoroacetic acid = 1.35
trichoroacetic acid = 0.66
chlorine is strong electron withdrawing element therefore as no. of chlorine increases electron withdrawing power increases. due to electron withdrawing group when acid donate proton then resulted conjugate base formed are stabilized and acid becone strong more the strong acid have smaller pKa value.
4)Answer
a) Ethanoic acid
Na2Cr2O7/H2SO4 is oxidising agent oxidise primary alcohol to corresponding aldehyde and these aldehyde to corresponding acid . no. of carbon remain same therefore ethyl alcohol give acitic acid.
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