#1. Which following statement statements is WRONG forBenzocaine?
A. It is an aromatic carboxylic ester.
B. Benzocaine is acidic in nature.
C. It is basic in nature.
D. Benzocaine is used to reduce the pain or discomfort caused bysore throat, teething pain, rectal irritation, hemorrhoids etc.
E. It does not show any side effects if you take more than thedose.
F. It is a colorless trapezial crystal.
| a) | Benzocaine is acidic in nature. |
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| b) | It does not show any side effects if you take more than thedose. |
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| c) | Benzocaine is used to reduce the pain or discomfort caused bysore throat, teething pain, rectal irritation, hemorrhoids etc. |
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| e) | It is an aromatic carboxylic ester. |
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| f) | It is a colorless trapezial crystal. |
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#2: Why is sulfuric acid added in an Esterification reaction?(synthesis of benzocaine)
a. It neutralizes base produced in the reaction.
b. It pushes the reaction to completion by dehydrating theproduct.
c. It is used as a polar protic solvent
d. It activates the carbonyl of p-aminobenzoic acid making itmore reactive.
e. A low pH is needed for the reaction to occur
| a) | It is used as a polar protic solvent. |
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| b) | It pushes the reaction to completion by dehydrating theproduct. |
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| c) | It activates the carbonyl of p-aminobenzoic acid making it morereactive. |
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| d) | A low pH is needed for the reaction to occur. |
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| e) | It neutralizes base produced in the reaction. |
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#3. How many different types of proton (By looking H1 NMRspectrum) present in the Benzocaine?
#4. In the IR spectrum of Benzocaine, which peaks arerepresenting C-O stretching bands?
| - 1284.32 and 1052.82 cm-1
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| - 1681.39 and 1635.84 cm-1
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| - 1476.76 and 1442.50 cm-1
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| - 773.71 and 743.44 cm-1
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