Aspirin undergoes hydrolysis to salicylic acid and it can cause ulceration in the stomach when used frequently and particularly when stomach is empty. Paracetomol is free from such effects.
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75.
Name one estrogen which forms a part of an oral contraceptive.
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76.
Give the structure of an alkyl benzene sulphonate detergent.
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77.
What is the difference between a preservative and an antioxidant?
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78.
What is an alkaloid? Give one example of drug which belongs to alkaloid group.