Q3 of 36 Page 1

Write one stereochemical difference between SN1 and SN2?

Although both SN1 and SN2 are nucleophilic substitution reaction. But, the differences between these two are as follows

SN1: It is a two step mechanism. Also, the rate determining step is unimolecular.


whereas


SN2: It is one step mechanism. Also, the rate determining step is bimolecular.


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20

(i) Why bithional is added in soap ?

(ii) Why magnesium hydroxide is a better antacid than sodium bicarbonate ?


(iii) Why soaps are biodegradable whereas detergents are non-biodegradable ?


OR


Define the following terms with a suitable example in each :


(i) Antibiotics


(ii) Artificial sweeteners


(iii) Analgesics


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What type of Stoichiometric defect is shown by ZnS and why?

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State Henry’s Law and write its two application?

 24

Define the following with a suitable example in each

(i) Oligosaccharides


(ii) Denaturation of Protein


(iii) Vitamins