Q14 of 30 Page 1

Explain the following giving one example for each:

i. Reimer-Tiemann reaction.


ii. Friedel Craft’s acetylation of anisole.


i)Reimer-Tiemann reaction: When phenol is treated with chloroform in presence of aqueous NaOH at 340 K followed by hydrolysis gives salicylaldehyde.



ii) Friedel Craft’s acetylation of anisole: When anisole is treated with acetyl chloride in presence of anhydrous AlCl3, 2-methoxy acetophenone is formed.



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12

State reason for each of the following:

i. The N-O bond in NO–2is shorter than the N-O bond in NO–3


ii. SF6 is kinetically an inert substance.


OR


State reasons for each of the following:


i. All the P-Cl bonds in PCl5 molecules are not equivalent.


ii. Sulphur has greater tendency for catenation than oxygen.


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Assign reasons for the following:

(i) Copper (I) ion is not known in aqueous solution.


(ii) Actinoids exhibit greater range of oxidation states than lanthanoids.


 15

How would you obtain:

(i) Picric acid (2, 4, 6-trinitrophenol) from phenol?


(ii) 2-Methyl propene from 2-methyl propanol?


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What is essentially the difference between α-form of glucose and β-form of glucose? Explain.