Q26 of 50 Page 1

Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

(a) PhMgBr and then H3O+.


(b) Tollens’ reagent.

(a) The reaction is as follows:


(b) The reaction are as follows:



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25

Describe the preparation of potassium permanganate from pyrolusite ore. Write balanced chemical equation for one reaction to show the oxidizing nature of potassium permanganate.

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Draw the structures of chromate and dichromate ions.

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A ketone A which undergoes haloform reaction gives compound B on reduction. B on heating with sulphuric acid gives compound C, which forms mono-ozonide D. The compound D on hydrolysis in presence of zinc dust gives only acetaldehyde. Write the structures and IUPAC names of A, B and C. Write down the reactions involved.

 26

Complete each synthesis by giving missing starting material, reagent or products:

(a)


(b)


(c)


(d)


(e)