Advertisements
Advertisements
Which of the following reactions will yield phenol?
| (i) |  |
| (ii) |  |
| (iii) |  |
| (iv) |  |
Concept: undefined >> undefined
Name the starting material used in the industrial preparation of phenol.
Concept: undefined >> undefined
Advertisements
Which of the following is the correct representation for intermediate of nucleophilic addition reaction to the given carbonyl compound (A):
(i) 
(ii) 
(iii) 
(iv) 
Concept: undefined >> undefined
Write a test to differentiate between pentan-2-one and pentan-3-one.
Concept: undefined >> undefined
Benzaldehyde can be obtained from benzal chloride. Write reactions for obtaining benzalchloride and then benzaldehyde from it.
Concept: undefined >> undefined
Alkenes 
and carbonyl compounds 
, both contain a π bond but alkenes show electrophilic addition reactions whereas carbonyl compounds show nucleophilic addition reactions. Explain.
Concept: undefined >> undefined
Carboxylic acids contain carbonyl group but do not show the nucleophilic addition reaction like aldehydes or ketones. Why?
Concept: undefined >> undefined
Identify the compounds A, B and C in the following reaction.
\[\ce{CH3 - Br ->[Mg/ether] (A) ->[(i) CO][(ii) Water] (B) ->[CH3OH/H+][Δ] (C)}\]
Concept: undefined >> undefined
Which of the following should be most volatile?
Concept: undefined >> undefined
A compound Z with molecular formula \[\ce{C3H9N}\] reacts with \[\ce{C6H5SO2Cl}\] to give a solid, insoluble in alkali. Identify Z.
Concept: undefined >> undefined
Assertion: N-Ethylbenzene sulphonamide is soluble in alkali.
Reason: Hydrogen attached to nitrogen in sulphonamide is strongly acidic.
Concept: undefined >> undefined
Which of the following pairs represents anomers?
Concept: undefined >> undefined
Three structures are given below in which two glucose units are linked. Which of these linkages between glucose units are between C1 and C4 and which linkages are between C1 and C6?
| (I) |  |
| (II) |  |
| (III) |  |
Concept: undefined >> undefined
Why does compound (A) given below not form an oxime?
(A)
Concept: undefined >> undefined
How will you distinguish 1° and 2° hydroxyl groups present in glucose? Explain with reactions.
Concept: undefined >> undefined
Assertion: D (+) – Glucose is dextrorotatory in nature.
Reason: ‘D’ represents its dextrorotatory nature.
Concept: undefined >> undefined
Write the reactions of D-glucose which can’t be explained by its open-chain structure. How can cyclic structure of glucose explain these reactions?
Concept: undefined >> undefined
On the basis of which evidences D-glucose was assigned the following structure?
\[\begin{array}{cc}
\ce{CHO}\\
|\phantom{....}\\
\phantom{..}\ce{(CHOH)4}\\
|\phantom{....}\\
\phantom{..}\ce{CH2OH}
\end{array}\]
Concept: undefined >> undefined
Can nucleic acids, proteins and starch be considered as step growth polymers?
Concept: undefined >> undefined
Which statement about aspirin is not true.
Concept: undefined >> undefined
