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Mere Teacher · Previous Year Questions
JEE Main Chemistry · Amines · Set 8 (Q211-240)
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211.
Which one of the following gives the most stable Diazoniumsalt ?
(1)CH3 − CH2 − CH2 − NH2
(2)
(3)CH3−CH(CH3)−NH2
(4)
212.
In the reaction :
P,Q and R respectively are
(1)NaNO2+ dil. HCl,HBF4,Cu+NaNO2
(2)NaNO2+ conc. HCl,F2,Cu+NaNO3
(3)NaNO2+ dil. HCl,BF3,Cu+NaNO2
(4)NaNO3+ dil. HCl,F2,Cu+NaNO3
213.
Identify the correct statement for the below given transformation.
The compound ' A ' decolourises Br2/CCl4 and releases N2 gas with HNO2. The compound ' A ' is
(1)
(2)
(3)
(4)
215.
In the given reactions, ' X ' and ' Y ' respectively are C6H5CH2NH2XC6H5CONH2YC6H5NH2
(1)LiAlH4,H2O;Br2/OH−
(2)Br2/OH−;LiAlH4,H2O
(3)Br2/H+;NaBH4
(4)NaBH4;Br2/H+
216.
The correct structures of A and B formed in the following reactions are :
(1)
(2)
(3)
(4)
217.
a-Chlorosodium acetate on bolling with aqueous sodium nitrite gives
(1)nitromethane
(2)α chloronitromethane
(3)nitroethane
(4)acctyl chloride.
218.
Predict respectively ' X ' and ' Y ' in the following reactions Ar−NH2→XAr−N+≡NCl−→YAr−Cl
(1)NaNO3 and Cl2
(2)NaNO3−HCl and HCl
(3)NaNO2−HCl and Cu/HCl
(4)NaNO2−HCl and NaNH2
219.
Consider the above chemical reaction andidentify product "A”
(1)
(2)
(3)
(4)
220.
The products A and B formed in the following reaction scheme are respectively
(1)
(2)
(3)
(4)
221.
Considering the above reaction, X and Y respectively are
(1)
(2)
(3)
(4)
222.
In the below given synthetic sequence, the product " C " is
(1)
(2)
(3)
(4)
223.
Identify the product ' Y ' in the following sequence of reactions.
(1)
(2)
(3)
(4)
224.
Nitration of which among the following compounds yields cyclonite?
(1)Formaldehyde
(2)Benzaldehyde
(3)Urotropine
(4)Acetaldehyde ammonia
225.
The major products P and Q formed in the following reactions of benzonitrile are
(1)
(2)
(3)
(4)
226.
Identify the major product formed in the following sequence of reactions :
(1)
(2)
(3)
(4)
227.
The products formed in the following reaction sequence are:
(1)
(2),CH3 – CHO ,CH3 - COOH
(3)
(4),CH3 - CHO
228.
Consider the following reactions. The compound [P] is: (i) NaNO2/HCl,0−5∘C (ii) β−naphthol/NaOH
(1)
(2)
(3)
(4)
229.
Reaction of propanamide with Br2 / KOH (aq) produces :
(1)Ethylnitrile
(2)Propylamine
(3)Propanenitrile
(4)Ethylamine
230.
Which of the following produces nitrogen gas after the reaction with nitrous acid?
(1)(CH3)3N
(2)C2H5NHC2H5
(3)(C2H5)3N
(4)C2H5NH2
231.
The sequence from the following that would result in giving predominantly 3,4,5− Tribromoaniline is:
(1)
(2)
(3)
(4)
232.
What is the correct sequence of reagents used for converting nitrobenzene into m- dibromobenzene?
(1)Sn/HCl/Br2/NaNO2/NaBr
(2)Sn/HCl/kBr/Br2/H+
(3)NaNO2/HCl/kBr/H+
(4)Br2/Fe/Sn/HCl/NaNO2/HCl/CuBr/HBr
233.
Consider the above reaction, the compound 'A' is
(1)
(2)
(3)
(4)
234.
4-Nitrotoluene (para-nitrotoluene) on reduction with Fe/HCl and then electrophilic bromination with an excess amount of Br2gives
(1)
(2)
(3)
(4)
235.
The major product in the following reaction is : +CH3Ibase
(1)
(2)
(3)
(4)
236.
product A and product B respectively are:
(1)
(2)
(3)
(4)
237.
Consider the following sequence of reactions
Total number of sp3 hybridised carbon atoms in the major product C formed is .
238.
Number of compounds which give reaction with Hinsberg's reagent is
239.
Xg of ethanamine was subjected to reaction with NaNO2/HCl followed by hydrolysis to liberate N2 and HCl. The HCl generated was completely neutralised by 0.2 moles of NaOH.X is_____ g.
240.
If 279g of aniline is reacted with one equivalent of benzenediazonium chloride, the maximum amount of aniline yellow formed will be ____ g. (nearest integer) (consider complete conversion).
