Q. The structure of the carbonyl compound P is
[IIT 2009]
[IIT 2009]
Q. The structure of the products Q and R, respectively, are
[IIT 2009]
[IIT 2009]
Q. The structure of the product S is
[IIT 2009]
[IIT 2009]
Paragraph for Questions Nos. 4 to 5 An acyclic hydrocarbon P, having molecular formula $\mathrm{C}_{6} \mathrm{H}_{10}$, gave acetone as the only organic product through the following sequence of reactions, in the which Q is an intermediate organic compound.
Q. The structure of compound P is –
[IIT 2011]
[IIT 2011]
Q. The structure of the compound Q is –
[IIT 2011]
[IIT 2011]
Q. The number of aldol reaction(s) that occurs in the given transformation is
[IIT 2012]
[IIT 2012]
Q. Among P, Q, R and S, the aromatic compound(s) is / are :
[IIT 2013]
[IIT 2013]
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Sol. (A,B,C,D)
Q. After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are)
(A) Reaction I : P and Reaction II : P
(B) Reaction I : U, acetone and Reaction II : Q acetone
(C) Reaction I : T, U, acetone and Reaction II : P
(D) Reaction I : R, acetone and Reaction II : S acetone
[IIT 2013]
(A) Reaction I : P and Reaction II : P
(B) Reaction I : U, acetone and Reaction II : Q acetone
(C) Reaction I : T, U, acetone and Reaction II : P
(D) Reaction I : R, acetone and Reaction II : S acetone
[IIT 2013]
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Sol. (C)
In basic medium halogenation dose not stop with replacement of just one hydrogen and poly halogenation takes place because -haloketones are more reactive towards base and haloform reaction takes place
In above reaction $\mathrm{Br}_{2}$ is limiting agents.
Q. The major product in the following reaction is
[IIT 2014]
[IIT 2014]
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Sol. (D)
(i) Grignard prefer to give nucleophilic addition on polar $\pi$-bond and form anion intermediate.
(ii) In next step anion give intramolecular nucleophilic substitution reaction & form 5 membered ring.
Q. The major product of the following reaction is –
[IIT 2015]
[IIT 2015]
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Sol. (A)
Mechanism :
Q. In the following reactions, the product S is –
[IIT 2015]
[IIT 2015]
Q. The reaction(s) leading to the formation of 1,3,5-trimethylbenzene is (are)
[JEE Adv. 2018]
[JEE Adv. 2018]
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Sol. (A,B,D)
Q. In the following reaction sequence, the amount of D (in g) formed from 10 moles of acetophenone is____.
(Atomic weight in g mol–1: H = 1, C = 12, N = 14, O = 16, Br = 80. The yield (%) corresponding to the product in each step is given in the parenthesis)
[JEE Adv. 2018]
[JEE Adv. 2018]
update 2019 and 2020 too
2nd paragraph options are wrong.
thanks . but please upload more number of questions
hey hi
Pls give us a detailed solutions
thanks
whys that alert appearing again nd again