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Alkenes
- Advanced 2026ChemistryList match
The List-II contains products obtained from the reaction of compounds in List-I with /Zn- followed by cyclization (via more stable enolate) in the presence of aqueous NaOH. Match each entry in List-I with appropriate entry in List-II and choose the correct option.
- Advanced 2026ChemistrySingle correct
Natural rubber on complete ozonolysis (/Zn-) gives compound X as the major product. X gives positive iodoform and Tollen's tests. X on heating with aqueous NaOH gives Y as the major product. Y is
- Main 2026ChemistrySingle correct
An alkene (X) on ozonolysis followed by reduction gives following products.
(2 moles), ,
The alkene (X) is:
- Main 2026ChemistrySingle correct
Compound (X) is subjected to the sequence of reactions as shown above. Molar mass of the major product (Y) formed is ________ g mol.
(Given molar mass in g mol C:12, H: 1, O: 16) - Main 2026ChemistrySingle correct
"P" is a hydrocarbon of molecular formula:- . On ozonolysis, "P" forms "Q". "Q" on treatment with alkali under reflux condition produces "R", which on treatment with /NaOH gives a yellow precipitate. Acidification of the solution gives "S". The structure of "S" is given below:-
The correct structure of "P" is
- Main 2026ChemistrySingle correct
Consider compounds A, B and C with following structural formulae
A =
B =
C =
For the conversion of B from A, reagent (D) required is ________ and structural formula of product (E) obtained when C undergoes same reaction using excess reagent (D) is ________. - Main 2026ChemistrySingle correct
IUPAC name of the some alkenes are given below.
Find out the correct stability order.A. 2-Methylbut-2-ene
B. cis-But-2-ene
C. 2, 3-Dimethylbut-2-ene
D. Prop-1-ene
Choose the correct answer from the options given below :
- Main 2026ChemistrySingle correct
value for 2-methylpropene in a solvent system (Ethyl acetate + ether) is 0.42. 2-methylpropene is treated with dilute to give major organic product (X). value for (X) in the same solvent system under identical condition will be:
- Main 2026ChemistrySingle correct
Given below are two statements:
Statement I: 3-phenylpropene reacts with HBr and gives secondary alkyl bromide having a chiral carbon atom as the major product.
Statement II: Aryl chlorides and aryl cyanides can be prepared by Sandmeyer reaction as well as Gattermann reaction.
In the light of the above statements, choose the correct answer from the options given below
- Advanced 2025ChemistryMultiple correct
For the reaction sequence given below, the correct statement(s) is(are)
(In the options, X is any atom other than carbon and hydrogen, and it is different in P, Q and R)
- Advanced 2025ChemistrySingle correct
Monocyclic compounds P, Q, R and S are the major products formed in the reaction sequences given below.
The product having the highest number of unsaturated carbon atom(s) is
- Advanced 2025ChemistrySingle correct
The correct reaction/reaction sequence that would produce a dicarboxylic acid as the major product is
- Advanced 2024ChemistryList match
List-I contains various reaction sequences and List-II contains the possible products. Match each entry in List-I with the appropriate entry in List-II and choose the correct option.
- Advanced 2024ChemistryNumerical
Sum of number of oxygen atoms in S and T is _____.
- Advanced 2023ChemistryMultiple correct
Consider the following reaction scheme and choose the correct option(s) for the major products Q, R and S.
- Advanced 2023ChemistryInteger
The reaction of 4-methyloct-1-ene (P, 2.52 g) with HBr in the presence of gives two isomeric bromides in a 9 : 1 ratio, with a combined yield of 50%. Of these, the entire amount of the primary alkyl bromide was reacted with an appropriate amount of diethylamine followed by treatment with aq. to give a non-ionic product S in 100% yield.
The mass (in mg) of S obtained is _____.
[Use molar mass (in ): H = 1, C = 12, N = 14, Br = 80]
- Advanced 2022ChemistryInteger
The number of (methylene) groups in the product formed from the following reaction sequence is ________.
- Advanced 2022ChemistryInteger
The total number of chiral molecules formed from one molecule of on complete ozonolysis is ________.
- Main 2022ChemistryInteger
The major product 'A' of the following given reaction has ______ hybridized carbon atoms.
- Main 2022ChemistrySingle correct
Given below are two statements.
Statement I: The presence of weaker -bonds make alkenes less stable than alkanes.
Statement II: The strength of the double bond is greater than that of carbon-carbon single bond.
In the light of the above statements, choose the correct answer from the options given below.