Main 96 · Advanced 88
Hydrocarbons
- Main 2026ChemistrySingle correct
Given below are two statements:
Statement I: Methane can be prepared by decarboxylation of sodium ethanoate, Kolbe's electrolysis of sodium acetate and reaction of with water.
Statement II: Methane cannot be prepared from unsaturated hydrocarbons and by Wurtz reaction.
In the light of the above statements, choose the correct answer from the options given below
- 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
- Main 2026ChemistrySingle correct
Consider the following sequence of reactions
The major product P is:
- Main 2026ChemistrySingle correct
'' is the product which is obtained by the hydrolysis of prop-1-yne in the presence of mercuric sulphate under dilute acidic medium at 333 K. '' is the product which is obtained by the reaction of ethane nitrile with methyl magnesium bromide in dry ether followed by hydrolysis. IUPAC name of product obtained from '' and '' in the presence of barium hydroxide followed by heating is :
- Main 2026ChemistrySingle correct
An optically active alkyl bromide , reacts with ethanolic KOH to form major compound [A] which reacts with bromine to give compound [B]. Compound [B] reacts with ethanolic KOH and sodamide to give compound [C]. One molecule of water adds to compound [C] on warming with mercuric sulphate and dilute sulphuric acid at 333 K to form compound [D]. The functional group in compound D will be confirmed by :
- Main 2026ChemistrySingle correct
Consider the following reactions. Total number of electrons in the bonds and lone pair of electrons in the product (X) is :
- Main 2026ChemistryInteger
An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with , (Y) gives only one monochlorinated product (Z). The total number of primary carbon atoms in (Y) is ________.
- Main 2026ChemistrySingle correct
The major product of which of the following reaction is not obtained by rearrangement reaction ?
- Main 2026ChemistrySingle correct
n-Butane on monochlorination under photochemical condition gives an optically active compound "P". "P" on further chlorination gives dichloro compounds.
The number of dichloro compounds obtained (ignore stereoisomers) is :
- 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 2025ChemistryMultiple correct
For the reaction sequence given below, the correct statement(s) is(are)
- Advanced 2024ChemistryInteger
In the following reaction sequence, the major product P is formed.
Glycerol reacts completely with excess P in the presence of an acid catalyst to form Q. Reaction of Q with excess NaOH followed by the treatment with yields Ca-soap R, quantitatively. Starting with one mole of Q, the amount of R produced in gram is _____.
[Given, atomic weight: H = 1, C = 12, N = 14, O = 16, Na = 23, Cl = 35, Ca = 40]
- 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 2024ChemistryList match
List-I contains various reaction sequences and List-II contains different phenolic compounds. Match each entry in List-I with the appropriate entry in List-II and choose the correct option.
- Advanced 2024ChemistrySingle correct
In the following reaction sequence, the major product Q is
- Advanced 2024ChemistryMultiple correct
The option(s) with correct sequence of reagents for the conversion of P to Q is(are)
- Advanced 2024ChemistryNumerical
Sum of number of oxygen atoms in S and T is _____.
- Advanced 2023ChemistryMultiple correct
In the following reactions, P, Q, R, and S are the major products.
The correct statement(s) about P, Q, R, and S is(are)