Previous year questions with solutions · 2024 – 2026
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 20 | 19 | 1.1 | 4.21% ▼ 9.1% vs last year |
| 2025 | 22 | 19 | 1.2 | 4.63% ▲ 46.5% vs last year |
| 2024 | 19 | 21 | 0.9 | 3.16% |
An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with Cl2/h , (Y) gives only one monochlorinated product (Z). The total number of primary carbon atoms in (Y) is .
One mole of an alkane (x) requires 8 mole oxygen for complete combustion. Sum of number of carbon and hydrogen atoms in the alkane (x) is .
The cycloalkene (X) on bromination consumes one mole of bromine per mole of (X) and gives the product (Y) in which C : Br ratio is 3:1. The percentage of bromine in the product (Y) is %. (Nearest integer) (Given : molar mass in g mol-1 H : 1, C : 12, O : 16, Br : 80)
Identify the structure of the final product (D) in the following sequence of the reactions : [figure] Total number of sp2 hybridised carbon atoms in product D is .
Isomeric hydrocarbons negative Baeyer's test (Molecular formula C9H12) The total number of isomers from above with four different non-aliphatic substitution sites is -
A compound ' X ' absorbs 2 moles of hydrogen and ' X ' upon oxidation with KMnO4 | H+ gives [figure] The total number of bonds present in the compound ' X ' is .
The compound with molecular formula C6H6, which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has electrons.
Number of compounds from the following which cannot undergo Friedel-Crafts reactions is: toluene, nitrobenzene, xylene, cumene, aniline, chlorobenzene, m-nitroaniline, m-dinitrobenzene
The major product of the following reaction is P. CH3C C - CH3 [ (ii) dil. KMnO4 \ 273 K](i) Na/liq. NH3 'P' Number of oxygen atoms present in product 'P' is . (nearest integer)
Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is . [figure]
Number of alkanes obtained on electrolysis of a mixture of CH3COONa and C2H5COONa is .
Number of isomeric products formed by monochlorination of 2-methylbutane in presence of sunlight is .
[figure] Consider the given reaction. The total number of oxygen atom/s present per molecule of the product (P) is .
Among the following, total number of meta directing functional groups is (Integer based) -OCH3, -NO2, -CN, -CH3, -NHCOCH3, -COR, -OH, -COOH, -Cl