List of top Questions asked in Maharashtra Class XII- 2026

Define : Isotonic solution
The rate of A + B \(\rightarrow\) P is \(3.6 \times 10^{-2}\) mol/\(dm^3\)/s. When [A] = 0.2 M and [B] = 0.1 M. Calculate the rate constant if reaction is first order in B and second order in A.
Draw the structure of 2, 4 - dinitrophenylhydrazone of acetaldehyde.
Write preparation of glucose from starch.
Define : Common ion effect.
Write the structure of zwitter ion of sulfanilic acid. Write the reaction between benzene diazonium chloride and phenol in alkaline medium.
Write the postulates of Werner's theory of co-ordination complexes.
The salt of \(Sc^{3+}\) ion is colourless and the salt of \(Mn^{3+}\) ion is coloured. Explain. [Z of Sc = 21 and Z of Mn = 25]
What is the action of ethane-1, 2 - diol on acetone?
Write Tollen's reagent test for acetaldehyde.
Calculate the work done in oxidation of 2 moles of \(SO_2\) at 298 K, if \(SO_{2(g) + \frac{1}{2}O_{2(g)} \rightarrow SO_{3(g)}\) [Given : R = 8.314 J/K/mol].}
Write the formula to measure % atom economy according to green chemistry.
Write a reaction for preparation of Nylon-6.
Convert : (a) Benzene into benzaldehyde, (b) Cyclohexene into adipic acid.
Write examples of coordination metal complexes in biology.
Define Green chemistry.
Write observed electronic configuration of chromium (Z = 24).
Calculate magnetic moment of \(Ti^{3+}\) by using spin only formula. (Z of Ti = 22)
Write general characteristics of interhalogen compounds.
What is peptide linkage?
Convert Ethanol into sodium ethoxide.
Convert Phenol into o-phenol sulfonic acid.
Explain amphoteric nature of water.
Convert Bromomethane into methoxyethane.
Write statement of second law of thermodynamics.