List of top Questions asked in Maharashtra Class XII

Define : Isotonic solution
Draw the structure of 2, 4 - dinitrophenylhydrazone of acetaldehyde.
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.
Write the structure of zwitter ion of sulfanilic acid. Write the reaction between benzene diazonium chloride and phenol in alkaline medium.
Write preparation of glucose from starch.
Define : Common ion effect.
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 the postulates of Werner's theory of co-ordination complexes.
Write Tollen's reagent test for acetaldehyde.
Write a reaction for preparation of Nylon-6.
Write the formula to measure % atom economy according to green chemistry.
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].}
Convert : (a) Benzene into benzaldehyde, (b) Cyclohexene into adipic acid.
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.
Define Green chemistry.
Write examples of coordination metal complexes in biology.
Convert Ethanol into sodium ethoxide.
Explain amphoteric nature of water.
What is peptide linkage?
Convert Bromomethane into methoxyethane.
Convert Phenol into o-phenol sulfonic acid.
Write statement of second law of thermodynamics.