List of top Chemistry Questions asked in Maharashtra Class XII

Define Osmosis. How will you determine the molar mass of a non-volatile solute by elevation of boiling point?
Convert the following: i. Ethyl alcohol into ethyl acetate
ii. Phenol into benzene
iii. Diethyl ether into ethyl chloride
Define Extensive property. Calculate the work done during the expansion of 2 moles of an ideal gas from 10 dm^3 to 20 dm^3 at 298 K in vacuum.
Write the chemical reaction for the preparation of glucose from sucrose. Write structure of D-ribose.
Define: Acidic buffer solution. Write the relationship between solubility and solubility product for PbI\(_2\).
Calculate standard Gibbs energy change at 25°C for the cell reaction \[ \text{Cd(s)} + \text{Sn}^{2+}_{(aq)} \rightleftharpoons \text{Cd}^{2+}_{(aq)} + \text{Sn(s)} \] Given: \[ E^\circ_{\text{cd}} = -0.403V, \quad E^\circ_{\text{sn}} = -0.136V \]
Calculate the mole fraction of solute, if the vapour pressure of pure benzene at certain temperature is 640 mmHg and vapour pressure of solution of a solute in benzene is 600 mmHg.
Define Green chemistry. Write two advantages of nanoparticles and nanotechnology.
Write the correct condition for spontaneity in terms of Gibbs energy.
Calculate the molar conductivity for 0.5 M BaCl_2 if its conductivity at 298K is 0.01 \( \Omega^{-1} \text{cm}^{-1} \).
Distinguish between lanthanides and actinides.
Write the name of the platinum complex used in the treatment of cancer.
Write the chemical composition of cryolite.
Write the SI unit of cryoscopic constant.
Write the structure of the product formed when chlorobenzene is treated with sodium metal in the presence of dry ether.
The monomer of natural rubber is:
Write the name of the product formed by the action of \( \text{LiAlH}_4 \) ether on acetamide.
Ozonolysis of 2, 3 dimethyl but-2-ene, followed by decomposition by Zn dust and water gives:
The glycosidic linkage present in maltose is:
The product of the following reaction is:
The correct formula of a complex having IUPAC name Tetraaminedibromoplatinum (IV) bromide is:
The spin only magnetic moment of Mn\(^{2+}\) ion is:
The allylic halide, among the following is:
The pH of weak monoacidic base is 11.2, its OH\(^-\) ion concentration is:
The relation between radius of sphere and edge length in body centered cubic lattice is given by formula: