List of top Questions asked in Maharashtra Class XII- 2023

Explain anomalous behaviour of oxygen in group 16 with respect to:
i. Atomicity
ii. Magnetic property
iii. Oxidation state
Write chemical reactions for the following conversions:
i. Acetic acid into acetic anhydride
ii. Acetic acid into ethyl alcohol
Write IUPAC name and structure of methylphenylamine.
Show that, time required for 99.9 percent completion of a first order reaction is three times the time required for 90 percent completion. Give electronic configuration of Gd (Z = 64). Write the name of nano structured material used in car tyres to increase the life of tyres.
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 reactions for the formation of nylon 6,6 polymer.
Draw structures of the following compounds:
i. Chloric acid
ii. Peroxydisulphuric acid
Define Osmosis. How will you determine molar mass of non-volatile solute by elevation of boiling point?
A weak monobasic acid is 10 percent dissociated in 0.05 M solution. What is percent dissociation in 0.15 M solution?
2000 mmol of an ideal gas expanded isothermally and reversibly from 20 L to 30 L at 300 K, calculate the work done in the process (\( R = 8.314 \, \text{J K}^{-1} \text{mol}^{-1} \)).
Define: Green chemistry. Write two advantages of nanoparticle and nanotechnology.
Explain the following terms:
i. Substitutional impurity defect
ii. Interstitial impurity defect
Define: Acidic buffer solution. Write the relationship between solubility and solubility product for PbI\(_2\).
What is the action of the following reagents on ethyl amine:
i. Chloroform and caustic potash
ii. Nitrous acid
Write chemical reaction for the preparation of glucose from sucrose. Write structure of D-ribose.
Write the name of the technique used to know geometry of nanoparticles.
Write the name of the product formed by the action of LiAlH4/ether on acetamide.
Write the structure of the product formed when chlorobenzene is treated with sodium metal in the presence of dry ether.
Write the chemical composition of cryolite.
Write the name of platinum complex used in the treatment of cancer.
Write the correct condition for spontaneity in terms of Gibbs energy.
Calculate 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.
The spin only magnetic moment of Mn\(^{2+}\) ion is _______.
The correct formula of a complex having IUPAC name Tetraamminedibromoplatinum (IV) bromide is _______.
The allylic halide, among the following is _______.