List of top Questions asked in Maharashtra Class XII- 2023

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 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 the platinum complex used in the treatment of cancer.
Write the SI unit of cryoscopic constant.
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 spin only magnetic moment of Mn\(^{2+}\) ion is:
The correct formula of a complex having IUPAC name Tetraaminedibromoplatinum (IV) bromide 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:
An electric dipole consists of two opposite charges each of magnitude 1 µC, separated by 2 cm. The dipole is placed in an external electric field of \( 10^5 \, \text{N/C} \). Calculate the:
(i) maximum torque experienced by the dipole
(ii) work done by the external field to turn the dipole through 180°
On the basis of kinetic theory of gases, obtain an expression for pressure exerted by gas molecules enclosed in a container on its walls.
Derive an expression for energy stored in the magnetic field in terms of induced current.
Derive an expression for the work done during an isothermal process.
Derive expressions for linear velocity at lowest position, mid-way position, and the top-most position for a particle revolving in a vertical circle, if it has to just complete circular motion without string slackening at the top.
Explain the use of potentiometer to determine the internal resistance of a cell.
State the differential equation of linear S.H.M. Hence, obtain expression for:
(i) Acceleration
(ii) Velocity
Correct Answer: The differential equation of linear simple harmonic motion (S.H.M.) is \( m \frac{d^2x}{dt^2} = -kx \). From this, we can derive the expressions for acceleration and velocity.