List of top Questions asked in AP EAMCET

A bar magnet of moment \(0.4 \times 10^{-3} \, {Am}^2\) is kept in a magnetic field of \(2\pi \times 10^{-3} \, {T}\). The magnet makes an angle of \(45^\circ\) with the direction of magnetic field. The torque acting on the magnet is:
Identify the basic oxide from the following
The validity of Freundlich isotherm can be verified by plotting:
Which one of the following sets is not correctly matched?
When chlorine reacts with hot and conc. NaOH, the products formed are
The diffraction pattern of a crystalline solid gave a peak at \( 2\theta = 60^\circ \). What is the distance (in cm) between the layers that gave this peak? \[ \text{(Given: Wavelength } \lambda = 1.544\text{ Å, } \sin 30^\circ = 0.5, \sin 60^\circ = 0.866, n=1) \]
The \( E^\Theta \) of \( M^{2+}|M \) is 0.3 V. At what concentration of \( Cu^{2+} \) (in mol \( L^{-1} \)), the \( E_{\text{cell}} \) value becomes zero?
\( \left(\frac{2.303RT}{F} = 0.06\right) \) (Conc. of \( M^{2+} = 0.1M \)).
In which of the following reactions, dihydrogen is not evolved?
Arrange the following pesticides in the chronological order of their release into the market: A: Organophosphates
B: Organochlorides
C: Sodium chlorate
Aluminium carbide on reaction with \( D_2O \) gives \( Al(OD)_3 \) and ‘X’. What is ‘X’?
The correct formula used to determine the formal charge (\( Q_f \)) on an atom in the given Lewis structure of a molecule or ion is (V = number of valence electrons in free atom, U = number of unshared electrons on the atom, B = number of bonds around the atom)
RMS velocity of one mole of an ideal gas was measured at different temperatures. A graph of \( (u_{\text{rms}})^2 \) (on y-axis) and \( T/K \) (on x-axis) gave a straight line passing through the origin, and its slope is \( 249 \, \text{m}^2 \text{s}^{-2}\text{K}^{-1} \). What is the molar mass (in kg mol\(^{-1}\)) of the ideal gas? \(( R = 8.3 \, \text{J mol}^{-1} \text{K}^{-1} )\)
Identify the incorrect statements from the following: I. \( \Delta S_{\text{system}} = (\Delta S_{\text{total}} + \Delta S_{\text{sur}}) \) II. \( A(l) \rightarrow A(s) \); for this process entropy change decreases III. Entropy units are \( J \ K^{-1} \ mol^{-1} \)
Correct set of four quantum numbers for the valence electron of strontium (Z = 38) is
The bond lengths of diatomic molecules of elements X, Y, and Z respectively are 143, 110, and 121 pm. The atomic numbers of X, Y, and Z respectively are:
If the maximum and minimum voltages of an A.M wave are \( V_{\max} \) and \( V_{\min} \) respectively, then the modulation factor ‘m’ is
A mixture consists of two radioactive materials \( A_1 \) and \( A_2 \) with half-lives of 20 s and 10 s respectively. Initially, the mixture has 40 g of \( A_1 \) and 160 g of \( A_2 \). The amount of the two in the mixture will become equal after
If \( n_e \) and \( n_h \) are concentrations of electrons and holes in a semiconductor, then the intrinsic carrier concentration (\( n_i \)) in thermal equilibrium is
If the bonding energy of the electron in a hydrogen atom is 13.6 eV, then the energy required to remove an electron from the first excited state of Li\(^{2+}\) is
Energy required to remove an electron from an aluminium surface is 4.2 eV. If light of wavelength 2000 Å falls on the surface, the velocity of the fastest electron ejected from the surface will be
An electron is moving with a velocity \( (2\hat{i} + 3\hat{j}) \) m/s in an electric field \( (3\hat{i} + 6\hat{j} + 2\hat{k}) \) V/m and a magnetic field \( (2\hat{j} + 3\hat{k}) \) T. The magnitude and direction (with x-axis) of the Lorentz force acting on the electron is
In a region, the electric field is \( (30\hat{i} + 40\hat{j}) \) NC\(^{-1}\). If the electric potential at the origin is zero, the electric potential at the point (1 m, 2 m) is
Drift speed \( v \) varies with the intensity of the electric field \( E \) as per the relation
In Young’s double-slit experiment with monochromatic light of wavelength 6000 Å, the fringe width is 3 mm. If the distance between the screen and slits is increased by 50\% and the distance between the slits is decreased by 10\%, then the fringe width is
Two point charges +6 \(\mu\)C and +10 \(\mu\)C kept at a certain distance repel each other with a force of 30 N. If each charge is given an additional charge of -8 \(\mu\)C, the two charges