List of top Questions asked in AP EAPCET

Metal ‘M’ in the following reaction is:
\[ 2MNO_3 \rightarrow M_2O+2NO_2+\frac{1}{2}O_2 \]

The \(K_a\) values of A, B and C are \(1.8\times 10^{-4}\), \(5\times 10^{-10}\) and \(3\times 10^{-8}\) respectively. The correct order of their acidic strength is

For a reaction \[ 2CO(g)+O_2(g)\rightleftharpoons 2CO_2(g), \] \(\Delta_rG^\circ=-128\,\text{kJ}\) at \(300\,\text{K}\). If \(\Delta_rS^\circ\) of the reaction is \(-40\,\text{J K}^{-1}\), calculate \(\Delta_rU\) of the reaction.

Which of the following equations are correct?
\[ (A)\ U=H-PV \] \[ (B)\ G=H-TS \] \[ (C)\ U=q+W \]

Find the false statement for ideal gases.

Which of the following reactions is not a disproportionation reaction?

Which of the following is not a disproportionation reaction?

For a reaction \[ A(g)+\frac{1}{2}B(g)\rightleftharpoons C(g)+\text{heat} \] favorable conditions for the reaction to occur in the forward direction are

The combination of which of the following gives an ionic compound with maximum covalent character:

The tetra atomic molecules/ions with different shapes are

The wavelength of electron in the first orbit of hydrogen atom is \[ 3.3\times10^{-10}\,\text{m}. \] The kinetic energy of electron (in J) is:
\[ (h=6.6\times10^{-34}\,\text{Js},\ m_e=9.0\times10^{-31}\,\text{kg}) \]

Maximum number of electrons possible with spin quantum number \[ +\frac{1}{2} \] with principal quantum number \(n=4\) in an atom is:

The number of valence electrons present in an element with atomic number \(117\) is

In which of the following, the elements Al, B, Mg and K are correctly arranged in the increasing order of their metallic character?

The ratio of radii of \(3^{rd}\) and \(6^{th}\) Bohr's orbit in a hydrogen atom is

The correct order of electromagnetic waves with increasing frequency is

The frequency of the light emitted when an electron comes down from \(n=4\) to \(n=2\) level in hydrogen atom is \(\dfrac{3}{7}\) times of the following transition of the Li atom:

A particle of mass \[ 2\times10^{-27}\,\text{kg} \] has de-Broglie wavelength of \[ 3.3\times10^{-10}\,\text{m}. \] The kinetic energy of this particle is:
\[ \text{(Planck’s constant } h=6.6\times10^{-34}\,\text{J-s)} \]

The values of \(Y\) and \(Z\) in the given logic circuit are

The frequency suitable for beyond the horizon communication using sky wave is

A \(70\,\text{mH}\) inductor is connected to \(220\,\text{V},\ 50\,\text{Hz}\) AC supply. The rms value of the current in the circuit is:

An isosceles triangular current carrying loop is kept perpendicularly in a uniform magnetic field \(B_0\), as shown in figure. The force on the loop due to magnetic field is

A charged particle moving in a uniform magnetic field penetrates a layer of lead and thereby loses half of its kinetic energy, then the radius of curvature of its path is:

A short bar magnet placed with its axis at \(45^\circ\) with a uniform external magnetic field of \(28.3\times 10^{-3}\,T\) experiences a torque of magnitude equal to \(3.6\times 10^{-5}\,J\). The magnitude of magnetic moment of the magnet is nearly

A plane electromagnetic wave of frequency \(50\,MHz\) travels in free space. If the average energy densities in the electric field and magnetic field are \(K_E\) and \(K_B\) respectively, then