List of top Questions asked in AP EAPCET- 2022

Identify the correct statements from the following:
(a) The ionic product of water at \(100^\circ C\) is \(\lt 10^{-14}\).
(b) pH of a solution decreases with increasing temperature.
(c) \(NaH_2PO_4\) on hydrolysis gives a basic solution.
(d) \(NH_3\) can act both as Bronsted acid and base.

The mass of hydrogen in grams present in \(1.0\ \text{L}\) of pure water of density \(1.0\ \text{g cm}^{-3}\) is:

For a reaction to be spontaneous, the required conditions are:

The successive ionization enthalpies of an element \(X\) in \(\text{kJ mol}^{-1}\) are \(1012,\ 1907,\ 2955,\ 4955,\ 6275\) and \(21260\) respectively, the element \(X\) is:

The number of \(sp^2\), \(sp^3\) hybridised carbons in cumene, respectively are:

The ratio of rates of diffusion of Helium (\(He\)) to Hydrogen (\(H_2\)) is:

The correct order of dipole moment of the molecules \(NH_3\) (I), \(BF_3\) (II), \(H_2O\) (III), \(NF_3\) (IV) is:

Equivalent weights of \(KMnO_4\) and \(K_2Cr_2O_7\) in acidic medium are respectively. (Molecular weight of \(KMnO_4=M_A\) and Molecular weight of \(K_2Cr_2O_7=M_B\))

The spectral series formed when electrons of excited hydrogen atoms return to the third orbit from higher energy orbits is:

The logic gates in which all the inputs must be low to get a high output are:

The maximum amplitude of an AM wave is found to be \(20\ \text{V}\) while its minimum amplitude is \(4\ \text{V}\). The modulation index is:

The incorrect set of quantum numbers \((n,l,m,s)\) for an electron in \(3p\) orbital is:

Identify the elements \(x\) and \(z\) in the following representation. (Sb = antimony)

Microwaves are used in the following:

Statement (A): As one considers orbits with higher values of \(n\) in hydrogen atom, the electric potential energy of the atom increases.
Statement (B): In Thomson's model, an atom is a spherical cloud of positive charges with electrons embedded in it.
Statement (C): The orbital picture in Bohr's model of the hydrogen atom was consistent with the uncertainty principle.

The electric field associated with a monochromatic light wave is given by \[ E=E_0\sin\left[(1.57\times10^7\ \text{m}^{-1})(x-ct)\right] \] Then the stopping potential when this light is used in a photoelectric experiment with the metal having work function \(1.9\ \text{eV}\) is \([h=6.64\times10^{-34}\ \text{Js}]\):

A short bar magnet placed in a horizontal plane has its axis aligned along north-south direction. Null points are found on the axis of the magnet at \(20\ \text{cm}\) from the center of magnet. The earth's magnetic field at the place is \(B\) and angle of dip is \(0^\circ\). If the total magnetic field on the normal bisector of the magnet \(20\ \text{cm}\) from the center of the magnet is \(0.6\ \text{G}\), then the magnitude of \(B\) is:

A radioactive substance has a half life of \(10^8\) years and an activity of \(10^4\ \text{Bq}\). The number of atoms of this substance present is:

\(\dfrac{50}{\pi}\ \mu\text{F}\) capacitor is connected to a \(250\ \text{V},\ 50\ \text{Hz}\) AC supply. Then the rms current of the circuit is:

Two infinitely long wires are placed at \((1\text{ cm},1\text{ cm})\) and \((+1\text{ cm},-1\text{ cm})\) with \(1\text{ A}\) current in each and in the same directions perpendicular to the \(x-y\) plane. Let the magnetic field due to these current carrying wires at the origin be \(\vec{B}\). If \(B_0\) is the magnitude of the field if only one of them was present, then \(\dfrac{|\vec{B}|}{B_0}\) is:

Resonance frequency of an LCR series AC circuit is \(f_0\). Now inductance is reduced to \(\dfrac{1}{4}\) times and capacitance is increased to \(16\) times, then the resonance frequency becomes:

A galvanometer has a coil of resistance \(100\,\Omega\) showing a full scale deflection at \(50\,\mu\text{A}\). The resistance that should be added to use it as an ammeter of range \(10\,\text{mA}\) is

A particle of mass \(1\times10^{-27}\ \text{kg}\) and charge \(1\times10^{-16}\ \text{C}\) enters the uniform magnetic field inside a solenoid at speed \(1000\ \text{m s}^{-1}\). The velocity vector makes an angle \(60^\circ\) with the axis of the solenoid. The solenoid has \(5000\) turns along its length and carries current \(5\ \text{A}\). The number of revolutions the particle makes along the helical path within the solenoid by the time it emerges from the solenoid's opposite end is:

A long solenoid is carrying a current \[ I=I_0\sin(\omega t), \] having \(N\) turns per unit length and radius \(R\). A square loop is placed inside the solenoid with its plane perpendicular to the solenoid axis, and its corners touching the solenoid. Now the e.m.f induced in the square coil is:

A metal wire of \(1\) cm length and \(1\) mm radius has a resistance of \(3\times10^{-3}\ \Omega\). If a wire of the same metal of length \(3\) cm and radius \(0.5\) mm is drawn, the resistance of the wire is: