List of top Questions asked in AP EAMCET

At \(T\) K, the equilibrium constant for the reaction \[ {H}_2(g) + {Br}_2(g) \rightleftharpoons 2 {HBr}(g) \] is 1.6 \(\times\) 10\(^{1}\). If 10 bar of HBr is introduced into a sealed vessel at \(T\) K, the equilibrium pressure of HBr (in bar) is approximately:

The molar heats of fusion and vaporization of benzene are 10.9 and 31.0 kJ mol\(^{-1}\) respectively. The changes in entropy for the solid \(\rightarrow\) liquid and liquid \(\rightarrow\) vapor transitions for benzene are \(x\) and \(y\) J K\(^{-1}\) mol\(^{-1}\) respectively. The value of \(y(x)\) in J\(^2\) K\(^{-2}\) mol\(^{-2}\) is:

The volume of an ideal gas contracts from 10.0 L to 2.0 L under an applied pressure of 2.0 atm. During contraction, the system also evolved 90 J of heat. The change in internal energy (in J) involved in the system is (1 L·atm = 101.3 J):

What is the ratio of kinetic energies of \(3 \, {g}\) of hydrogen and \(4 \, {g}\) of oxygen at a certain temperature?

Among the following species, the correct set of isomolecular pairs are: \[ \mathrm{XeO}_3, \, \mathrm{CO}_3^{2-}, \, \mathrm{SO}_3, \, \mathrm{H}_3\mathrm{O}^+, \, \mathrm{ClF}_3 \]

Observe the following reactions. Identify the reaction in which the hybridisation of the underlined atom is changed:

Match the following elements with their correct classifications:

The graph shown below represents the variation of probability density, \( \Psi(r) \), with distance \( r \) of the electron from the nucleus. This represents:

If uncertainty in position and momentum of an electron are equal, then uncertainty in its velocity is:

If the energy gap of a substance is 5.4 eV, then the substance is:

The voltage gain and current gain of a transistor amplifier in common emitter configuration are respectively 150 and 50. If the resistance in the base circuit is 850 \(\Omega\), then the resistance in the collector circuit is:

One mole of radium has an activity of \( \frac{1}{6.3 \times 10^{37}} \) kilo curie. Its decay constant is:

The speed of the electron in a hydrogen atom in the \( n = 3 \) level is:

If the kinetic energy of a particle in motion is decreased by 36%, the increase in de Broglie wavelength of the particle is:

Inner shell electrons in atoms moving from one energy level to another lower energy level produce:

The ratio of the number of turns per unit length of two solenoids A and B is \(1:3\) and the lengths of A and B are in the ratio \(1:2\). If the two solenoids have the same cross-sectional area, the ratio of the self-inductances of the solenoids A and B is:

At a place where the magnitude of the earth's magnetic field is \(4 \times 10^{-5} \, T\), a short bar magnet is placed with its axis perpendicular to the earth's magnetic field direction. If the resultant magnetic field at a point at a distance of 40 cm from the center of the magnet on the normal bisector of the magnet is inclined at \(45^\circ\) with the earth's field, the magnetic moment of the magnet is:

Two long straight parallel conductors A and B carrying currents 4.5 A and 8 A respectively are separated by 25 cm in air. The resultant magnetic field at a point which is a distance of 15 cm from conductor A and 20 cm from conductor B is:

Three parallel plate capacitors of capacitances \(4 \mu F\), \(6 \mu F\), and \(12 \mu F\) are first connected in series and then in parallel. The ratio of the effective capacitances in the two cases is:

Three point charges \( +q, +2q, \) and \( +4q \) are placed along a straight line such that the charge \( +2q \) lies equidistant from the other two charges. The ratio of the net electrostatic force on charges \( +q \) and \( +4q \) is:

If a microscope is placed in air, the minimum separation of two objects seen as distinct is 6 µm. If the same is placed in a medium of refractive index 1.5, the minimum separation of the two objects to see as distinct is: