List of top Questions asked in AP EAPCET

In acid medium dichromate oxidizes sulphite to sulphate as shown below. Identify correct statements about this balanced equation:
\[ x {Cr}_2{O}_7^{2-} + y {SO}_3^{2-} + z {H}^+ \rightarrow a {Cr}^{3+} + b {SO}_4^{2-} + c {H}_2{O} \] Statements:
I) Sum of $x$ and $y$ is (4)
II) Sum of $a$ and $c$ is equal to $(3 + b)$.
III) Sum of $x$, $y$, and $z$ is 11.

At what temperature rms speed of ${SO}_3$ molecules is $3.16 \times 10^2 \, {ms}^{-1}$? (R = 8.314 J K$^{-1}$ mol$^{-1}$)

For one mole of an ideal gas, three isochors were obtained at $V_1, V_2$ and $V_3$ respectively. Their slopes are $m_1, m_2$ and $m_3$. If $V_1<V_2<V_3$, then the correct relationship of slopes is:

The increasing order of covalent character of $\mathrm{NaCl}$ (I), $\mathrm{RbCl}$ (II), $\mathrm{MgCl}_2$ (III), $\mathrm{AlCl}_3$ (IV) is:

Observe the following molecules:
${SO}_2, {H}_2{O}, {HgCl}_2, {BeCl}_2, {XeF}_2, {O}_3, {NO}_2, {PbCl}_2$.
The number of molecules with the same geometry as that of ${SnCl}_2$ is:

A spectral line of Lyman series of H-atom has a frequency of $2.466 \times 10^{15} \, {s}^{-1}$. What is the transition responsible for this spectral line? (Rydberg constant $R = 1.096 \times 10^7 \, {m}^{-1}$)

The circuit consisting of NAND gates that is equivalent to an AND gate is:

Two diodes with zero resistance in forward bias and infinite resistance in reverse bias are connected to a battery as shown in the circuit. Then the value of current $i$ is:

The equation for ²³₁₀Ne nucleus which decays by β-emission is:

When an electron beam of energy 10.2 eV is used to excite hydrogen gas, then the possible spectral line is:

A particle is moving with a velocity four times the velocity of an electron. If the de Broglie wavelength of the particle is $1.5 \times 10^{-4}$ times the de Broglie wavelength of the electron, then the mass of the particle is (mass of electron $= 9 \times 10^{-31} \, {kg}$):

The electric field between the plates of a parallel plate capacitor changes at the rate of $4.5 \times 10^{7} \, {V/m/s}$. If the plates of the capacitor are circular with radius 2 cm, then the displacement current inside the capacitor is:

The device constructed based on the laws of electromagnetic induction is:

Two identical short bar magnets, each having a magnetic moment of $1 \, {A} \cdot {m}^2$, are placed 2 m apart between their centers with their axes perpendicular to each other. The net magnetic field at the midpoint of the line joining the centers of the two magnets is:

The magnetic force per unit length acting on a wire carrying a current of $4\sqrt{3}$ A and making an angle of $60^\circ$ with the direction of a uniform magnetic field of 200 mT is:

The magnetic field at a point $ P $ at a distance of 2 cm from a long straight wire of diameter 0.5 mm carrying a current of 1 A is $ B $. If the diameter of the wire is doubled without changing the current, the magnetic field at the same point $ P $ is:

The distance travelled by an electron in time of $3\,{ns}$ when accelerated from rest in an electric field of $0.9 \times 10^4\, {N/C}$ is: \[ {(mass of electron } = 9 \times 10^{-31} { kg, charge } = 1.6 \times 10^{-19} { C)} \]

To decrease the capacitance of a parallel plate capacitor:

As shown in the figure, a rod AB of length 5 cm is placed in front of a convex mirror on its principal axis. If the radius of curvature of the mirror is 20 cm, then the length of the image of the rod is:

A closed vessel contains a gas at a pressure $P$. If 50% of the mass of the gas is removed and rms speed of the gas molecules is increased by 20%, then the pressure of the remaining gas is

The thermodynamic process in which the change in internal energy of the system becomes zero is

When a polyatomic gas is heated at constant pressure, the percentage of heat given to the gas that is converted into external work is
(Ratio of the specific heat capacities of the gas = $\frac{4}{3}$)

A solid sphere at a temperature of 400 K radiates a power $P$. If the radius of the sphere is halved and its absolute temperature is doubled, then the power radiated by it is

The work to be done to blow a soap bubble of radius $3 \times 10^{-3}$ m is nearly
(Surface tension of soap solution = $20 \times 10^{-3}$ N m$^{-1}$)

A person of mass 45 kg having leg bones each of length 50 cm and area of cross-section of 5 cm$^2$ jumps safely from a height of 2 m. If his leg bones can withstand a stress of $0.9 \times 10^8$ N m$^{-2}$, then the Young’s modulus of the leg bones is
(Acceleration due to gravity $g = 10$ m s$^{-2}$)