List of top Questions asked in AP EAPCET

In amplitude modulation of waves, the maximum amplitude is $30~\text{mV}$ and minimum amplitude is $5~\text{mV}$, then the modulation index is

Choose the incorrect statement from the following

Match the following pollutants with their corresponding control methods.

Pollutants Control
A) Particulate matter I) Catalytic converter
B) Carbon monoxide II) Scrubber
C) Sulphur dioxide III) Incinerators
D) Hospital wastes IV) Electrostatic precipitator

How many of the following molecules / ions have a trigonal planar structure?
$ \text{BO}_3^{3-}, \, \text{NH}_3, \, \text{PCl}_3, \, \text{BCl}_3, \, \text{ClF}_3, \, \text{XeO}_3 $

The correct order of increasing bond lengths of C--H, O--H, C--C, and H--H is

The layer of the atmosphere that reflects low frequency (LF) electromagnetic waves during daytime only is

As shown in the figure, the work done to move the charge 'Q' from point C to point D along the semi-circle CRD is

The magnetic field at the center of a long solenoid having 400 turns per unit length and carrying a current $I = 6.24 \times 10^{-7$ A is}

The enthalpy change (ΔH) for the reaction N₂(g) + 3H₂(g) → 2NH₃(g) is -92 kJ/mol.

What is the enthalpy change for the decomposition of 1 mol of NH₃(g) into its elements?

The height of ceiling in an auditorium is 30 m. A ball is thrown with a speed of $ 30 \, \text{m s}^{-1} $ from the entrance such that it just moves very near to the ceiling without touching it and then it reaches the ground at the end of the auditorium. Then the length of auditorium is [Acceleration due to gravity $ = 10 \, \text{m s}^{-2} $]

If the tension in the horizontal wire shown in the figure is 30 N, then the weight $ W $ and tension in the wire $ OA $ are respectively:

If the maximum amplitude of a modulated wave is three times its minimum amplitude, then the modulation index of the wave is

This vaccine is a toxoid.

The force between two point charges kept with a separation of 9 cm in air is 98 N. If a dielectric slab of constant 4, thickness 6 cm and another dielectric slab of constant 9, thickness 3 cm are introduced between the two charges, then the new force becomes

If four moles of hydrogen and two moles of helium form a gaseous mixture, then the molar specific heat capacity of the mixture at constant pressure is

A body A of mass 200 g moving with a velocity $\vec{v}_1 \hat{i}$ makes collision with another body B of mass 100 g moving with a velocity $\vec{v}_2 \hat{i}$. After collision, A and B move with velocities $\vec{v}_3 \hat{i}$ and $\vec{v}_4 \hat{i}$ respectively. If $v_3 = 0.5v_1$, then the value of $v_1$ is

How many atoms are present in 1 mole of oxygen gas (O₂)?

The sum of two point positive charges separated by a distance of 1.5 m in air is $ 25 \, \mu\text{C} $. If the electrostatic force between the two charges is 0.6 N, then the difference between the two charges is

If the de Broglie wavelength of an electron is $ 2 \, \text{nm} $, then its kinetic energy is nearly (Planck's constant $ = 6.6 \times 10^{-34} \, \text{J s} $ and mass of electron $ = 9 \times 10^{-31} \, \text{kg} $)

At T(K), $ K_c $ value for $ \text{AO}_2(g) + \text{BO}_2(g) \rightleftharpoons \text{AO}_3(g) + \text{BO}(g) $ is 16. In a closed 1 L flask, one mole each of $ \text{AO}_2 $, $ \text{BO}_2 $, $ \text{AO}_3 $, and $ \text{BO} $ are taken and heated to T(K). What is the concentration (in mol L$^{-1}$) of $ \text{AO}_3 $ at equilibrium?

What is the drug used to control depression and hypertension?

The metal purified by Mond process is X. The number of unpaired electrons in X is

The difference between the radii of $3^{rd}$ and $2^{nd}$ orbit of H-atom is x pm. The difference between the radii of $4^{th}$ and $3^{rd}$ orbit of $ \text{Li}^{2+} $ ion is y pm. $y:x$ is equal to

If a proton and an alpha particle are accelerated through the same potential difference, then the ratio of their de Broglie wavelengths is:

The energy required to increase the temperature of 180 g of liquid water from 10$^\circ$C to 15$^\circ$C is 3765 J. What is $C_p$ of water in J mol$^{-1}$ K$^{-1}$? ($H_2O$ = 18 u)