List of top Questions asked in AP EAPCET- 2026

Identify the end product \(Z\) in the given sequence of reactions \[ C_3H_6 \xrightarrow[\left(C_6H_5COO\right)_2]{HBr} X \] \[ X \xrightarrow[\text{Anhy. }AlCl_3]{C_6H_6} Y \] \[ Y \xrightarrow[(iii)\ NaOH/CaO,\Delta]{(i)\ KMnO_4/OH^- \;\; (ii)\ H_3O^+} Z \]

At \(298\,K\), for the reaction \[ N_2(g)+3H_2(g)\rightleftharpoons 2NH_3(g) \] \[ \Delta H=-92.4\ \text{kJ} \] and \[ \log K_c=5.75. \] What is the entropy change \((\Delta S)\) (in J K\(^{-1}\)) for this reaction at the same temperature? \[ (R=8.3\ \text{J K}^{-1}\text{mol}^{-1}) \]

Observe the following unbalanced reactions \[ KO_2 \xrightarrow{\;HOH\;} X + Y\uparrow + KOH \] \[ KMnO_4 \xrightarrow[\text{basic medium}]{\;X\;} Y + Z + KOH + H_2O \] Y and Z are respectively

The reaction between \(X\) and \(Y\) produces a solid substance and a mixture of two gases, one of which is a colourless toxic gas. \(X\) and \(Y\) respectively are

Identify the sets in which both the metals react with water? \[ \text{I.}\quad Be,\ Mg \] \[ \text{II.}\quad Li,\ Mg \] \[ \text{III.}\quad Na,\ K \] \[ \text{IV.}\quad K,\ Ca \]

At \(450\,K\), for the reaction \[ 2SO_2(g)+O_2(g)\rightleftharpoons 2SO_3(g), \] the value of \[ K_p=2.0\times10^{10}. \] What is the value of \(K_c\) for the decomposition of sulphur trioxide at the same temperature? \[ R=0.083\ \text{L bar mol}^{-1}\text{K}^{-1} \]

Identify the correct statements from the following I) \[ \text{Conjugate base of nitrous acid is } NO_2^{-} \] II) \[ \text{The concentration of } OH^{-} \text{ ions in } 0.1\,M \text{ aqueous pyridine solution is } \sqrt{2}\times10^{-5}\,M \] \[ (K_b \text{ of pyridine }=2\times10^{-9}) \] III) The acid strength of aqueous hydrogen halides follows \[ HF \gt HCl \gt HBr \gt HI \]

Which of the following sets contain isostructural molecules? I. \[ H_2O,\ OF_2,\ SCl_2 \] II. \[ CO_2,\ BeCl_2,\ HgCl_2 \] III. \[ SiCl_4,\ SF_4,\ XeF_4 \]

At \(298\,K\), the value of \((\Delta H-\Delta U)\) for the combustion of 1 mole of \[ C_4H_{10}(g) \] is \(x\) kJ and for the combustion of 1 mole of glucose, the value of \[ (\Delta H-\Delta U) \] is \(y\) kJ. The value of \((x-y)\) (in kJ) is \[ (R=8.3\ \text{J K}^{-1}\text{mol}^{-1}) \]

Formal charge on sulphur atom in the following three Lewis structures I, II and III respectively is \[ \text{I.}\quad \ddot{S}=C=\ddot{N} \] \[ \text{II.}\quad :S-C\equiv N: \] \[ \text{III.}\quad :S\equiv C-N: \]

\(x\) mL of \(0.05\,M\) \(KMnO_4\) solution is required to oxidise completely \(1.52\) g of \(FeSO_4\) in acidic medium. The value of \(x\) is \[ (\text{Atomic weights: } Fe=56,\ S=32,\ O=16) \]

Which of the following statements are correct? I. In the third period, two elements have higher ionization enthalpy than the element immediately following them in the same period. II. Electronegativity of carbon is higher than that of phosphorus. III. An element \(X\) belongs to group 14 and period 3. The number of electrons present in it is \(14\).

At \(27^\circ C\), a real gas of molar mass \[ 44\ \text{g mol}^{-1} \] occupies a volume of \[ 0.4\ \text{L} \] at a pressure of \[ 40\ \text{atm}. \] If the compressibility factor is \[ Z=0.65, \] what is its weight (in g)? \[ (R=0.082\ \text{L-atm K}^{-1}\text{mol}^{-1}) \]

Threshold frequencies of the metals \(A\) and \(B\) are respectively \[ 4\times10^{14}\ \text{Hz} \] and \[ 6\times10^{14}\ \text{Hz}. \] If both are irradiated with light of frequency \[ 10^{15}\ \text{Hz}, \] what is the ratio of the kinetic energies of electrons emitted from \(A\) and \(B\)?

The type of radioactive decay that involves the emission of a positron is

The number of radial nodes possible for \(3p\)-orbital is \(x\) and the number of angular nodes possible for \(4d\)-orbital is \(y\). What is \(x:y\)?

The value of \(Q\) in the given digital circuit is

If the wavelength of the signal to be transmitted by an antenna is increased by \(2\) times, then the effective power radiated by the antenna

The kinetic energy of the released electron in photoelectric effect depends on

An inductor of inductance \[ 5\,\text{H} \] is carrying an electric current of \[ 4\,\text{mA}. \] Then the energy stored in the inductor is

The ratio of the turns per unit length in two inductors is \[ 2:1. \] Then the ratio of the impedances produced by the inductors is

A bulk magnetic material has volume \[ 2\,\text{m}^3 \] and its magnetization is found to be \[ 2\,\text{A m}^{-1}. \] Then the magnetic moment of the bulk material is

An electron has an angular momentum of \[ 90h\ \text{J s} \] while orbiting with a linear velocity of \[ \pi\times10^5\ \text{m s}^{-1}. \] Then the radius of the orbit is \[ \left( m_e=9\times10^{-31}\,\text{kg}, \quad h=6.6\times10^{-34}\,\text{J s} \right) \]

A light of energy flux \[ 9\ \text{W cm}^{-2} \] is incident for \(20\) minutes on a black surface of area \[ 100\ \text{cm}^2. \] Then the maximum average force exerted on the surface is \[ (c=3\times10^8\ \text{m s}^{-1}) \]

A charged particle is moving parallel to a uniform magnetic field. Then the force on the charged particle is