List of top Chemistry Questions asked in AP EAPCET

500 mL of 0.1M HCl is mixed with 500 mL of 0.02M HA (weak acid) solution. To this solution, 2 g of solid NaOH is added. What is the pH of the resultant solution? (Given} \( K_a \) of HA is \( 4 \times 10^{-10} \), molar mass of NaOH is 40 g/mol, log 2 = 0.3, log 4 = 0.6\bf{)
Among the following, which is the correct statement?
Which one of the following options is correct for \[ q = -ve, \, w = +ve \{ (where \(q\) and \(w\) are heat and work respectively)} \]
If the standard molar enthalpies of formation of \( C_2H_5OH(l)) \), \( CO_2(g) \), and \( H_2O(l) \) are -278, -394, and -286 kJ mol\(^{-1}\) respectively, the standard enthalpy of combustion of the reaction \[ C_2H_5OH(l) + 3O_2(g) \rightarrow 2CO_2(g) + 3H_2O(l) \] in kJ mol\(^{-1}\) is:

Match the following:

Match List I with List II:

Identify the correct statements from the following:
(I) According to Charles' law, at constant pressure, the volume of a gas is directly proportional to its temperature.
(II) The rate of diffusion of a certain mass of a gas is inversely proportional to its density, at constant pressure and temperature.
(III) The kinetic energy of a gas is directly proportional to T (K).
At 300 K, 1 g of an ideal gas (A) exerted a pressure of 2 atm in a closed container. When 2 g of another ideal gas (B) was introduced into this container at the same temperature, the pressure changed to 3 atm. The correct relationship between the molar mass of A (\(M_A\)) and B (\(M_B\)) is:
The number of antibonding electrons in \( N_2^+ \), \( O_2^+ \), \( O_2^- \) is respectively:
The total number of electrons in antibonding molecular orbitals of \( O_2 \) is:
The element with atomic number 118 will be:
Which of the following contains 10 electrons, 11 protons, and 12 neutrons?
The wave number of a photon is \( 10^4 \, cm^{-1} \). What is its energy in joules? Given: \[ h = 6.6 \times 10^{-34} \, Js, \quad c = 3 \times 10^{10} \, cm/s, \quad \tilde{\nu} = 10^4 \, cm^{-1} \]
Match the following: \[ \begin{array}{|c|c|} \hline \textbf{Molecule / Ion} & \textbf{Shape} \\ \hline \text{A. } \text{I}_3^- & 1. \text{T-shaped} \\ \text{B. } \text{ClF}_3 & 2. \text{See-Saw} \\ \text{C. } \text{H}_2\text{O} & 3. \text{Angular} \\ \text{D. } \text{SF}_4 & 4. \text{Linear} \\ \hline \end{array} \]
A photon of wavelength 3000 A strikes a metal surface. The work function of the metal is 2.13 eV. What is the kinetic energy of the emitted photoelectron?

In the below reaction, geometry of BCl3, X respectively are \(\text{BC}_{3} + \text{NH}_{3} \rightarrow X\)

Consider a gas phase reaction which occurs in a closed vessel. \[ 2A (g) \rightarrow 4B (c) + C (g) \] The concentration of B is found to be increased by \( 5 \times 10^{-3} \) mol L\(^{-1}\) in 10 seconds. The rate of disappearance of A (in mol L\(^{-1}\) s\(^{-1}\)) is

Identify X and Y in the following reaction $\text{CH}_{2} = \text{CH}_{2} \xrightarrow{\text{(i) X}} \text{CH}_{3}\text{CH}_{2}\text{I} \xrightarrow{\text{(ii) Y}}$

The product of an amine 'X' with benzene sulphonyl chloride produces the product which is insoluble in alkali. The product of 'X' with ethanoyl chloride is:
Fittig reaction is:
What is ‘X’ in the following reaction?
Kmno4/koh
Identify the correct products, when ethanol reacts with PCl$_5$
Which of the following represents nucleoside?
Identify the correct statement from the following:
How many asymmetric carbons are present in the following molecule? HOCH$_2$CH(Br)CH(Br)CH$_2$OH