List of top Chemistry Questions asked in AP EAPCET

At \(500\,\text{K}\), for the reaction, \[ N_2(g)+3H_2(g)\rightleftharpoons 2NH_3(g), \] the \(K_p\) is \(0.036\,\text{atm}^{-2}\). What is its \(K_c\) in \(L^2\text{mol}^{-2}\)? \((R=0.082\,L\,\text{atm mol}^{-1}\text{K}^{-1})\)

The relative basic strength of the compounds is correctly shown in the option

Calcium carbide \(+\,D_2O \rightarrow X + Ca(OD)_2\). The hybridization of carbon atom/s in \(X\)

The two main constituents of Portland cement are

Identify the correct statements from the following
\[ \text{(a) } BeSO_4 \text{ is soluble in water} \] \[ \text{(b) } BeO \text{ is an amphoteric oxide} \] \[ \text{(c) } CO \text{ can be obtained by heating } CaCO_3 \text{ at } 1070-1270\,K \]

Use the data from table to estimate the enthalpy of formation of \(CH_3CHO\).
\[ \begin{array}{|c|c|c|} \hline \text{Bond Enthalpy} & \text{Bond} & \text{Enthalpy of formation} \\ \hline 400\ \text{kJ mol}^{-1} & C-H & C(g)=700\ \text{kJ mol}^{-1} \\ \hline 350\ \text{kJ mol}^{-1} & C-C & H(g)=200\ \text{kJ mol}^{-1} \\ \hline 700\ \text{kJ mol}^{-1} & C=O & O(g)=250\ \text{kJ mol}^{-1} \\ \hline \end{array} \]

The set of species having only fractional bond order values is

\(50\,\text{g}\) of a substance is dissolved in \(1\,\text{kg}\) of water at \(+90^\circ\text{C}\). The temperature is reduced to \(+10^\circ\text{C}\). The density is increased from \(1.1\) to \(1.15\,\text{g cc}^{-1}\). What is the % change of molarity of the solution?

Identify the correct statements from the following
\[ \text{I. At }0\,K,\text{ the entropy of pure crystalline materials approaches zero.} \] \[ \text{II. Entropy for the process }H_2O(l)\longrightarrow H_2O(g)\text{ decreases.} \] III. Gibbs energy is a state function.

What are the oxidation numbers on S atoms in \(S_4O_6^{2-}\)?

Identify the correct variation of pressure and volume of a real gas (A) and an ideal gas (B) at constant temperature.
(\(y=P;\;x=V\))

In the Lewis dot structure of carbonate ion shown under, the formal charges on the oxygen atoms \(1,2\) and \(3\) are respectively:

An element \(X\) with atomic number \(13\) forms a complex of the type \([XCl(H_2O)_5]^{2+}\). The covalency and oxidation state of \(X\) in it are respectively

The energy required (in eV) to excite an electron of H-atom from the ground state to the third state is

In which of the following, oxides of three elements \(X\), \(Y\) and \(Z\) are correctly arranged in the increasing order of acidic nature. The electronic configurations of \(X\), \(Y\) and \(Z\) are \([\text{Ne}]3s^23p^1\), \([\text{Ne}]3s^23p^5\), \([\text{Ne}]3s^2\) respectively.

Identify the major product of the following reaction

Finkelstein reaction is used for the synthesis of

Pernicious anemia is caused due to deficiency of which vitamin?

Which of the following vitamins cannot be stored in the body?

Which among the following will have highest density?

An aryl carboxylic acid on treatment with sodium hydrogen carbonate liberates a gaseous molecule. Identify the gas molecule liberated.

Identify the major product \((Y)\) from the following reaction

In the reaction of phosphorus with conc. \(HNO_3\), the oxidized and reduced products respectively are

Which of the following is formed when \(SO_3\) is absorbed by concentrated \(H_2SO_4\)?