List of top Chemistry Questions asked in AP EAMCET

The molecular formula of a crystalline solid is X$ _3 $Y$ _2 $. Atoms of Y form ccp lattice, and atoms of X occupy 50% octahedral voids and x% of tetrahedral voids. What is the percentage of unoccupied tetrahedral voids?

In which of the following metals extraction, impurities are removed as slag?

Toluene on reaction with the reagent X gave Y, which dissolves in NaHCO$ _3 $ and when reacted with Br$ _2 $/Fe gave Z. What are X and Z?

At 240.55 K, for one mole of an ideal gas, a graph of $ P $ (on y-axis) and $ V^{-1} $ (on x-axis) gave a straight line passing through the origin. Its slope (m) is 2000 J mol$^{-1}$. What is the kinetic energy (in J mol$^{-1}$) of the ideal gas?

What are X and Y respectively in the following reaction sequence?

0.1 mole of H$_3$PO$_3$ is present in 500 mL of solution. The normality of it is:

In the extraction of iron, the reaction which occurs at 900-1500 K in blast furnace is

A solid is dissolved in 1 L water. The enthalpy of its solution ($\Delta H_{{sol}}^\circ$) is 'x' kJ/mol. The hydration enthalpy ($\Delta H_{{hyd}}^\circ$) for the same reaction is 'y' kJ/mol. What is lattice enthalpy ($\Delta H_{{lattice}}^\circ$) of the solid in kJ/mol?

60 cm$^3$ of SO$_2$ gas diffused through a porous membrane in $ x $ minutes. Under similar conditions, 360 cm$^3$ of another gas (molar mass 4 g mol$^{-1}$) diffused in $ y $ minutes. The ratio of $ x $ and $ y $ is:

Given below are two statements
Statement - I: For isothermal irreversible change of an ideal gas, \[ q = -w = P_{\text{ext}}(V_{\text{final}} - V_{\text{initial}}) \] Statement - II: For adiabatic change, \[ \Delta U = W_{\text{adiabatic}} \] The correct answer is:

The critical temperature of A, B, C, D gases are 190 K, 630 K, 261 K, 400 K respectively. The quantity of gas adsorbed per gram of charcoal at same pressure is least for the gas

At 300 K, the vapour pressures of A and B liquids are 500 and 400 mm Hg respectively. Equal moles of A and B are mixed to form an ideal solution. The mole fraction of A and B in vapor state is respectively.

A compound is formed by atoms of A, B and C. Atoms of C form hcp lattice. Atoms of A occupy 50% of octahedral voids and atoms of B occupy $\frac{2}{3}$ of tetrahedral voids. What is the molecular formula of the solid?

Consider the reaction: $C_2H_5Cl(g) \rightarrow 2C(g) + 5H(g) + Cl(g)$, where $\Delta H = 3047 \, {kJ mol}^{-1}$. The bond dissociation enthalpy ($\Delta_{{bond}} H$) values of C–Cl and C=C bonds are 431 and 414 kJ mol$^{-1}$, respectively. What is the average bond enthalpy of C–H in kJ mol$^{-1}$?

If the first ionisation enthalpy of Li, Be and C respectively are 520, 899, 1086 kJ/mol, the first ionisation enthalpy (in kJ/mol) of B will be

Consider the following statements:
Statement I: The entropy of pure crystalline solid approaches zero as the temperature approaches absolute zero value.
Statement II: For a reaction at equilibrium, $\Delta G$ is zero.

Which of the following reactions is not a metal displacement reaction?

At $ T(K) $, in a closed vessel, a gas obeying the kinetic theory of gases has two molecules. The kinetic energy of these molecules is $ x_1 $ J and $ x_2 $ J respectively. After a few collisions, their kinetic energy is $ y_1 $ J and $ y_2 $ J respectively. Identify the correct relationship/s:

(1) $ x_1 = y_1 $

(2) $ \frac{x_1 + x_2}{2} = \frac{y_1 + y_2}{2} $

(3) $ x_2 = y_2 $

(4) $ (x_1 - x_2)^2 = (y_1 - y_2)^2 $

The square of the average speed of the argon gas at 27 $^\circ$C is (in m$^2$s$^{-2}$?):
($ R = 8.314 \, {J K}^{-1}{mol}^{-1} $, Atomic weight of Ar = 40 u)

Identify the sets of species having the same bond order:
(i) $ {F}_2, {O}_2^{2-} $
(ii) CO, NO$^{+}$
(iii) $N_2$, $O_2$
(iv) $H_2$, $B_2$
The correct option is:

Given below are two statements:
Statement I: Diamagnetic $li_2$ molecules are known to exist in the vapour phase.
Statement II: According to MO theory, double bond in $C_2$ consists of both $ \pi $ bonds. The correct option is:

The atomic radius in pm of Mg, P, Si, Al respectively is:

A light of frequency $ x $ Hz when falls on a metal plate emits electrons that have double the kinetic energy compared to when light of frequency $ y $ Hz falls on the same plate. The threshold frequency of the metal in Hz is:

A spectral line in the hydrogen spectrum is due to an electron transition between energy levels whose sum and difference are respectively 5 and 3. The wavelength of it (in cm) is:

The number of $\sigma$ bonds, $\pi$-bonds, and lone pairs of electrons present in the product Z in the given reaction sequence are respectively: