List of top Chemistry Questions asked in AP EAMCET

At $T$ K, the equilibrium constant for the reaction \[ {H}_2(g) + {Br}_2(g) \rightleftharpoons 2 {HBr}(g) \] is 1.6 $\times$ 10$^{1}$. If 10 bar of HBr is introduced into a sealed vessel at $T$ K, the equilibrium pressure of HBr (in bar) is approximately:

The molar heats of fusion and vaporization of benzene are 10.9 and 31.0 kJ mol$^{-1}$ respectively. The changes in entropy for the solid $\rightarrow$ liquid and liquid $\rightarrow$ vapor transitions for benzene are $x$ and $y$ J K$^{-1}$ mol$^{-1}$ respectively. The value of $y(x)$ in J$^2$ K$^{-2}$ mol$^{-2}$ is:

The volume of an ideal gas contracts from 10.0 L to 2.0 L under an applied pressure of 2.0 atm. During contraction, the system also evolved 90 J of heat. The change in internal energy (in J) involved in the system is (1 L·atm = 101.3 J):

At STP $x$ g of a metal hydrogen carbonate (MHCO$_3$) (molar mass $84 \, {g/mol}$) on heating gives CO$_2$, which can completely react with $0.02 \, {moles}$ of MOH (molar mass $40 \, {g/mol}$) to give MHCO$_3$. The value of $x$ is:

What is the kinetic energy (in $ {J/mol} $) of one mole of an ideal gas (molar mass = $0.01 \, {kg/mol}$) if its rms velocity is $4 \times 10^2 \, {m/s}$?

What is the ratio of kinetic energies of $3 \, {g}$ of hydrogen and $4 \, {g}$ of oxygen at a certain temperature?

Among the following species, the correct set of isomolecular pairs are: \[ \mathrm{XeO}_3, \, \mathrm{CO}_3^{2-}, \, \mathrm{SO}_3, \, \mathrm{H}_3\mathrm{O}^+, \, \mathrm{ClF}_3 \]

Observe the following reactions. Identify the reaction in which the hybridisation of the underlined atom is changed:

Match the following elements with their correct classifications:

The graph shown below represents the variation of probability density, $ \Psi(r) $, with distance $ r $ of the electron from the nucleus. This represents:

If uncertainty in position and momentum of an electron are equal, then uncertainty in its velocity is:

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

Identify the amino acid which has:

The correct sequence of reactions involved in the following conversion is:

Match the following:

Given below are two statements:
Statement I: Viscosity of liquid decreases with an increase in temperature.
Statement II: The units of viscosity are kg m^-1 s^-2.

A hydrocarbon containing C and H has 92.3% C. When 39 g of hydrocarbon was completely burnt in O_2, x moles of water and y moles of CO₂were formed. x moles of water is sufficient to liberate 0.75 moles of H₂ with Na metal. What is the weight (in g) of oxygen consumed?

At 300 K, for the reaction A → P, the ∆Ssys is 5 J K^-1 mo^l-1. What is the heat absorbed (in kJ mol^-1) by the system?

At temperature $ T $ (K), the equilibrium constant $ K_c $ for the reaction: \[ A_2(g) \rightleftharpoons B_2(g) \] is 99.0. Two moles of $ A_2(g) $ were heated in a 1L closed flask to reach equilibrium. What are the equilibrium concentrations (in $ mol \ L^{-1} $) of $ A_2(g) $ and $ B_2(g) $?

At $ 27^\circ C $, the degree of dissociation of weak acid (HA) in its 0.5M aqueous solution is 1%. Its $ K_a $ value is approximately:

Lithium forms an alloy with ‘X’. This alloy is used to make armor plates. What is ‘X’?