List of top Questions asked in AP EAPCET

At T(K), the vapour pressure of an aqueous solution of a non-volatile solute,
whose mole fraction is 0.02 is found to be 34.65 mm Hg.
What is the vapour pressure (in mm Hg) of pure water at the same temperature?

In an aqueous glucose solution, the mole fraction of water is 40 times the mole fraction of glucose. What is the weight percentage (w/w) of glucose in the solution?

Benzoic acid molecules undergo dimerisation in benzene. 2.44 g of benzoic acid when dissolved in 30 g of benzene caused depression in freezing point of 2 K. What is the percentage of association of it ? (Given $K_f (C_6H_6) = 5\operatorname{K kg mol^{-1}}$; molar mass of benzoic acid $= 122\operatorname{g mol^{-1}}$)

Two acids A and B are titrated separately. 25 mL of 0.5 M Na$_2$CO$_3$ solution requires 10 mL of A and 40 mL of B for complete neutralisation. The volume (in L) of A and B required to produce 1 L of 1 N acid solution respectively are

Which of the following oxides is amphoteric in nature?

How many grams of calcium carbonate ($\mathrm{CaCO}_3$) are required to completely neutralize 200 mL of 0.5 M HCl? Given the reaction: $$ \mathrm{CaCO}_3 + 2 \mathrm{HCl} \rightarrow \mathrm{CaCl}_2 + \mathrm{H}_2 \mathrm{O} + \mathrm{CO}_2 $$ (Molar mass of $\mathrm{CaCO}_3 = 100 \, \text{g/mol}$)

Consider the following: Statement I: CCl₄ does not undergo hydrolysis. But SiCl₄ undergoes hydrolysis.
Statement II: Thermal and chemical stability of GeX₄ is more than GeX₂.

What is the number of moles in 88 grams of carbon dioxide (CO₂)?

How many atoms are present in 1 mole of oxygen gas (O₂)?

How many moles of $\mathrm{CO_2}$ are produced when 4 moles of $\mathrm{C_2H_6}$ (ethane) combust completely?
Given reaction: \[ 2 \mathrm{C_2H_6} + 7 \mathrm{O_2} \rightarrow 4 \mathrm{CO_2} + 6 \mathrm{H_2O} \]

Consider the following reaction A(g) + 3B(g) $ \longrightarrow $ 2C(g); $ \Delta H^\ominus = -24 $ kJ. At $25 \, ^\circ\text{C}$ if $ \Delta G^\ominus $ of the reaction is -9 kJ, the standard entropy change (in JK$^{-1}$) of the same reaction at same temperature is

For which reaction $ \Delta H \neq \Delta U $?

The number of extensive and intensive properties in the list given below is respectively: % List - Density, enthalpy, mass, temperature, volume, pressure

1 mole of an ideal gas is allowed to expand isothermally and reversibly from 1L to 5L at 300 K. The change in enthalpy (in kJ) is
(R = 8.3 J K$^{-1}$ mol$^{-1}$)

For a first-order reaction, the rate constant $ k $ is $ 1.386 \times 10^{-3} \, \text{s}^{-1} $. What is the half-life $ t_{1/2} $ of the reaction? (Use $ \ln 2 = 0.693 $)

The rate constant for a first-order reaction is $ 0.0693 \, \text{min}^{-1} $. What is the half-life of the reaction?

A → P is a first order reaction. At T(K), the concentration of reactant (A) after 10 min of the reaction is $x$ mol L$^{-1}$. After 20 min, the concentration of A is $y$ mol L$^{-1}$. What is its rate constant (in min$^{-1}$)?

A → P is a first order reaction. The reaction was started at 10.00 AM. At 10.10 AM, the concentration of A was x mol L^-1. At 10.20 AM, the concentration of A was y mol L^-1. The half life (in min) of the reaction is equal to:

The decomposition of AB$_3$(g) is a zero order reaction. At 300 K, the rate constant of the reaction is $2.5 \times 10^{-4}$ mol L$^{-1}$ s$^{-1}$. What is the rate of reaction (in mol L$^{-1}$ s$^{-1}$) when the concentration of AB$_3$(g) is taken as 10$^{-1}$ mol L$^{-1}$ at 300 K?

The time required for 100% completion of a zero order reaction is
[$R$]$_0$ = Initial concentration of reactant, R

At T(K), the following equation is obtained for a first order reaction.
\[ \log \frac{k}{A} = -\frac{x}{T} \] The activation energy for this reaction is equal to (R = gas constant)

$R \to P$ is a first-order reaction. The concentration of R changed from 0.04 to 0.03 mol L$^{-1}$ in 40 minutes. What is the average velocity of the reaction in mol L$^{-1}$ s$^{-1}$?

The following equation is obtained for a first order reaction at 300 K.
$\log_{10} \frac{k}{A} = 0.00174$ What is the activation energy (in J mol$^{-1}$) of the reaction ?
(R = 8.314 J mol$^{-1}$ K$^{-1}$)

For a first-order reaction, the ratio between the time taken to complete $\frac{3}{4}$th of the reaction and time taken to complete half of the reaction is

At 700 K, the equilibrium constant $K_e$ for the reaction $ \text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g) $ is 0.2 mol L$^{-2}$. What is the value of $K$ for the reverse reaction?