List of top Questions asked in AP EAPCET- 2025

If the differences between the specific heat capacities at constant pressure and constant volume of hydrogen and another gas are in the ratio 16 : 1, then the other gas is:
If four moles of hydrogen and two moles of helium form a gaseous mixture, then the molar specific heat capacity of the mixture at constant pressure is
If two temperatures on Celsius scale differ by \( 25^\circ \), then the difference of those two temperatures on Fahrenheit scale is
During adiabatic expansion process, if the temperature of 4 moles of a monoatomic gas is decreased by \(100^\circ C\), then the work done by the gas is
(Universal gas constant \(R = 8.3 \, \text{J/mol·K}\))
If the values of the temperature of a body in Fahrenheit and Celsius scales are in the ratio of 13 : 5, then the temperature of the body is
If the ratio of specific heats of a gas at constant pressure and at constant volume is $\gamma$, then the number of degrees of freedom of the rigid molecules of the gas is
When 80 J of heat is supplied to a gas at constant pressure, if the work done by the gas is 20 J, then the ratio of the specific heat capacities of the gas is
The ratio of the efficiencies of two Carnot engines A and B is 1.25 and the temperature difference between the source and the sink is the same in both engines. The ratio of the absolute temperatures of the sources of the engines A and B is
If a gas of volume $400~\text{cc$ at an initial pressure $P$ is suddenly compressed to $100~\text{cc}$, then its final pressure is (The ratio of specific heats $\gamma = 1.5$)}
A Carnot engine A working between temperatures 600 K and T (T \(<\) 600 K) and another Carnot engine B working between temperatures T (T \(>\) 400 K) and 400 K are connected in series. If the work done by both the engines is same, then T =
When an ideal diatomic gas is heated at constant pressure, the fraction of the heat utilised to increase the internal energy of the gas is
If a gaseous mixture consists of 3 moles of oxygen and 4 moles of argon at an absolute temperature \( T \), then the total internal energy of the mixture is
(Neglect vibrational modes and \( R \) is the universal gas constant)

Match the following:

List-I (reaction)List-II (catalyst)
A) SO2(g) + Cl2(g) → SO2Cl2(l)I) Pt / Rh gauge
B) 2SO2(g) + O2(g) → 2SO3(g)IV) V2O5
C) 4HCl + O2 → 2Cl2 + 2H2OII) CuCl2
D) 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)III) Charcoal
The number of d-electrons in Fe2+ (Z = 26) is not equal to:
The water soluble vitamin which is not excreted through urine easily is

The correct statement regarding the mechanism involved in the above reactions is

If a bullet of mass 2 g travels with velocity of 3 × 103 cm s-1, its wavelength (in m) is: (h = 6.6 × 10-34 Js)
Identify the reaction which occurs in blast furnace at temperature of above 900 K.
Consider the following
Statement-I: Natural rubber becomes soft at low temperature and brittle at high temperature.
Statement-II: Natural rubber has weak van der Waals forces between its polymer chains.
A halide with formula C6H13Br gave two isomeric alkenes A and B on dehydrobromination. On ozonolysis of mixture of A and B the following compounds were obtained: CH3COCH3, CH3CHO, CH3CH2CHO and (CH3)2CHCHO. The halide is:
For the reaction X(g) $\rightarrow$ Y(g) at equilibrium, the partial pressure of Y is one-third that of X. What is the standard Gibbs energy change ($\Delta G^\circ$) for this reaction?
The electron gain enthalpy (Cl2,H) of chlorine is -3.7 eV mol-1. How much energy (in kcal mol-1) is released when 71 g of chlorine atoms are completely converted into Cl- ions in gaseous state? (1 eV = 23 kcal)
The BOD value of clean water is X. The maximum concentration of cadmium recommended in drinking water is Y. X and Y respectively are
Two 1 L flasks at T(K) contain O2 and helium with rms velocities of x m s-1 and y m s-1, respectively. What is the relationship between x and y?
Which option has the greatest mass?