List of top Questions asked in AP EAPCET

0.5g of non-volatile solute is added to 39g of Benzene. Then vapor pressure of solution is (vapor pressure of pure Benzene is 0.850 torr)
At 298 K, $ K_{\text{sp}} $ of Cu(OH)₂ is $ 2.2 \times 10^{-20} $. What is its solubility in $ 10^{-7} \, \text{M} \, \text{CuCl}_2 $ solution?
The electrophile involved in sulphonation of benzene is
Which one of the following is not correct regarding diamond?
When burnt in air the metal 'X' forms only oxide, where as metal 'Y' forms oxide and nitride. X, Y respectively are
Among the following, the method used for removal of temporary hardness of water is
Identify correctly matched pairs
I. Boron fibres - bullet proof vest
II. Metal borides - nuclear industry
III. Borax - flux in soldering
One mole of aqueous $ \text{SO}_3^{2-} $ is completely reacted with 2 moles of $ \text{Br}_2 (l) $. What is the oxidation state (s) of S in the product formed?
At T (K), a closed vessel containing 2 g of an ideal gas (A) (molar mass = $ M_A $) exerted a pressure of 1 atm. When 16 g of another ideal gas (B) (molar mass = $ M_B $) was introduced into this vessel, the pressure increased to 2 atm. What is the correct relationship between $ M_A $ and $ M_B $?
Which of the following reactions are endothermic and spontaneous?
A flask with open mouth containing air was heated from 27°C to 477°C. Some air was expelled. What is the fraction of air expelled out?
If the standard enthalpy change and entropy change of a reaction at 298 K are 11.1 kJ mol$^{-1}$ and 42 J K$^{-1}$ mol$^{-1}$, which one of the following options is correct?
1 L of 0.1 M HCl is added to 1 L of 0.1 M HA (weak acid) solution. To this solution, 16 g of solid NaOH is added. What is the pOH value of resultant solution? (Given molar mass of NaOH is 40 g/mol, $ \log 2 = 0.3, \log 4 = 0.6 $)
The atomic mass of H and C is 1 and 12 u respectively. What is the ratio of weight of one atom each of H and C?
The attenuation of a signal is compensated by
Chemistry of lanthanides ($ \text{Ln} $) is dominated by +3 oxidation state. Which of the following is incorrect?
Which of the following species has an unpaired electron?
Which of the following molecules is not linear?
If $ n $ is the principal quantum number, as per quantum mechanical model of atom, the maximum number of electrons possible in any energy level is limited to
A radioactive element A with half life 3 hours decays to a stable element B. After a time $ t $, the ratio of A and B atoms is 1:16 then the time $ t $ in hours is
When the voltage applied across a reverse biased p-n junction diode is increased, then the diffusion current
If L is the inductance and C is the capacitance, then the frequency of a transistor oscillator is directly proportional to
If the electric field of an electromagnetic wave is increased by 100%, then the energy density of the wave increases by
The time period of revolution of an electron in an orbit of principal quantum number $ n $ is $ T $. If the relation between time period and principal quantum number is $ T \propto n^3 $, then $ x = $
An electron, a proton and an alpha particle are moving with same kinetic energy. If $ \lambda_1, \lambda_2, \lambda_3 $ are the de Broglie wavelengths of the electron, proton and alpha particle respectively, then