List of top Questions asked in AP EAPCET

Identify the correct statement

Work function of Cu metal is 4.8 eV. What is the approximate wavelength of incident radiation required to eject electrons from its surface? ($h = 6.626 \times 10^{-34}$ Js)

Match the following:

Property	Expression
A. π	I. K_b · m
B. ΔT_f	II. K_f · m
C. ΔT_b	III. CST
D. (P⁰ - P) / P⁰	IV. (n₁ / (n₁ + n₂))

The correct order of the metallic nature of the following elements is

If the standard enthalpy change ($\Delta H^o$) for a certain reaction at 298 K and constant pressure is -1860 kJ mol$^{-1}$, the standard entropy change ($\Delta S^o$) of the same reaction is -550 J K$^{-1}$ mol$^{-1}$, which of the following statements is correct?

The number of products obtained in the following reaction is: Reaction:

Among the following, the correct statements are
I. CCl$_4$ is an electron-precise molecule
II. SnF$_4$, PbF$_4$ are ionic in nature
III. All tetrahalides of group 14 elements are easily hydrolyzed
IV. PbO, PbO$_2$ are amphoteric in nature

At T (K), a gaseous mixture containing H₂, He and O$_$2 exerted a pressure of 1 bar. The weight percentage of H$_$2 and He is 20 and 16 respectively. The partial pressure (in bar) of H$_$2, He and O$_$2 is respectively

What is ‘X’ in the following reaction?

The number of moles of OH$^-$ ions present in 100 mL of 0.2 M Al(OH)$_3$ solution is (assume 100% dissociation)

Which of the following alkyl halides is most reactive towards substitution by $ S_N1 $ mechanism?

Identify the region of spectral lines of electromagnetic spectrum, when electron transition takes place from higher energy levels to n = 3, 4, 5 in atomic spectrum of hydrogen.

The IUPAC name of the following molecule is

1-Chloro-4-nitrobenzene, 1-Chloro-2,4-dinitrobenzene and 1-Chloro-2,4,6-trinitrobenzene are transformed to corresponding phenols with the reagents X, Y, Z respectively. What are X, Y, Z?

X and Y in the following reactions are:

What are ‘X’ and ‘Y’ respectively in the following reactions?

Among the following, which statement is not correct?

Which of the following species has an unpaired electron?

The angular momentum of electron in H atom in a particular n state is $\frac{h}{\pi}$. What is the energy in J required to excite the electron from this particular n state to (n+1) state?

At 300 K, 1 g of an ideal gas (A) exerted a pressure of 2 atm in a closed container. When 2 g of another ideal gas (B) was introduced into this container at the same temperature, the pressure changed to 3 atm. The correct relationship between the molar mass of A ($M_A$) and B ($M_B$) is:

If 100 L of an ideal gas at a pressure of 2 atm is compressed isothermally and reversibly to a final volume of ‘X’ L releases -460.6 L atm heat, the final volume ‘X’ (in L) is

When $10^{-3} \, M$ solution of glucose in water freezes at -0.0186°C, then at what temperature $10^{-3} \, M$ solution of NaCl will freeze?

The molar conductivity of 0.027 M methanoic acid is 40.42 S cm2 mol–1. The value of dissociation constant of this acid is (Given: $\lambda^0_{H^+} = 349.6~\text{S cm}^2 \text{mol}^{-1},~\lambda^0_{HCOO^-} = 54.6~\text{S cm}^2 \text{mol}^{-1}$)

The correct order of covalent radii of Si, Ge, Sn is:

The molarity of the solution when 4.9 g of H$_2$SO$_4$ is dissolved in 250 mL of solution is