List of top Chemistry Questions asked in AP EAMCET

In which of the following Galvanic cells, emf is maximum? (Given: \( E^\circ_{\text{Mg}} = -2.36 \, V \) and \( E^\circ_{\text{Cl}_2/\text{Cl}^-} = +1.36 \, V \))

Zinc oxide (white) is heated to high temperature for some time. Observe the following statement regarding above process:
I. Zinc oxide colour changes to pale yellow
II. The type of defect formed is ‘metal deficiency’
III. Some \( Zn^{2+} \) and \( e^- \) are present in interstitial places

In the given structure of Diborane, \( \theta_1, \theta_2 \) are respectively:

At equilibrium for the reaction \[ A_2 (g) + B_2 (g) \rightleftharpoons 2AB (g) \] The concentrations of \( A_2 \), \( B_2 \), and \( AB \) respectively are \( 1.5 \times 10^{-3}M \), \( 2.1 \times 10^{-3}M \), and \( 1.4 \times 10^{-3}M \). What will be \( K_p \) for the decomposition of AB at the same temperature?

A, B, C and D are some compounds. The enthalpy of formation of A(g), B(g), C(g) and D(g) is 9.7, -110, 81 and -393 kJ mol\(^{-1}\) respectively. What is \( \Delta H \) (in kJ mol\(^{-1}\)) for the given reaction? \[ A(g) + 3B(g) \rightarrow C(g) + 3D(g) \]

A, B, C, and D are some compounds. The enthalpy of formation of A(g), B(g), C(g), and D(g) is 9.7, -110, 81, and -393 kJ mol\(^{-1}\) respectively. What is \( \Delta H \) (in kJ mol\(^{-1}\)) for the reaction: \[ A(g) + 3B(g) \rightarrow C(g) + 3D(g) \]

The de Broglie wavelength of an electron with kinetic energy of \( 2.5 \) eV is (in m): \[ (1 \text{ eV} = 1.6 \times 10^{-19} \text{ J}, \quad m_e = 9 \times 10^{-31} \text{ kg}) \]

Two statements are given below:
Statement I: Nitrogen has more ionization enthalpy and electronegativity than beryllium.
Statement II:\( CrO_3 \), \( B_2O_3 \) are acidic oxides.
Correct answer is:

The ratio of ground state energy of \( \text{Li}^{2+}, \text{He}^{+}, \text{H} \) is:

At \( T(K) \) for one mole of an ideal gas, the graph of \( P \) (on y-axis) and \( V^{-1} \) (on x-axis) gave a straight line with slope of \( 32.8 \) L atm mol\(^{-1} \). What is the temperature (in K)? \((R = 0.0821 \text{ L atm mol}^{-1} \text{ K}^{-1})\)

At 290 K, a vessel (I) contains equal moles of three liquids (A, B, C). The boiling points of A, B, and C are 348 K, 378 K, and 368 K respectively. Vessel (I) is heated to 300 K and vapors were collected into vessel (II). Identify the correct statements. (Assume vessel (I) contains liquids and vapors and vessel (II) contains only vapors.)
Statements:
I.Vessel – I is rich in liquid
II.Vessel – II is rich in vapors of C.
III. The vapor pressures of A, B, and C in Vessel (I) at 300 K follows the order \( C>A>B \).