MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Chemistry

Identify the invalid equation.

For which among the following equimolar aqueous solutions Van't Hoff factor has the lowest value?

\[\ce{A -> B}\], ∆H = −10 kJ mol⁻¹, E_a(f) = 50 kJ mol⁻¹, then E_a of \[\ce{B -> A}\] will be ______.

What is the amount of water formed by the combustion of 1.6 g methane?

Identify the element that forms amphoteric oxide.

What is the energy associated with first orbit of Li²⁺ (R_H = 2.18 × 10^-18)?

In hydrogen atom, transition from the state n = 6 to n = 1 results in ultraviolet radiation. Infrared radiation will be obtained in the transition ______.

How many moles of helium gas occupies 22.4 Lat 0°c and at 1 atmospheric pressure?

When the enthalpy of combustion of carbon to carbon dioxide is - 360 kJ mol^-1, then the enthalpy change for the formation of 18 g of CO₂ from carbon and dioxygen at the same temperature in kJ will be ______.

The ratio between the root mean square velocity of H₂ at 50 K and that of O₂ at 800 K is ______.

What is enthalpy of formation of NH₃ if bond enthalpies as (N ≡ N) = - 941 kJ/mol.

\[\ce{(H - H)}\] = 436 kJ/mol and \[\ce{(N - H)}\] = 389 kJ/mol?

The enthalpy change that accompanies a reaction in which 1 mole of its standard state is formed from its elements in their standard states

What is the energy of an electron in stationary state corresponding to n = 2?

What will be the formula of an oxide of iodine (atomic mass = 127) which contains 25.4 g of iodine and 8g of oxygen?

When 0.5 gram of sulphur is burnt to form SO₂, 4.6 kJ of heat liberated. Calculate enthalpy of formation of SO₂(g). (Atomic mass : S = 32, O = 16)

Which of the following element belongs to the actinoid series?

The principal quantum number (n) and magnetic quantum number (m_l) for the valence electrons of rubidium atom (Z = 37) are ____________ respectively.

Equilibrium constant for a reaction is 20. What is the value of ΔG° at 300 K? (R = 8 x 10^-3 kJ)

One mole of NaCl_(s) on melting absorbed 30.5 kJ of heat and its entropy increased by 28.8 J K⁻¹. The melting point of NaCl is ____________.

A system is changed from an initial state to a final state by a manner such that ∆H = Q. If the change from initial state to final state was made by a different path, then ____________.