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

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 ____________.

The heats of atomisation of PH_3(g) and P₂H_4(g) are 954 kJ mol⁻¹ and 1485 kJ mol respectively. The P-P bond energy in kJ mol⁻¹ is ____________.

The below given molecular geometry corresponds to which of the following molecule?

Identify the INCORRECT statement.

Which of the following statements are FALSE about lanthanoids?

(I) They have lower heat of atomization than transition metals

(II) They are soft metals with silvery white colour and densities of about 7 g cm⁻³.

(III) They react with water to give the metal hydroxide and oxygen gas.

(IV) They form hydroxides, which are covalent and basic.

Which mineral among the following contains vanadium in it?

Which of the following is CORRECT about alkynes?

The designation of a subshell with n = 6 and l = 2 is ____________.