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

For the following reaction:

\[\ce{Fe2O3_{(s)} + 3CO_{(g)} -> 2Fe_{(s)} + 3CO2_{(g)}}\]; ΔH⁰ = −29.8 kJ and ΔS⁰ = 15 J K⁻¹. What is the value of \[\ce{ΔS_{(total)}}\] at 298 K?

Heat of combustion of C_(s), H_2(g) and C₂H_6(g) are −x₁, −x₂ and −x₃ respectively. Hence heat of formation of C₂H_6(g) is ____________.

Which of the following conditions indicates the reaction is spontaneous?

Equilibrium constant for a reaction is 20. What is the value of ∆G⁰ at 300 K? (R = 8 × 10⁻³ kJ)

At what temperature, a chemical reaction will have the following values of ∆G, ∆S and ∆H?

∆G = −5.2 KJ mol⁻¹, ∆H = 145.6 kJ mol⁻¹, ∆S = −216 kJ mol⁻¹

What is the value of effective magnetic moment found in +3 oxidation state of Chromium (Z = 24)?

For a reaction to be non-spontaneous at all temperatures, values of ΔH and ΔS respectively are ____________.

The observed electronic configuration of promethium (atomic number 61) is ____________.

In haloalkanes and haloarenes, halogen atom is bonded to ____________ hybridized carbon atom of an alkyl and aryl groups, respectively.

In oxy-acetylene flame for welding and cutting of metals, a mixture of ____________ is used.

What type of hybridization results in tetrahedral geometry?

Which element from following forms colourless compounds in +2 oxidation state?

Identify the correct decreasing order of ionic radii of lanthanoids.

Which of the following properties is NOT of lanthanoids?

Identify the formula of lanthanoid oxide formed when lanthanoid (Ln) is burnt in oxygen.

If ΔH° and ΔS° for the reaction \[\ce{N2O_{4(g)} -> 2NO_{2(g)}}\] is 57.24 kJ and 175.8 JK^-1 mol^-1 respectively. What is the value of ΔG° for this reaction at 298 K?

Which of following is residual entropy of a substance?

Standard molar entropy is ______.

Calculate the amount of heat liberated during formation of 2. 7 kg of water if heat of formation of water is - 284.5 kJ mol^-1.

The H-H bond energy is 430 kJ mol^-1 and Cl-Cl bond energy is 240 kJ mol^-1. Δ_fH for HCl is - 90 kJ, then H-Cl bond energy is ______.