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

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

What will be the volume of oxygen gas produced, if the reaction \[\ce{2KClO_{3(s)} -> 2KCl_{(s)} + 3O_{2(g)}}\]; ΔH° = - 78 kJ is carried out at S.T.P.?

How many moles of methane are present in 11.2 Lat S.T.P.?

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 ______.

The equilibrium constant for a reaction is 10, value of ΔG° at 300 K is (R = 8 × 10^-3 kJ)

Identify the compound that gives 2, 5-dimethylhexane by reacting with sodium metal in presence of dry ether.

Identify the product of the following reaction.

\[\ce{CH3 - Br + C2H5COOAg ->[\Delta] ?}\]

For a reaction ΔH = - 30kJ and ΔS = - 45 JK^-1, at what temperature reaction changes from spontaneous to non-spontaneous?