CSIR NET 2023 Weekend Booster Quiz | Chemical Science (3 December 2023)

The standard cell potential of cell, Pt|H₂(g)|HBr(aq)|AgBr(s) |Ag(s), was measured over a range of temperatures, and the data was fitted as E⁰(Volt)=0.01-1×10^-4(T-298)-2x 10^-6(T-298)²

The standard reaction entropy (JK^-1mol^-1) and enthalpy (kJ mol^-1) at 298 K are

Correct order of electron rich benzene ring is:

Using the Lindemann theory of unimolecular reaction, calculate the rate of reaction when the reactant approaches to 1M to form 10 M. Given: k₁ = k₃ = 10^-1, k₂ = 10^-2.

The correct order of the pK_a of the following compounds is

The calculated heat of formation  for NaCl₂ and CaF is

From each pair given below identify the ion which is larger in size

[CO²⁺, CO³⁺] [Fe²⁺, Zn²⁺] [Na⁺, F^–] [O^2–, S^2–]

Based on VSEPR theory, the structures of SbPh₅ and PPh₅ respectively are

Amongst the following, the compound which has the lowest energy barrier for the cis-trans isomerisation is:

What will be the rate of given reaction: A → P

Mechanism is:

Deactivation Process:

Deactivation:

Activation process:

The correct order of pKa values for the compounds X, Y and Z is