AB is an ionic solid. The ionic radii of A⁺ and B^- are respectively r_c and r_a. Lattice energy of AB is proportional to :

The rate constant of a first order reaction at 27°C is 10^-3 min^-1. The temperature coefficient of this reaction is 2. What is the rate constant (in min^-1) at 17°C for this reaction ?

The number of sigma and pi (π) bonds present in benzene respectively are :

The number of pπ - dπ 'pi' bonds present in XeO₃and XeO₄molecules, respectively are

The hydrolysis constant K_h of a salt of NaOH and a weak acid (HX) If the K_a of the acid is K_a=2x10^-6

Which among the following element does not liberate H₂ gas on reaction with NaOH?

An organic compound X on treatment with pyridium dichromate in dichloromethane gives compound Y.Compound Y reacts with I₂ and alkali to form idoform.The compound X is

HCl+H₂O?H₃O⁺+Cl^-

A Conjugate base of HCl is Cl^-

B Conjugate base of H₃O⁺ is H₂O

C Conjugateacid base pair is HCl and H₃O⁺

D Conjugateacid base pair is Cl^- and H₂O

For the reversible reaction C₂H₄ + H₂ ⇔ C₂H₆ the equilibrium constant can be expressed in units of

The conjugate base of HSO₄^- ion is: