AB is an ionic solid. The ionic radii of A<sup>+</sup> and B<sup>-</sup> are respectively r<sub>c</sub> and r<sub>a</sub>. Lattice energy of AB is proportional to :
The rate constant of a first order reaction at 27Â°C is 10<sup>-3</sup> min<sup>-1</sup>. The temperature coefficient of this reaction is 2. What is the rate constant (in min<sup>-1</sup>) at 17Â°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 Kh of a salt of NaOH and a weak acid (HX) If the Ka of the acid is Ka=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
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: