List of practice Questions

The standard Gibbs energy (\( \Delta G^{\circ} \)) for the following reaction is \[ A(s) + B^{2+}(aq) \rightleftharpoons A^{2+}(aq) + B(s), \quad K_c = 10^{12} \, {at} \] (Kc = equilibrium constant)
Which of the following relation is not correct?
The bond dissociation energy of X\(_2\), Y\(_2\) and XY are in the ratio of 1 : 0.5 : 1. \(\Delta H\) for the formation of XY is -200 kJ/mol. The bond dissociation energy of X\(_2\) will be

What would be the amount of heat absorbed in the cyclic process shown below? 
 

sp\(^3\) d\(^2\) hybridisation is not displayed by:
Identify the species having one \(\pi\)-bond and maximum number of canonical forms from the following:
Which one of the following compounds is having maximum 'lone pair-lone pair' electron repulsions?
The spin only magnetic moment of Fe\(^{3+}\) ion (in BM) is approximately.

In the following species, how many species have the same magnetic moment? 
(i) Cr\(^{2+}\) 
(ii) Mn\(^{3+}\) 
(iii) Ni\(^{2+}\) 
(iv) Sc\(^{2+}\) 
(v) Zn\(^{2+}\) 
(vi) V\(^{3+}\) 
(vii) Ti\(^{4+}\) 
 

The hybridisation scheme for the central atom includes a d-orbital contribution in
Intramolecular hydrogen bonding is found in
The ionic radii in (\({Å}\)) of \({N}^{3-}\), \({O}^{2-}\) and \({F}^-\) are respectively.
Electron affinity is positive when:
A stream of electrons from a heated filament was passed between two charged plates at a potential difference \( V \) volt. If \( e \) and \( m \) are the charge and mass of an electron, then the value of \( \frac{h}{\lambda} \) is:
A photon of wavelength \( 3000 \) Å strikes a metal surface. The work function of the metal is \( 2.13 \) eV. What is the kinetic energy of the emitted photoelectron? (\( h = 6.626 \times 10^{-34} \) Js)
The energy of the second orbit of a hydrogen atom is \( -5.45 \times 10^{-19} \) J. What is the energy of the first orbit of \( Li^{2+} \) ion (in J)?
If the de-Broglie wavelength of a particle of mass (\( m \)) is 100 times its velocity, then its value in terms of its mass (\( m \)) and Planck constant (\( h \)) is:
The degeneracy of hydrogen atom that has energy equal to \(-\frac{R_H}{9}\) is (where \( R_H \) = Rydberg constant)
In which mode of expression, the concentration of a solution remains independent of temperature?
A 1 L closed flask contains a mixture of 4 g of methane and 4.4 g of carbon dioxide. The pressure inside the flask at 27\degree C is (Assume ideal behaviour of gases):

One main scale division of a vernier caliper is equal to \( m \) units. If the \( m \) divisions of the main scale coincide with the \( (n + 1)^{\text{th}} \) division of the vernier scale, the least count of the vernier caliper is:

Identify the logic operation performed by the following circuit. 
 

A reverse biased zener diode when operated in the breakdown region works as:

Identify the logic gate given in the circuit: 


 

Identify the correct output signal \( Y \) in the given combination of gates for the given inputs \( A \) and \( B \) shown in the figure.