Class 12th

For the following reactions:

${\mathrm{k}}_{\mathrm{s}}$ and ${\mathrm{k}}_{\mathrm{e}}$ are respectively, the rate constant for substitution and elimination, and $\mu =\frac{{\mathrm{k}}_{\mathrm{s}}}{{\mathrm{k}}_{\mathrm{e}}}$ , the correct option is

Identify the correct Logic Gate for the following output (Y) of two inputs A and B.

A hydrogen atom in its ground state absorbs 10.2 eV of energy. The angular momentum of electron of the hydrogen atom will increase by the value of: 

(Given, Planck's constant  = 6.6 * 10^-34 Js).

Consider a light ray travelling in air is incident into a medium of refractive index $\sqrt[]{2n}.$  The incident angle is twice that of refracting angle. Then, the angle of incidence will be:

In the following reaction sequence, structures of $A$ and $B$ respectively will be

An observer moves towards stationary source of sound with a velocity equal to one-fifth of the velocity of sound. The percentage change in the frequency will be:

The number of possible optical isomers for the complexes ${\mathrm{M}\mathrm{A}}_2{\mathrm{B}}_2$ with ${\mathrm{s}\mathrm{p}}^3$ and $\mathrm{d}\mathrm{s}\mathrm{p}{\mathrm{p}}^2$  hybridized metal atom, respectively is:
[Note: A and B are unidentate neutral and unidentate monoanionnic ligands, respectively]

A force of 10 N acts on a charged particle placed between two plates of a charged capacitor. If one plate of capacitor is removed, then the force acting on that particle will be.

An α particle and a carbon 12 atom has same kinetic energy K. The ratio of their de-Broglie wavelengths   $\left({\lambda }_{\alpha }:{\lambda }_{C12}\right)is:$

Consider the following reactions:

Which of these reactions are possible?