Class 12th

A Chromatography column, packed with silica gel as stationary phase, was used to separate a mixture of compounds consisting of (a) benzanilide, (b) aniline and (c) acetophenone. When the column is eluted with a mixture of solvents, hexane; ethyl acetate $(20:80)$ , the sequence of obtained compounds is

Among the statements $(a-d)$ , the incorrect ones are:

For the following reactions:

where,

${\mathrm{k}}_{\mathrm{s}}$ 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

 

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

Four resistances of $15\mathrm{\Omega },12\mathrm{\Omega },4\mathrm{\Omega }$ $$ and $$ $10\mathrm{\Omega }$ respectively in cyclic order to form Whetstone's network. The resistance that is to be connected in parallel with the resistance of $10\mathrm{\Omega }$  to balance the network is

Match the following

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]

Consider the following reactions:

Which of these reactions are possible?

Consider the following reaction:

The product ' $$ ' is used

The equation that is incorrect is