It is now possible to breed plants and animals with desired characters through

The conjugate acid of $NH_2^-$ is

If $u=\sin ^{-1}\left(\frac{x^2+y^2}{x+y}\right)$ then $x \frac{\partial u}{\partial x}+y \frac{\partial u}{\partial y}$ is equal to:

In which of the following combinations is buffer action expected?
$A$. $NH_4OH + NH_4Cl$
$B$. $HCl + NaCl$
$C$. $NH_4OH + HCl$ in $2 : 1$ mole ratio
Select the correct answer using the code given below:

In the process of transcription,the sigma factor is important for:

What is the oxidation state of sulfur in cyclic sulfur trioxide $(S_3O_9)$?