Which of the following is used in the industrial production of nitric acid by the Ostwald process?

Haemozoin is a

The component of vector $\overrightarrow{A} = a_x \hat{i} + a_y \hat{j} + a_z \hat{k}$ along the direction of $\hat{i} - \hat{j}$ is

$A$ $20 \, cm$ length of a certain solution causes right-handed rotation of $38^\circ$. $A$ $30 \, cm$ length of another solution causes left-handed rotation of $24^\circ$. The optical rotation caused by a $30 \, cm$ length of a mixture of the above solutions in the volume ratio $1 : 2$ is:

The decreasing order of bond dissociation energies of $C-C$,$C-H$,and $H-H$ bonds is:

Sertoli cells are regulated by the pituitary hormone known as: