Which metal is protected by a layer of its own oxide?

Which of the following is not a broad spectrum antibiotic?

$\alpha-D$-Glucopyranose and $\beta-D$-Glucopyranose are

If $\int \frac{dx}{(1+\sqrt{x}) \sqrt{x-x^2}} = \frac{A \sqrt{x}}{\sqrt{1-x}} + \frac{B}{\sqrt{1-x}} + C$,where $C$ is a real constant,then $A+B$ equals to

Vegetative propagation in Pistia occurs by:

The correct order of energies of $d-$ orbitals of a metal ion in a square planar complex is: