What is the shape of an ookinete?

The oxide,which cannot act as a reducing agent,is

The solution of $\tan y \frac{dy}{dx} = \sin(x+y) + \sin(x-y)$ is

Which of the following is true in the case of an adiabatic process,where $\gamma = C_p / C_V$?

An infinitely long thin straight wire has a uniform linear charge density of $\frac{1}{3} ~Cm^{-1}$. The magnitude of the electric field intensity at a point $18 ~cm$ away is (given $\varepsilon_0 = 8.85 \times 10^{-12} ~C^2 N^{-1} m^{-2}$):

$HCl$ is added to the following oxides,which one would give $H_2O_2$?