Which kingdom is characterized by the presence of a rigid cell wall and nucleoprotein as genetic material?

Which one of the following statements is incorrect about menstruation?

Let $2 \sin^2 x + 3 \sin x - 2 > 0$ and $x^2 - x - 2 < 0$. ($x$ is measured in radians). The $x$ lies in the interval

The radiation emitted by a star $A$ is $10,000$ times that of the sun. If the surface temperatures of the sun and the star $A$ are $6000 \ K$ and $2000 \ K$ respectively,the ratio of the radii of the star $A$ and the sun is (in $:1$)

Which mixture forms a buffer when dissolved in $1 \, L$ of water?

Among the following compounds,which one is not responsible for the depletion of the ozone layer?