Boron and silicon of very high purity can be obtained through :

Among the following compounds, geometrical isomerism is exhibited by :

Adsorption of a gas follows Freundlich adsorption isotherm. If x is the mass of the gas adsorbed on mass
m of the adsorbent, the correct plot of $${x \over m}$$ versus p is :

The correct statement about probability density (except at infinite distance from nucleus) is :