In liquation process used for tin (Sn), the metal :

Given below are two statements.

Statement I : Stannane is an example of a molecular hydride.

Statement II : Stannane is a planar molecule.

In the light of the above statement, choose the most appropriate answer from the options given below.

When borax is heated with $$\mathrm{CoO}$$ on a platinum loop, blue coloured bead formed is largely due to :

Dinitrogen is a robust compound, but reacts at high altitudes to form oxides. The oxide of nitrogen that can damage plant leaves and retard photosynthesis is :