$P_2O_5$ is heated with water to give:

In $P_4$ (tetrahedral) molecule:

Identify the product obtained when excess chlorine reacts with ammonia.

Identify the $INCORRECT$ statement$(s)$ among the following:
$(I)$ Moist ammonia gas can be dried by using anhydrous $CaCl_2$
$(II)$ Phosphine is a weaker base than ammonia
$(III)$ $R_3SiCl$ produces very complex cross-linked polymeric silicone on hydrolysis
$(IV)$ When metallic copper reacts with $6 \ M$ $HNO_3$,$NO_2$ is the only product

Which of the following gases is diamagnetic and neutral towards water?

Explain the molecular structure and properties of phosphorus trichloride $(PCl_{3})$.