On heating copper nitrate strongly,$.......$ is finally obtained.

Which substance is used to produce smoke screens?

Discuss the reactivity of group $14$ elements towards water and halogens.

Which of the following statements is correct with respect to the properties of elements in the carbon family as the atomic number increases?

Which of the following compounds of elements in group $14$ would you expect to be most ionic in character?

$Si_3O_9^{-6}$ (having three tetrahedral units) is represented as: