Dry bleaching is done by

Which one of the following oxides is expected to exhibit paramagnetic behaviour?

Which substance is used to produce smoke screens?

Which of the following,on reaction with water,will have a $pH$ less than $7$?

Carbon and silicon both belong to group $14$, but despite the stoichiometric similarity, their dioxides (i.e., carbon dioxide and silicon dioxide) differ in their structures. Comment.

Which of the following are methanides?