Helium mixed with oxygen is used in the treatment of:

While phosphorus form PCl₅, nitrogen does not form NCl₅ because

Ordinary glass is a combination of the following

Carbogen to

Which of the following is used in the preparation of generated water (soda)

Which one of the following compounds in aqueous solution gives a white precipitate with perichloric acid ?

Bond energy of Cl₂,Br₂ and I₂ follow the order

The correct order of reducing abilities of hydrides of V group elements is

The number of sigma and pi bonds in peroxodisulphuric acid are, respectively

"Fluorosis" disease is caused due to the reaction of ________ with excess of fluoride in the body