p-block

The most abundant noble gas in atmosphere is

Which of the following is the most abundant element in universe?

Which of the following compounds is an example of Freon?

Oil of vitriol is

Which is the most stable allotrope of sulphur at room temperature ?

What is the highest oxidation state exhibited by group 17 elements (except fluorine)?

Identify the group of periodic table that contains element Astatine.

What is the formula of Tin (IV) oxide?

In the upper layers of atmosphere ozone is formed by the

In the contact process, the catalyst used is

Which among the following compound does not act as reducing agent?

Which of the following inert gases is used for magnetic resonance imaging?

What is the oxidation state of iodine in $\mathrm{I}_{2} \mathrm{Cl}_{6}$ ?

The correct order of acidity of hydrogen halides is

Which of the following has an open chain structure?