What will be the result of subjecting a blue litmus to chlorine gas?

What is the oxidation state of nitrogen in di-nitrogen trioxide?

Which of the following noble gases is most soluble in water?

Which group 16 element is the most electronegative?

What catalyst is used for oxidation of ammonia to produce nitric acid?

Which of the following is most stable?

Which of these gases is released upon treating zinc with diluted and then concentrated nitric acid?

Which of the following is a suitable test to identify presence of chlorine atoms or ions?