Nonmetals: Position in periodic table, preparation, properties and uses of hydrogen, oxygen and nitrogen

Which of the following represents water gas?

Bromine belongs to which of the following categories?

Which isotope of hydrogen is radioactive?

In which of the following is hydrogen gas used?

Chlorine is used as a bleaching agent. This bleaching property is due to

The bond order of oxygen molecules, superoxide ion and peroxide is/are :

What is the number of isotopes of Hydrogen?

Haber's process is used for the manufacturing of which of the following?

Which of the following gases is used in an electric bulb?

Which isotope of Hydrogen does not have neutron in the nucleus :

Which of the following statements about ortho and para hydrogens is correct?