Which of the Following is not a Noble Gas ?
Answer : (1). Hydrogen
Noble Gases : In modern periodic table , elements are grouped on the basis of its chemical properties and some other properties.
In modern periodic table extremely last or right side group is 18th group, it is known as Noble Gas group or family.
The noble gases are non reactive elements they does not react with any elements, all of these are exist in gaseous state.
They are also known as Inert gas . Example : Helium, Neon, Argon, Krypton, Xenon, Radon.
Uses of Noble gas : Helium is used in balloons, Neon is commonly used in lamps, Argon is commonly used in welding as an inert gas.