Question : Which of the following is a highly electropositive element that readily gives up an electron to obtain a stable electronic configuration?

Option 1: Chlorine(Cl)

Option 2: Oxygen (O)

Option 3: Sodium(Na)

Option 4: Nitrogen(N)

Question : Helium is added to the oxygen supply of deep-sea divers because it is 

Option 1: less poisonous than nitrogen

Option 2: lighter than nitrogen

Option 3: readily miscible with oxygen

Option 4: less soluble in blood than Nitrogen at high-pressure

Question : Which of the following is an inert gas?

Option 1: Hydrogen

Option 2: Nitrogen

Option 3: Oxygen

Option 4: Argon

Question : ______ gas is used for the manufacturing of bleaching powder.

Option 1: Nitrogen

Option 2: Sulphur

Option 3: Oxygen

Option 4: Chlorine

Question : The mercury and sodium street lamps light up because of:

Option 1: Atomic emission

Option 2: Atomic absorption

Option 3: Electron emission

Option 4: Electron absorption

Question : The elements known as primary nutrients for plants are:

Option 1: nitrogen, phosphorus and potassium

Option 2: nitrogen, oxygen and silicon

Option 3: potassium, boron and nitrogen

Option 4: nitrogen, phosphorous and iron