Question : What is the correct percentage by volume of various gases in Earth's atmosphere?

Option 1: 20.95% nitrogen, 78.09% oxygen and 0.04% carbon dioxide and other greenhouse gases

Option 2: 10.95% nitrogen, 88.09% oxygen and 0.09% carbon dioxide and other greenhouse gases

Option 3: 10.95% nitrogen, 78.09% oxygen and 0.03% carbon dioxide and other greenhouse gases

Option 4: 78% nitrogen, 21% oxygen and 0.03% carbon dioxide and other greenhouse gases

Question : Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth?

Option 1: Carbon dioxide

Option 2: Oxygen

Option 3: Carbon monoxide

Option 4: Nitrogen

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

Question : The major constituent of air is

Option 1: Nitrogen

Option 2: Carbon dioxide

Option 3: Oxygen

Option 4: Hydrogen

Question : Silver gets corroded due to_________in air.

Option 1: oxygen

Option 2: Hydrogen sulphide

Option 3: Carbon dioxide

Option 4: Nitrogen