Tick (√) the most appropriate answer.
A gas which dilutes the activity of oxygen in air is :
(a) carbon dioxide
(b) sulphur dioxide
(d) noble gases
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Sulphur dioxide gas dissolves in water to form ___________ acid.
Statement given below is incorrect. Write the correct statement :
During thunder and lightning, nitrogen and oxygen combine to form nitrogen dioxide gas.
MULTIPLE CHOICE QUESTIONS:
A fuel when used releases least amount of pollutants in the air.
(a) sulphur dioxide