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What else can I help you with?
Is oxygen useful or harmful?
It is useful because we can breathe it.
Is rusting of iron harmful or useful?
Rusting is an oxidation reaction.
How is ozone can be harmful or useful when it absorbs ultraviolet rays and changes into normal oxygen?
Ozone is useful. The oxygen forms again transforms to form ozone.
When petrol gives off exhaust fumes useful or harmful reaction?
It is harmful because it is killing our poor little green planet! :-(
Is it useful or harmful reaction when Petrol is used in car engine?
Petrol is British name for Gasoline
Is there more useful reaction than harmful?
Your question does not contain enough information to be answered. What reactions? In what? To what?
Is it useful or harmful when ozone in the upper atmosphere absorbs ultraviolet rays and changes into normal oxygen?
The oxygen formed in upper atmosphere is not for breathing. It forms again into ozone by natural phenomenons.
Are lions harmful or useful?
lion are useful and harmful
Is a ameoba harmful or useful?
It is not harmful. Also it is not useful
Is oxygen is the harmful or useful gas?
Oxygen is a vital gas necessary for human and animal survival. It is used by cells in the body to produce energy. However, excessive exposure to pure oxygen can be harmful and toxic, leading to lung damage or even fire hazards in certain conditions.
What are Useful and Harmful Changes?
The changes talking place in our surroundings and which are useful to us are called Useful changes. The changes which are not useful but harmful are called Harmful changes
Parts of a car start to go rusty is this a useful or harmful reaction?
its harmful because when metal goes rusty it looses it power and then eventually the car will fall apart.
