UPSC CDS Science Chemistry Questions Part 1

Among the given items, coal is a non-renewable resource. A nonrenewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption. Most fossil fuels, such as oil,natural gas and coal are considered non-renewable resources in that their use is not sustainable because their formation takes billions of years. Sunlight, water, wind, fisheries, rain, tides, waves and geothermal heat are some examples of renewable resources.