Ozone hole is substantial depletion of ozone in every year during__________________?

Related Mcqs:

Which statement is wrong ?

A. the amount of ozone layer is greater in the region close to the equator B. ozone acts as filter for UV radiations C. in the equatorial region it acts as pollutant D. CFCs play effective role in removing O3 in the stratosphere...

In the purification of portable water the coagulant used is_________________?

A. alum B. nickel sulphate C. copper sulphate D. barium sulphate...

Newspaper can be recycled again and again how many times ?

A. 2 B. 3 C. 4 D. 5...

Which of the following is not a secondary pollutant_________________?

A. ozone B. carbonic acid C. sulphuric acid D. carbon dioxide...

Major cause of SO2 on global scale is__________________?

A. volcanoes B. electric sparks C. combustion D. all...