Three elements needed for the healthy growth of plants are_________________?

Related Mcqs:

Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing___________________?

A. NH2Cl B. NHCI2 C. NCI2 D. all of the above...

Acid present in acid rain may be__________________?

A. H2SO4 B. HNO3 C. both A and B D. none...

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...

Major cause of SO2 on global scale is__________________?

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

The yellow colour in photochemical smog is due to presence of__________________?

A. dinitrogen oxide B. nitrogen dioxide C. chlorine gas D. chlorine dioxide...