Question

15. In groundwater, a saturated zone under pressure is also called: a. a confined aquifer b. an unconfined aquifer c. an aquitard d. a vadose zone e. a water table f. a hydraulic gradient

Answer 1

Ans:

1.) In Ground Water a saturated zone under pressure is called -

a.) a Confined Aquifer.

Reason: (making with underline to understand)

As this Aquifer below the Ground i.e. saturated with water. These Layers of impermeable material are both above and below the aquifer, causing it to be under pressure (as per this Question) so that when the aquifer is penetrated by a well, the water will rise above the top of the aquifer. So this is named as Confined Aquifer

2.) The presence of which of the following contributes to Acid rain -

a.) Oxygen.

b.) Carbon

c.) Sulfur,

d.) Nitrogen

Reason: (making with underline to understand)

Majorly that create acid rain are Sulfur dioxide (SO2) and Nitrogen oxides (NOX). Acid rain usually forms high in the clouds where SO2 and NOX react with water and Oxygen. This forms SULFURIC ACID and NITRIC ACID in the atmosphere.

Another weaker part making of acid rain is carbon which forms - CO2 i.e.Carbon dioxide in the air can dissolve in rain water to form carbonic acid, H2CO3. Carbonic acid is a weak acid.