Question

The deserts of West Rajasthan receive very little rainfall because __________.
A. It lies in the rain-shadow region.
B. It has no high mountains to prevent the rain – bearing clouds from crossing over.
C. It is away from the sea.
D. The region is too hot to permit precipitation

Answer 1

Hint: The west is in some ways definitive Rajasthan, with all the fantasy of desert dunes, majestic forts and camel caravans. Most of the region is enclosed by the Thar Desert, which also extends into Punjab, Gujarat and Pakistan.

Complete answer:
-A major part of the western Rajasthan is covered by the Thar desert. This region withstands a temperature of 40°C to 45°C. It even increases to an ultimate temperature of 49°C during summer. Such hot temperatures do not allow precipitation and as an outcome there is very little rainfall. Moreover, Rajasthan is nearer to the Equator.
-The Western Rajasthan suffers from scarcity of rainfall. The average annual rainfall in the area is calculated to be 350 mm per year and above that the rainfall structure in the area shows large variability and has never been constant.
-The absence accompanied by variability creates water stress situations in the area and is accountable for droughts.

Hence, The correct option is D.

Note: -Rajasthan remains hot and dry. Due to the desert area, trees are very rare and natural water sources are few. Greenery is the primary basis to attract rain, which is not there, hence clouds passing through and not raining.
-The Thar desert region of Rajasthan undergoes the highest diurnal span of temperature because it is in the inner part where the differences in temperature are very high.