Question Discussion & Solution

The Indian Standard Time (IST) :

• The Indian Standard Time is calculated from 82°30’E meridian passing through Mirzapur.
• IST is plus 5.30 hours from the GMT. 
• It does not take into account daylight saving time along with other seasonal factors. India has only one timezone.

Greenwich Mean Time (GMT) : 

• Greenwich Mean Time (GMT), the name for the mean solar time of the longitude (0°) of the Royal Greenwich Observatory in England. 
• The meridian at this longitude is called the prime meridian or Greenwich meridian.

Important Points

International dateline :

• The prime meridian also helps establish the International Date Line.
• The Earth's longitude measures 360o, so the halfway point from the prime meridian is the 180 longitude line.
• The meridian at 180 longitudes is commonly known as the International Date Line.
• As you pass the International Date Line, you either add a day (going west) or subtract a day (going east.)

The correct answer is North Western region.

Key Points

• In the summer season-low, air pressure area of Rajasthan is found in the North-Western region.

Additional Information 

• The low-pressure area, low area or low is a region where the atmospheric pressure is lower than that of surrounding locations.
• Low-pressure systems form under areas of wind divergence that occur in the upper levels of the atmosphere.
• The formation process of a low-pressure area is known as cyclogenesis.

The correct answer is Junagadh - Bundi.

• Junagadh - Bundi pairs of the district with the fort and its location is not correctly matched.

​Key Points

• Junagadh Fort
  • Junagarh Fort is a fort located in the Bikaner, Rajasthan.
  • The fort was originally called Chintamani and was renamed Junagarh or "Old Fort" in the early 20^th century when the ruling family moved to Lalgarh Palace outside the fort limits.
  • It is one of the few major forts in Rajasthan which is not built on a hilltop. 

Additional Information

• Kumbhalgarh fort
  • The fort of Kumbhalgarh, in its current shape and form, was a creation of Mewar's ruler Kumbha in the 15th century. 
  • It is located in Rajasmand.
• Mehrangarh Fort
  • Mehrangarh is located in Jodhpur, Rajasthan.
  • It is one of the largest forts in India.
  • Built around 1459 by Rao Jodha.
• Ranthambore Fort
  • Ranthambore Fort is located in Sawai Madhopur, 
  • King Jayant, also a Chauhan Rajput, built the Ranthambore Fort during 1110 AD.

New Delhi is the official capital of India.

The correct answer is Parabolic.

Key Points

• Parabolic dunes and sand sheets are widely distributed and are dominant classes in the Thar Desert.
• Other classes of land cover observed were canal, saline area, salt lake, and protected plantation.
• The Thar desert is the most fragile ecosystem of India.
  • The Luni River is the only river integrated into the desert.
• Rainfall is limited to 100–500 mm (4–20 inches) per year.
• Its low and uncertain rainfall, high temperatures, high wind speeds, and a rolling sandy topography dominated by 10 to 40 m high Sand dunes.
• In the western part of Rajasthan in India and adjoining part of Pakistan, between the Aravalli Hill Ranges and the adjoining Indus valley.

Important Points

• Five types of sand dune classes were observed: parabolic, barchan, longitudinal, transverse, and sand sheet.