Question Discussion & Solution

A scalar is a quantity which has only a magnitude but not a direction whereas vector is a quantity which has both a magnitude and a direction.

Volume is a scalar quantity similarly, momentum is a vector quantity while time, speed and energy are the scalar quantities.

The correct answer is 60%.

Key Points

• Rajasthan is India's only state that has a real hot desert within its territory.
  • Vast stretches of sand dunes of different kinds - longitudinal dunes, barchans, transverse dunes - are characterized by physiography.
  • Almost 60% area of the THAR Desert in India falls in Rajasthan.

Additional Information

• In reality, a portion of the Thar Desert extending into Pakistan is the Great Indian Desert, covering the districts of Barmer, Jaisalmer, Jalor, Jodhpur, Bikaner, Ganganagar, Churu, Jhunjhunun, Sikar, Nagaur, and Pali.
• The total area of the arid tract is 233,100 square kilometres or approximately three-fifths of the Rajasthan State.
• The rock exposures in the Thar region are predominantly of Aravali gneiss and schist, Malani granites, and Vindhyans, indicating that Thar is part of the peninsular block's western extension.
• Jurassic and Eocene marine formations belong to the rock exposures in the Barmer - Jaisalmer - Bikaner tract to the extreme west and north, whereas those in the central area of Jalor - Siwana - Jodhpur - Khinwasar tract are of igneous rocks, often overlaid by Vindhyan sedimentaries.
• There is also proof of a great culture that had flourished in the past there.
• The deep-seated formations, such as the Jaisalmer Lathis, are small potable water zones with local recharge facilities.
• The blown sand superimposes large stretches of alluvium contributed by ancient rivers in their submerged channels.
• Recurring aridity has endowed this tract with items such as gypsum, potash, common salt, at different stages of geological times. Phosphorus, and bentonitic and ceramic clays.

Important Points

•  The question has been cancelled

CONCEPT:

• The pressure cooker is based on the principle that the boiling of water increases with the increase in pressure.

EXPLANATION:

• When we give heat to the pressure cooker then due to an increase in temperature the steam generated in the vessel.
• Due to this generated steam, the pressure inside the vessel increases. So the food gets cooked soon.
• Thus by the application of pressure the boiling point of the water increases. Hence option 1 is correct.
• There is no relation between food-grains with the boiling point of water. So options 2, 3, and 4 are wrong.

The correct answer is the 15th Bengal Native Infantry.

• The battalion that rebelled at Nasirabad in 1857 was the 15th Bengal Native Infantry.
  • The first rebellion in Rajasthan took place on 28 May 1857 at Naseerabad
  • News of Meerut Rebellion AGG (Agent to Governor-General) George Patrick Lawrence and he sent the 15th Bengal Native Infantry based at Ajmer to Nasirabad, causing discontent among the soldiers.
  • Soon the news of the revolt of the soldiers reached the soldiers in Nasirabad as well and on 28 May 1857, the soldiers of the Native Infantry revolted in Nasirabad.
  • The soldiers of the 30th Native Infantry also joined in and after burning and capturing the soldiers of the cantonment left for Delhi.

Additional Information

6 British Cantonments in Rajasthan are: 

The correct answer is option 2 i.e 19.

• Potassium is a member of the alkali group of the periodic table.
  • Symbol: K.
  • Atomic number: 19.
  • Belongs to group 1 in the periodic table.
  • First isolated in 1807 by Humphry Davy.
  • Sodium and Potassium are the elements known as soft metals(can cut with a knife with little force).
  • Potassium metal is kept in kerosene due to its high reactivity with water.
  • Potassium bicarbonate is the chemical used in fire extinguishers.
  • Potassium is the most common radioisotope in the human body.
  • Potassium is the second least dense metal after lithium.
• Atomic Number 17: Chlorine.
• Atomic Number 18: Argon.
• Atomic Number 20: Calcium.