Question Discussion & Solution

Option 3 is correct, i.e. p-block.

• Modern Periodic Table:
  • The Modern Periodic Table is classified into the following elements - p-block, s-block, d-block, and f-block.
  • The p-block elements include chalcogens, pnictogens, halogens, inert gases.
    • The 18^th group is known as Inert gas, zero groups, Nonreactive gases.
    • The 17^th group is known as Halogen.
    • The 16^th group is known as Chalcogen.
    • The 15^th group known as Pnictogen.
    • Pnictogen group refers to the choking property of nitrogen gas (as opposed to air, which contains oxygen as well as nitrogen).
    • Nitrogen family elements consist of atoms having 5 electrons in their outer energy level. Two of the electrons are in the s subshell, with 3 unpaired electrons in the ​p subshell.
  • The s-block elements include alkali metals and alkaline earth metals. 
  • The d-block elements include Transition elements.
  • The f-block elements include Inner Transition Elements.

CONCEPT:​

• Power of Lens: The inverse of the focal length is known as the power of the lens.
  • It shows the bending strength for the light ray of the lens.

\(P = \frac{1}{f}\)

where P is the power of the lens and f is the focal length of the lens.

• The unit of power of a lens is Dioptre when the focal length of the lens is taken in meter (m).
• The focal length of the convex lens (converging) is positive and that of the concave lens (diverging) is negative. 

CALCULATION:

Given that lens is diverging. so focal length is negative.

f = -5 cm = -0.05 m

Power of lens \(P = \frac{1}{f} =\frac{1}{-0.05} = -20 D\)

P = -20 D

So the correct answer is option 2.

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

The correct answer is Karauli.

• The princely state of Karauli was founded by the Yaduvanshi ruler Arjun Singh under the name Kalyanpuri in Vikram Samvat 1405 (1348 AD), which later became Karauli in the period.

Key Points

• The ruler of Karauli, Harvakshpal Singh, made a treaty with the British.
• Karauli was the first princely state of Rajasthan, which made the first treaty with the British.
• Anjani Mata is the local deity of the princely state of Karauli.

Additional Information

• Karauli State was a princely state in India.
  • It existed from 1348 to 1949.
  • It is located in the Braj region.
  • Its capital was Karauli city.
• The important towns associated were Mandrayal or Mandrail.
• The 32nd district of Karauli Rajasthan was created on 19 July 1997, separated from Sawai Madhopur.
• Ramgopal Vijayvargiya was a well-known painter from Karauli, who started the solo painting exhibition tradition.

Important Points

• Lootmar Holi / Lathmar Holi of Mahavir Ji (Karauli) is very famous.
• Shivaratri Cattle Fair - This fair starts on Phalgun Krishna Trayodashi.
  • This fair is famous for the purchase and sale of cows of the Haryanvi breed.

The correct answer is Ajmer.

Key Points​​

• Luni river:
  • The river originates at the confluence of two streams Saraswati and Sagarmati near Govindgarh of Ajmer district.
  • It flows in Ajmer, Nagaur, Pali, Jodhpur, Barmer. Jallore and drains in Rann of Kutch.
  • The water is fresh till Balotars of Barmer after that its water becomes salty.
  • The main tributaries of Luni joining from the left are the Lilri, the Guhiya, the Sukri, the Jawai, the Bandi (Hemawas), the Khari Bandi, the Sukri Bandi, and the Sagi.
  • Jojri is the only major tributary that joins the Luni river from the right.
  • The Dantiwada dam and the Sipu dam are constructed on the Luni river.
  • The main irrigation scheme in the Luni basin is Jawai dam, Jaswant Sagar dam, Hemavas, Sardar samand.

Additional Information

• Jaipur:
  • ​​Banganga, Bandi, Dhund, Morrel, Sabi are the river that flows in Jaipur.
  • Jaipur is also known as the 'Pink City', of India.
• Udaipur:
  • ​Banas, Ahar, Berach, Wakal, Gomti, Som, Jakham, Sabarmati, Sei are the river that flows in Udaipur.
• Nagaur:
  • ​​Luni, Mantha, Harsor are the rivers that flow in Nagaur.