Question Discussion & Solution

The correct answer is In 1982.

• The National Bank for Agriculture and Rural Development (NABARD) is a top-level development financial institution in India, established in 1982 to provide agricultural and rural credit.

Key Points

• National Bank for Agriculture and Rural Development (NABARD) is the apex institution of Rural Credit.
• It was established on 12 July 1982 by the merger of Agriculture Credit Department and reconstruction of Agriculture and Development Corporation of the Reserve Bank of India.
• Its establishment is based on the recommendations of Shivraman Committee.
• Food stocks are maintained by the Central Government for three purposes:
  • Maintaining prescribed buffer stock norms for food security,
  • Monthly supply through Public Distribution System (PDS),
  • Market intervention to stabilise open market prices.

The correct answer is Mansagar Lake.

• Jal Mahal is situated in the middle of Mansagar Lake.

Key Points

• Jal Mahal literally means the “Water Palace”, but when it was built, Maharaja Madho Singh I did not intend to use it as a palace.
  • Instead, it was supposed to be a hunting lodge for the king and his entourage during their duck hunting trips.
  • The palace stands in the middle of Man Sagar Lake.
  • The Jal Mahal is designed in a classic Rajput manner, with pink sandstone in a symmetrical style.
• Mansagar Lake
  • Man Sagar Lake is an artificial lake, situated in Jaipur.
  • It is named after Raja Man Singh, the then ruler of Amer, who constructed it in c. 1610 by damming the Dravyavati river.
  • The Jal Mahal is situated in the middle of the lake.

Additional Information 

• Kayalana Lake
  • Kaylana Lake is located 8 km west of Jodhpur.
  • It is an artificial lake, built by Pratap Singh in 1872. 
• Foy Sagar Lake 
  • ​Lake Foy Sagar is an artificial lake situated near Ajmer.
  • It is named after the engineer Mr Foy, an Englishman, who created it under a famine relief project in 1892.
• Anasagar Lake
  • ​Ana Sagar Lake is an artificial lake situated in the city of Ajmer.
  • It was built by Arnoraja, the grandfather of Prithviraj Chauhan, in 1135 -1150 AD.

The pattern is as follows:

The first letter in each group is a series of vowels in reverse alphabetical order.

The second letter in each group is the opposite letter to the first one.

Hence, “AZ” is the correct answer.

The correct answer is Lead and Tin.

Key Points

• Soldering is the process of joining two metal objects together by a third soft metal alloy which is called solder.
• Solder is a metal alloy that melts at a lower temperature than the metals being soldered.
• A commonly used alloy is solder, which is an alloy of tin (Sn) and lead (Pb).
• The alloy of tin-lead solder is a mixture of 63% tin and 37% lead. 63/37 solder melts at 183°C.
• So, Alloy of tin (Sn) and lead (Pb) is used for welding electrical wire together.

Additional Information

• Element Tin (Sn) belongs to Group 14 of the periodic table.
  • Atomic Number - 50
  • Atomic Mass  - 118.710 amu.
• Element Lead (Pb) belongs to Group 14.
  • Atomic Number - 82
  • Atomic Mass - 207.2 amu.

The correct answer is Thymine and Cytosine.

Key Points

• The pyrimidines in DNA are C & T. In RNA, U replaces T.

• Cytosine (C) formula is C₄H₅N₃O and Thymine (T) formula is C₅H₆N₂O₂.

Additional Information

• Deoxyribonucleic acid, commonly known as DNA, is the hereditary complex molecule present in humans and almost all other organisms.
• The information in DNA (double helix structure) is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T).
  • DNA has two base pairs, A-T and G-C, attached to a sugar-phosphate backbone.
• DNA is a long molecule that contains our unique genetic code.
  • It holds the instructions for making all the proteins in our bodies and the function of living things.
• In the cell nucleus, the DNA (deoxyribonucleic acid) molecule is packaged into thread-like structures called chromosomes.
  • A chromosome (microscopic structure) is made up of DNA tightly coiled many times around proteins called histones that support its structure.
  • A chromosome has two arms - a p arm (short arm) and a q arm (long arm), joined in the location of the centromere.

• Watson and Crick Proposed the Double Helix structure of DNA with the two strands connected by hydrogen bonds.