Question Discussion & Solution

An ohmmeter is an electrical instrument that measures electrical resistance. Similarly, barometer is a scientific instrument that is used to measure air pressure in a certain environment.

• Charles Robert Darwin,in his book “The Origin of Species”, gave the Theory of Evolution by Natural Selection.
• Gregor Johann Mendel, also known as the father of genetics, gave the Law of Inheritance.
• The theory of origin of life on earth proposed by Haldane was confirmed by the experiments conducted by Stanley L. Miller and Harold C. Urey in 1953.

The correct answer is Mewar.

• The king and chieftain of Mewar gave Khurram the title of Shah Jahan in Badal Mahal on his arrival from Surat to Udaipur.

Key Points

Some important information about Khurram as follows- 

Additional Information

• Some of the battles between Mughals and Rajputs:
  • Siege of Bayana​
    • Rana Sanga led the Rajput army sieged the fortress of Bayana held by Nizam Khan in Feb 1527. 
    • Babur sent a detachment under Mohammad Sultan Mirza to relieve the fortress, the Mughal contingent failed to take the fort of Bayana.
  • Battle of Khanwa
    • Rajput Confederacy under Rana Sanga was defeated by Babur in 1527.
    • This was the largest battle ever that happened between the Mughals and Rajputs involving a total of more than 150,000 soldiers.
  • Siege of Chittorgarh
    • Akbar led the Mughal army besieged the famed Chittorgarh fort in 1567, which was then under command of Jaimal Rathore and Patta Singh Sisodia, commanders of Udai Singh.
    • The siege went on for 4 months and finally after the death of Jaimal, the fortress walls breached, that ensued Mughals emerged victoriously.
  • Siege of Ranthambore (1568)
    • Rao Surjan Hada had to surrender Ranthambore Fort to Akbar after later successfully put the fort under siege.
  • Battle of Dewair
    • The first battle of Dewair took place in 1582 between armies of Maharana Pratap and Mughal Garrison of dewair. Pratap's army defeated the Mughal army in this battle.
    • Maharana Amar Singh defended against the Mughal army led by Prince Parviz and Asaf Khan in 1606 resulted in stalemate. 

First is managed by the second.

Thus, Jailor is the related to prison.

The correct answer is citric.

• Orange juice contains citric acid due to which tastes sour.

Key Points

• Fruits that contain citric acid are called citrus fruits.
• Citrus fruits are lemon, lime, orange, Grapefruit, etc.
• The formula of citric acid is C₆H₈O₇.

Additional Information

• Oxalic acid is found in tomato.
  • Its formula is C₂H₂O₄.
• Formic acid is found in the sting of ants and bees.
  • Its formula is CH₂O₂.
• Acetic acid is found in vinegar.
  • Its formula is id CH₃COOH.