The correct answer is ​United Arab Emirates.

Key Points 

 G20:

• Founded in 1999.
• It is an international forum for the governments and central bank governors.
• Aim- To discuss the policies pertaining to the promotion of international financial stability.
• Members: 
  • ​19 countries and the European Union (EU). 
  • Argentina, Australia, Brazil, Canada, China, France, Germany, India, Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, South Korea, Turkey, the United Kingdom, the United States and the European Union.
• Union Commerce and Industry Minister recently attended the 2nd G20 Virtual Trade & Investment Ministers Meeting, held through video-conferencing.

Additional Information 

• India will assume the presidency of the G20 (Group of Twenty) for a year starting 1 December 2022 and is expected to host over 200 meetings across the country during its presidency tenure.
• The next G20 summit will be held in New Delhi on September 9 and September 10, 2023.
• The G20 presidency keeps rotating every year among member nations.
• The country holding the presidency, together with the previous and next presidency-holder, forms the ‘Troika.’

The correct answer is Sodium.

Key Points

• The chemical element sodium has the atomic number 11 and the symbol Na.
• It is a delicate, silvery-white metal that is exceedingly reactive.
• Due to its placement in group 1 of the periodic table, sodium is an alkali metal.
• Due to its extremely reactive nature, it is not found as a pure metal in nature.
• Because sodium is so intensely reactive, even simply water alone can set off explosions.

Additional Information

• Copper:
  • On a scale of reactivity, copper is low.
  • Its malleability and low reactivity make it perfect for usage in architecture.
  • Copper may be carved and hammered into intricate forms.
  • It will shield itself with a patina, a light-green layer of copper salts.
• Zinc:
  • With acids, alkalis, and other non-metals, zinc interacts easily.
  • At normal temperatures, extremely pure zinc only moderately interacts with acids.
• Iron:
  • A particularly active metal is iron.
  • In humid air, it easily mixes with oxygen.
  • Rust is made of iron oxide, a byproduct of this process.
  • Hydrogen gas is also created when iron combines with extremely hot water and steam.​

The correct answer is Any of these.

Key Points

• Force is what causes a body or object's state of motion to change.
• The application of force on an object may change the speed, shape, and direction of motion of an object.
• An object can move or accelerate, slow down or decrease, and stop, or change direction as a result of force.
• An item may be pushed, pulled, or dragged by the force being exerted.
• An object's direction, shape, and speed can all be altered by a force operating on it.

Additional Information 

• It is a numerical description of an interaction that modifies the velocity of an item.  
• Any moving item needs a force component that is perpendicular to the direction of motion if it is to change direction.
• If force is applied in the direction of motion, just the speed will change.
• This change can be directly applied or indirectly.
• Rubber and deformable bodies are examples of objects that can change shape due to force.

The correct answer is Electrical energy into sound energy.

Key Points

• The loudspeaker is a device in which the electrical signals are processed and they are converted into sound signals.
• The part of the speaker that converts electrical into mechanical energy is frequently called the motor or voice coil.
  • The motor vibrates a diaphragm that in turn vibrates the air in immediate contact with it, producing a sound wave corresponding to the pattern of the original speech or music signal.

Additional Information

• A microphone converts sound into a small electrical current.
  • Sound waves hit a diaphragm that vibrates, moving a magnet near the coil and the coil creates an electrical signal by magnetic induction.
• Hitting a drum, playing a sitar etc are examples of the conversion of mechanical energy into sound energy.
• The sound waves enter the ear through the pinna and auditory canal and reach the tympanum or eardrum, where they are converted into mechanical vibrations.
  • This is an example of sound energy conversion into mechanical energy.

The correct answer is Megasthenes.

Key Points

• Megasthenes, an ambassador of a Greek king was in the court of Chandragupta Maurya who documented his life during that time in his book Indica.
• He described India in his book Indica, which is now lost but has been partially reconstructed from literary fragments found in later authors that quoted his work.

Additional Information

• Seleucus I Nicator was a Macedonian Greek general who was an officer and successor of Alexander the Great. Seleucus was the founder of the eponymous Seleucid Empire.
• Fa-Hien was a Chinese Buddhist monk and translator who traveled by foot from China to India to acquire Buddhist texts.Fa-Hien/ Faxian's visit to India occurred during the reign of Chandragupta II.
• Alexander the Great, was a king of the ancient Greek kingdom of Macedon. He succeeded his father Philip II to the throne in 336 BC at the age of 20 and spent most of his ruling years conducting a lengthy military campaign throughout Western Asia and Egypt.

​Thus, The author of the book Indica was  Megasthenes.

The correct answer is Karnataka.

In News

• Karnataka won Santosh trophy by defeating Meghalaya.

Key Points

• Karnataka won Santosh Trophy national football championship after 54-year wait.
• Karnataka won by beating Meghalaya 3-2.
• Final match was played at the King Fahd International Stadium in the Saudi Arabia capital.
• Total 120 matches were played in tournament.
• Services beat Punjab 2-0 in the playoff to finish third.
• The 2022–23 Santosh Trophy was the 76th edition of the Santosh Trophy.

The correct answer is four Feline species of big cat.

Key Points

• Namdapha National Park:
  • It is located in the State of Arunachal Pradesh
  • Namdapha is the name of a river originating in the park that later meets Noa-Dehing river.
  • The park has a sub-tropical climate.
  • It lies in close proximity to Indo-Myanmar-China trijunction.
  • The park is located between the Dapha bum range of the Mishmi Hills and the Patkai Bum range.
  • It was established as a national park in 1983, and was declared as a Tiger Reserve in the same year.
  • It is only park in the World to have the four Feline species of big cat namely the Tiger, Leopard, Snow Leopard and Clouded Leopard.
  • It is also famous for Critically Endangered species like the Namdapha flying squirrel.

The correct answer is 65 years.

Key Points

• The Chief Justice of the Supreme Court of India is joined by no more than 30 additional judges who have been chosen by the Indian President.
• Justices of the Supreme Court must retire by age 65.
• In the UK, judges must retire at the age of 75.
• In October 1963, the initial retirement age for High Court judges, which was set at 60 years, was increased to 62 years.

Additional Information

•  Supreme Court of India
  • The Supreme Court of India is the country's highest court.​ The Indian legal system's supreme court is also located there. The Chief Justice of India is one of the court's sanctioned 31 judges. However, the Indian Constitution only permits it to have a maximum of 34 judges. Its members are appointed by the Indian President and include both active and retired judges. The court has jurisdiction in original, appellate, and advisory matters.
  • The court has a wide range of authority, including the ability to enact writs, conduct judicial reviews, and invalidate legislation.
  • The Indian Constitution was shaped in large part by the Supreme Court, which still has a significant position in the legal system of the nation.
  • It is the final arbiter of the Indian Constitution. It settles disputes between the nation's various governments. The Supreme Court is essential in ensuring that the fundamental rights of Indian citizens be upheld.

​​The correct answer is Narendra Modi.

In News

• PM Narendra Modi on 22 March 2023 launched an app called 'Call Before u Dig’.

Key Points

• It will help prevent uncoordinated digging that results in damage to underground utility assets like optical fibre cables, costing the government thousands of crores every year.
• It has been developed by the department of telecommunications and the Bhaskaracharya Institute for Space Applications and Geoinformatics.
• The app will connect excavators and asset owners through SMS/Email notifications and click-to-call in bid to execute planned excavations.
• As per the government, its an adoption of a 'whole-of-government approach' in the ease of doing business as well the governance.
• Under the initiative, over 25,000 underground asset owner offices have been registered in the app till now.
• As per govt data, one million cable cuts happen yearly in the telecom sector alone.

The correct option is Bengaluru.

Key Points

• The headquarters of ISRO is situated in Bengaluru.
• The Secretariat of DOS and headquarters of ISRO are located at Antariksh Bhavan in Bangaluru.
• ISRO has become the 4th space agency to reach Mars after the United States, the Soviet Union, and the European Space Agency.

Additional Information

• ISRO:
  • Dr Vikram Sarabhai is considered as the founding father of the Indian space programme.
  • ISRO was formed on 15 August 1969.
  • S. Somanath is the current chairman of ISRO. (Dec 2022)
  • Its vision is to harness space technology for national development while pursuing space science research and planetary exploration.