Question Discussion & Solution

The correct answer is in 1957.

• Rajasthan State Sports Council was established in 1957.

Key Points

• Rajasthan State Sports Council is the premier body in Rajasthan at the State level which looks after the development of sports activities and providing coaching to the state players.
• It was set up in the year 1957.
• Its headquarters is in Jaipur, Rajasthan.
• Ashok Chandna is the current sports minister of Rajasthan.

The correct answer is Memory.

Key Points

• The memory mapping process is handled by the virtual memory manager, which is the same subsystem responsible for dealing with the page file.
• Memory-mapped files are loaded into memory one entire page at a time.
• The page size is selected by the operating system for maximum performance. 

Additional Information

• A memory
  • It is just like a human brain.
  • It is used to store data and instructions. 
  • Computer memory is the storage space in the computer, where data is to be processed and instructions required for processing are stored.
  • The memory is divided into a large number of small parts called cells.
• Process
  • It is the instance of a computer program that is being executed by one or many threads.
  • It contains the program code and its activity.
  • Depending on the operating system, a process may be made up of multiple threads of execution that execute instructions concurrently.
• A computer file
  • It is a computer resource for recording data in a computer storage device.
  • Just as words can be written to paper, so can data be written to a computer file.
  • Files can be edited and transferred through the Internet on that particular computer system.
• Computer security
  • cybersecurity or information technology security is the protection of computer systems and networks from information disclosure, theft of or damage to their hardware, software, or electronic data, as well as from the disruption or misdirection of the services they provide.

Explanation:

• The metallic property of the elements of the periodic table decreases when we move across the group whereas it increases when we go down the group, as we go down the number of electrons increases and thereby their distance from the nucleus increases. 
• This increase causes them to shed more electrons and thereby have a greater electropositive or metallic character. 

Among the given compounds Na shows maximum Metallic character. 

Bleaching powder:

• Calcium hypochlorite is known as bleaching powder.​
• It is a pale yellowish powder having a strong smell of chlorine.
• It is soluble in cold water.
• Bleaching powder reacts with dilute acids to produce chlorine.
• When bleaching powder is treated with an excess of a dilute, all the chlorine present in it is liberated.
• It is used in bleaching clothes in the laundry due to its oxidizing property.

Formula- CaOCl₂ 

Additional Information

• Washing powder: The chemical name of washing soda is Sodium carbonate Decahydrate and the chemical formulae is Na_2​CO3​.10H_2​O.
• Baking powder: Sodium hydrogen carbonate is the chemical term for the baking powder with chemical formulae NaHCO₃.
• Soda ash: Anhydrous Sodium carbonate is known as Soda ash with chemical formulae Na₂CO₃.

The correct answer is Ammeter. 

Key Points

• An ammeter is the instrument used to measures the electric current in a circuit.
• Electricity is the flow of free electrons.
• Unit of Current - Ampere.
• Father of  Electricity - Michael Faraday. 

Additional Information

Ohmmeter

• The instrument used to measure the electrical resistance.
• Electrical resistance opposes the flow of electric current in a circuit.
• Unit of Resistance - Ohm
• Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
• V=IR, where (R) Resistance is the proportionality constant.

Thermometer

• An instrument used to measure the temperature.
• The first Mercury Thermometer was invented by Gabriel Fahrenheit.

​Gyroscope

• The instrument used to measure or maintaining the orientation of angular velocity.
• Gyroscope was invented by Leon Foucault.