Question Discussion & Solution

The correct answer is 10.

• In India, the census is done after a gap of 10 years.

Key Points

• In 1872 AD, the first Census was done in India under the rule of Lord Mayo.
• The First Official Census in India was done in 1881 AD under Lord Rippon.
  • It was called First synchronised census.
• Since 1901, it has been taking place every decade.
• Census 2011, is the 15th census and 7th after independence.
• The slogan of Census 2011 is “Our Census, Our Future”.
• India was the first country to adopt family planning in the world.

The correct answer is C.P.U.

Key Points

• CPU (Central Processing Unit)
  • It is the most important part of the computer as it performs the main function  of information processing.
  • It makes all the required calculations and processes data.
  • It is called the brain of the computer.​ 
• An input device sends information to a computer system for processing, and the device reproduces or displays the results of that processing as an output device. 
  • Input devices include Keyboard, Mouse, Scanner, Microphone, Digital Cameras, Barcode reader, Webcam, etc.
  • Output devices include printers, projectors, Plotters, monitors, Speakers, Head Phones, etc.
• Charles Babbage is considered the father of computers.

The correct answer is In 2004.

•  Darrah National Park was established in 2004.

Key Points

•  Darrah National Park ​
  • Mukundara Hills National Park is a national park in Rajasthan with an area of 759.99 km².
  • It was established in 2004 and consists of three wildlife sanctuaries: Darrah Wildlife Sanctuary, National Chambal Sanctuary, and Jawahar Sagar Wildlife Sanctuary.
  • It is located in the Kathiawar-Gir dry deciduous forests. 
  • 1955 – Darrah was declared a wildlife sanctuary.
  • 2004 – Declared as Mukundra Hills National Park.
  • 2013 – Got approval from NTCA & declared as Tiger Reserve.
  • 2020 – Moefcc notifies MHTR Eco-Sensitive Zone

​Additional Information

• About Rajasthan Wildlife
  • ​Rajasthan has Ranthambore National and Sariska National Park and Mukundara as a tiger reserve.
  • The UNESCO World Heritage Site Keoladeo National park along with Tal Chhapar, Van Vihar, and Jorbeed are for bird destinations in the state.
  • The Desert National Park is home to the critically endangered species of Great Indian Bustard.
  • Apart from these, Rajasthan is home to a large number of leopards, blackbuck, great Indian spotted eagle, and marsh crocodiles.

The correct answer is option 3 i.e. the Atomic Number

• The periodic table is based on Atomic Number.
• The atomic number is the number of protons found in the nucleus of every atom of that element. 
• The periodic table is managed by the International Union of Pure and Applied Chemistry, or IUPAC.
• In 1869, Dimitri Mendeleev included 63 known elements arranged according to increasing atomic weight. But there were many elements he could not place in the periodic table and with the discovery of new noble elements, there was a need to arrange the elements. Henry Moseley later arranged the elements in the periodic table by their number of protons rather than their atomic weights.
• The modern periodic table orders the elements according to increasing atomic number rather than increasing atomic weight.
• There are 118 elements in a periodic table. There are seven periods and eighteen groups in the modern periodic table.
• On moving from left to right in a period, the size of atoms(atomic size) decreases.
• On moving from left to right in a period, the metallic character of elements decreases, whereas the non-metallic character increases.
• While going down in a group of the periodic table, the size of atoms increases (or atomic size increases).
• While going down in a group of the periodic table, the metallic character of elements increases.
• Electronegativity and reactivity of non-metals increase along the period and decrease down the group.

The correct answer is Scanner.

Key Points

• Scanner:
  • Scanner is an input device and can be used to scan images as well as text documents.
  • Scanner is not a pointing input device.
• ​Pointing device
  • A pointing device is an input interface that allows a user to input spatial data to a computer. 
  • Common pointing devices
    • Mouse
    • Trackball
    • Joystick
    • Pointing stick
    • Wii Remote
    • Finger tracking
    • Graphics tablet
    • Stylus
    • Finger tracking

Additional Information

• Track Ball:
  • The trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axes, similar to an upside-down mouse..
  • Tracker balls are commonly used on CAD workstations​
• Digitizing Tablet:
  • A digitizer tablet is a peripheral device that allows users to draw on a computer screen.
• Joystick:
  • A joystick is a lever-type device that can be moved in several directions.
  • Used to control the movement of an image on a computer or similar display screen.