Question Discussion & Solution

The correct answer is Nichrome.

Key Points

• Nichrome 
  • It is a metal alloy made up of around 20 percent of chromium and 80 percent nickel.
  • The key to the workings of an electrical heating element is the role of the nichrome in it.
  • Nichrome has fast emerged as the leading alloy to be used in terms of electrical heating elements.
  • For an electric iron heater element should have higher resistance, high melting point, and high specific heat.
  • An element should have high resistance so that it can hold its configuration in a high voltage current. It should have a high melting point such that it can sustain high temperatures.
  • Nichrome is used as a heating element in electric iron which is an alloy consisting 80% of Nickel and 20% of Chromium melting point of this element is 1400 degrees Celsius with high resistance which makes this element best for use as a heating element. Hence, Option 1 is correct.
  • The reason which makes the Nichrome best for heating elements is when it is heated in the air it develops an outer layer of chromium oxide which makes it stable in air and this chromium layer helps the element from oxidizing further during heating. 

Additional Information

• Copper
  • It is a chemical element with the symbol Cu and atomic number 29.
  • It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.
  • A freshly exposed surface of pure copper has a pinkish-orange color.
• Silver
  • It is a chemical element with the symbol Ag and atomic number 47.
  • A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal.
• Lead
  • It is a chemical element with the symbol Pb and atomic number 82.
  • It is a heavy metal that is denser than most common materials.
  • Lead is soft and malleable, and also has a relatively low melting point.
  • When freshly cut, lead is silvery with a hint of blue it tarnishes to a dull gray color when exposed to air.

The correct answer is 37 °C.

Key Points

• The normal temperature of the human body is 37 °C.
• A temperature above 100.4 °F(38°C) most often means you have a fever caused by an infection or illness.
• Normal human body temperature is the prototypical temperature range found in humans.
• The normal human body temperature border is typically stated as 36.5–37 °C (97.7–98.6 °F).
• Human body temperature changes, it depends on gender, age, time of day, exertion level, health status, what part of the body the measurement is taken at, state of consciousness (waking, sleeping, sedated), and emotions.
• Body temperature is kept in the normal range by thermoregulation, in which adaptation of temperature is triggered by the central nervous system.

The correct answer is Chief Justice.

• Kamal Kant Verma was the first is the first Chief Justice of Rajasthan.

Key Points

• The Rajasthan High Court is the High Court of the state of Rajasthan.
• It was established on 29 August 1949 under the Rajasthan High Court Ordinance, 1949.
• The seat of the court is at Jodhpur. 
• There were five High Courts functioning in the various units of the States - at Jodhpur, Jaipur, and Bikaner, the High Courts of former Rajasthan and Matsya Union, before the unification of the Rajasthan.
• The High Court of Rajasthan was inaugurated by the Rajpramukh, Maharaja Sawai Man Singh on 29 August 1949, later on after the complete integration of Rajasthan in 1956 it was moved to Jodhpur with the recommendation of the Satyanarayan Rao committee.

Additional Information

• Maharaj Man Singh II  was the first Governor of Rajasthan.
• Heera Lal Shastri was the first Chief Minister of Rajasthan.
• Tika Ram Paliwal was the first Deputy Chief Minister of Rajasthan.
• https://rajassembly.nic.in/GovernorFormer.aspx
• 

The correct answer is In 2008.

• In 2008 Pratapgarh was declared the 33rd district of Rajasthan.

Key Points

• Pratapgarh district  
  • Pratapgarh district is the 33rd district of Rajasthan, created on 26 January 2008.
  • It is a part of the Udaipur Division.
  • It has been carved out from the erstwhile tehsils of Chittorgarh, Udaipur, and Banswara districts.

​Additional Information

• Geography of Pratapgarh district
  • ​It is situated at the junction of the Aravali mountain ranges and the Malwa Plateau.
  • The soil is mainly highly fertile Black Cotton Soil made of magma of volcanos.
  • The major rivers of the district are Jakham, Mahi, and Siwana or shiv.
  • Other seasonal rivers are Som, Era, and Karmoi. 

The correct answer is Uttar Pradesh.

• According to the 2011 census, Uttar Pradesh has the highest population growth rate.

Key Points

• A census is a procedure of systematically acquiring and recording information about the members of a given population. 
• This term is used mostly in connection with national population and housing census.
• The decennial Census of India has been conducted 15 times, as of 2011.
• First synchronised census in India took place in 1881.
• Since 1901, it has been taking place every decade.

Additional Information

• The 15th Indian Census was conducted in two phases, house listing and population enumeration.
• As per the home ministry notification dated March 28, 2019, declaring the government's intent to conduct Census 2021, the house listing phase was to take place from April 1 to September 30, 2020.
• Population enumeration was to be done from February 9 to 28, 2021.