Question Discussion & Solution

CONCEPT:

Nuclear reactor:

• In a nuclear reactor, the energy is generated by a nuclear fission reaction.
• In a nuclear reactor, there is a concrete chamber and in this concrete chamber, there is a steel vessel. In this steel vessel, the nuclear fission reaction takes place.
• Fuel rods: Fuel rods are placed inside the steel chamber.
  • These rods are made of fissionable material. Generally, fuel rods are made of uranium-235, thorium, etc.
• Moderator: It is used to decrease the speed of fast-moving neutrons.
• Control rods: These rods are placed between the fuel rods. It is used to control the chain reaction. Control rods are generally made of cadmium.
  • The nuclear reactors are controlled by means of control rods which are made of a strongly neutron-absorbent material such as boron or cadmium (Cd).
• Coolant: It is used to absorb heat produced during the reaction.

EXPLANATION:

• Moderators are used to slow down the neutrons in order to carry out effective nuclear fission and also absorb neutrons. 
• The main reason why heavy water is used as the moderator is that it captures less number of neutrons compared to normal water Hence, option 2 is the answer. 

Given: Victory ∶ Encouragement ∶∶ Failure ∶ ?

Logic:

Victory leads to Encouragement.

Similarly,

Failure leads to Frustration.

Hence, frustration is the correct answer.

The correct answer is 100.

• 100 per cent share of the Central Government in the 'Sambhar wetland project' under the Twelfth Five Year Plan (2012 - 2017).

Additional Information 

• The objectives of the Twelfth Five-Year Plan were:
  • To create 50 million new work opportunities in the non-farm sector.
  • To remove gender and social gap in school enrolment.
  • To enhance access to higher education.
  • To reduce malnutrition among children aged 0–3 years.
  • To provide electricity to all villages.
  • To ensure that 50% of the rural population has access to proper drinking water.
  • To increase green cover by 1 million hectares every year.
  • To provide access to banking services to 90% of households.

The pattern is:

31

31 × 2 + 1 = 63;

63 × 2 - 2 = 124;

124 × 2 + 3 = 251;

251 × 2 - 4 = 498

Hence, the answer is '498'.

The correct answer is Ajmer.

Key Points

• The headquarter of the Rajasthan Revenue Council is located in Ajmer.
• Functions of Revenue Department:
  • All matters relating to levy and collection of Direct Taxes.
  • All matters relating to levy and collection of Indirect Taxes.
  • Investigation into economic offenses and enforcement of economic laws.
  • Levy of taxes on sales in the course of inter-state trade or commerce.

Additional Information

• Bikaner:
  • Bikaner city is the district headquarters which was founded in 1486 AD by Rao Bika, a Rajput ruler, and is the fourth largest city of the State. 
• Jaipur:
  • It is the capital of India’s Rajasthan state.
  • It evokes the royal family that once ruled the region and that, in 1727, founded what is now called the Old City, or “Pink City” for its trademark building color. ​
• Jodhpur:
  • It is a city in the Thar Desert of the northwest Indian state of Rajasthan.
  • Its 15th-century Mehrangarh Fort is a former palace that’s now a museum, displaying weapons, paintings, and elaborate royal palanquins. 
• Ajmer:
  • Ajmer is a city in the northern Indian state of Rajasthan.
  • It is situated on the lower slopes of the Taragarh Hill of that range. 
  • South of the city's artificial Ana Sagar Lake is Ajmer Sharif Dargah, the domed shrine of the Muslim Sufi saint Garib Nawaz.