Question Discussion & Solution

Key PointsBiogas:

• Biogas is an emerging renewable, non-conventional energy source that is obtained through the degradation of organic matter by bacteria under anaerobic conditions.
• The major constituent of biogas is Methane.
• Biogas is usually made up of around 50-70% methane (CH4) and 25-45% carbon dioxide (CO2), with other gases such as hydrogen (H2), hydrogen sulphide (H2S), watervapour (H2O), Nitrogen (N2), oxygen (O2), ammonia (NH3) making up the rest.
• It is released when Cow, Buffalo, and Pig manure is processed anaerobically i.e. in the absence of Oxygen.
• Biogas can be used for Space Heating, Generation of Electricity, Fuel for Cooking, etc.

Important Points

Advantages of Biogas - 

• ​Biogas burns without smoke; hence no harmful gas such as CO₂, CO, NO₂, and SO₂ are evolved.
• The slurry produced after the production of biogas is used as manure in fields.
• The method of disposal is safe and efficient and hence no space is wasted in the form of landfills.
• Biogas plants require very little installation costs and become self-sufficient in a span of 3-4 months.
• Work opportunity for thousands of people is created, especially in rural areas.

Thus, Biogas is a non-conventional type of natural resource.

Additional Information

There are basically two sources of energy:

The correct answer is During 1982-83.

• Maharana Pratap Khel Award was instituted during 1982-83.

Key Points

• Maharana Pratap Khel Award:
  • The award is given by the State Sports Council for outstanding achievements at the National and International levels.
  • It was instituted in the year 1982-1983.
  • The awards consist of:
    • A Citation
    • Bronze Statue of Maharana Pratap

    • Cash prize of INR 1,00,000.

• Vashisth Puraskar is given to the outstanding Sports Coach of the state.
• Ashok Chandan is the current Sports Minister.

Additional Information

• Rajiv Gandhi Khel Ratna Award:
  • The Rajiv Gandhi Khel Ratna Award is India’s highest honour given for achievement in sports.
  • The award was instituted in the year 1991-92.
  • Vishwanathan Anand is the first winner of the award.

The correct answer is Barium.

Key Points

• Metal salts commonly used in firework displays include calcium chloride, sodium nitrate, barium chloride, copper chloride, etc.
• The green flame produced in fireworks is due to the presence of Barium.
• The blue flame is due to the presence of Copper.
• The orange flame is due to the presence of Calcium.
• A yellow flame is due to the presence of Sodium.
• Lithium is used to impart a red colour to fireworks.

Additional Information

• Barium (Ba):
  • The atomic number is 56.
  • It is mostly used in drilling fluids for oil and gas wells and also used in paints and glassmaking.
  • It is found in combination with other elements.
  • Barite is one of the major ores of Barium.
• Calcium (Ca):
  • The atomic number is 20.
  • Calcium provides strength to bones and teeth along with vitamins.
  • It also plays an important role in blood formation, muscle contraction, clotting of blood, etc.
  • Milk, eggs, fish, etc. are the main sources of calcium.
• Lithium (Li):
  • Atomic Number is 3.
  • Lithium is the lightest metal on the periodic table.
  • It is widely used in rechargeable batteries for mobile phones, laptops, digital cameras, etc.
• Chromium (Cr):
  • The atomic number is 24.
  • It is used in manufacturing stainless steel.
  • Chromite is the major ore of Chromium.
  • It is a blue-white hard, brittle, and very corrosion-resistant metal and is used to produce several alloys.

The correct answer is Palash.

• Palash tree is called the Flame of the Forest in Rajasthan.

Key Points

• Flame of the Forest, also known as Palash Tree is a very beautiful Indian tree with bright crimson orange-colored flowers.
  • Flame of the Forest/Palash Tree is such a tree when it is in its fullest beauty, it can change the view of the entire forest in a very graceful way.
  • From the month of January to March, the tree stands in all its glory with a lot of orange and vermilion flowers that cover the entire crown.
  • Palash trees are distinct as they have more flowers than leaves. This is the state flower of Madhya Pradesh as well as Jharkhand. 
  • Flame of the Forest/ Palash Tree is a medium-sized tree of around 6-12m in height.

Important Points

• Mahua:
  • ​Mahua flowers have many medicinal properties and are also used to make pickles, jams, and now ice creams as well.
• Khejri:
  • ​Khejri is one of the most common tree species found in India (in the dry regions of Rajasthan, Delhi, Gujarat, Punjab, and Madhya Pradesh), Afghanistan, Iran, and Pakistan.
  • It plays a vital role in preserving the ecosystem of arid and semi-arid areas, mainly in the Thar Desert.​

The correct answer is Ganga Singh.

Key Points

• Ganga Singh-
  • He was the younger brother of Dungar Singh.
  • He is known as Rajasthan's Bhagirath.
  • He took part in all three round table conferences.
  • He built Lalgarh palace in memory of his father Lal Singh.

Additional Information

• Rav Beeka-
  • He was the son of Rav Jodha.
  • Firstly, He established Kodamdesar as a capital.
  • He built the Bhairav temple in Kodamdesar.
  • He established Bikaner's Rathore dynasty.
  • He also established Bikaner city in 1488 AD.
  • He is also known as Jangaldhar Badshah. 
• Rai Singh-
  • He was the son of Rav Kalyanmal.
  • He went to Nagore Darbar in 1570 AD and became a member of the Royal army.
  • His daughter was married to Shajade Salim.
  • Akbar gave Rai title to him.
• Sardar Singh-
  • He was the only Rajasthani ruler who gave support to Britishers in 1857's revolt out of Rajasthan.
  • Britishers gave him 41 villages of Tibbi Pargana in reward for his service.
  • He was the first to prohibit Sati tradition in Bikaner.