Question Discussion & Solution

The correct answer is Twelve.

• Twelve members are nominated by the President in Rajya Sabha.

Key Points

• Rajya Sabha [Article 80]:
  • Rajya Sabha is a permanent body and not subject to dissolution. Its maximum strength is 250. The total membership of the present Rajya Sabha is 245 however one-third members retire every second
    year.
  • Their seats are filled up by fresh elections and a presidential nomination at the beginning of every third year.
  • There are no seats reserved for SCs and STs in Rajya Sabha.
  • Representation of People Act (1951) provided the term of office of a member of the Rajya Sabha shall be six years. 
  • In the Rajya Sabha, 12 members are nominated by the President from persons having special knowledge or practical experience of literature, science, art and social service.
  • The President is empowered to nominate not more than two Anglo Indian members to the Lok Sabha if that community is not adequately represented in that House.

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 Magnetic Force.

• Magnetic resonance imaging ( MRI) is one of the most popular medical imaging methods used in the world at many diagnostic centers.
• These MRI scanners use strong magnetic fields, gradients of the magnetic field, and radio waves to produce images of the organs inside the body.
• The magnetic force is a component of the electromagnetic force, one of nature's four basic forces, which is induced by charge movement.
• There would be a magnetic force of attraction between two objects containing charge in the same direction of motion, while objects in charge traveling in opposite directions have between them a repulsive force.

The correct answer is Vitamin C.

Important Points

• Scurvy is a nutritional disorder of humankind.
  • Scurvy is caused by the deficiency of Vitamin C
  • Ascorbic acid is the chemical name of vitamin C.
  • Vitamin C is the first artificially synthesized vitamin.
  • Vitamin C is essential for the healing of wounds, repair, and maintenance of cartilage, bone, and teeth.
  • Vitamin C deteriorated through cooking and canning of food.

Additional Information 

• Xerophthalmia and night blindness are the deficiency diseases of Vitamin A.
• Rickets is the deficiency diseases of Vitamin D.
• Hemorrhage is the deficiency diseases of Vitamin K.

The correct answer is ​Ahar.

• Ahar civilization:
  • Ancient name
    • Tamravati Nagari
    • Aghatpur
    • Aghat Pur
  • Upnaam
    • Banas culture
    • Mounds of the dead

Key Points

• Ahar civilization-
  • It is situated in Udaipur.
  • It was excavated by-
    • Akshay Kirti Vyas in 1953 AD.
    • Ratan Chand Agrawal in 1956 AD.
    • Dheeraj Lal Sankaliya in 1961 AD.
  • It was known as Tamravati / Aghatpur / Dhulkot in ancient times.
  • It is also known as mounds of dead.
  • Ahar's houses were built with soft black stone and raw briquette.
  • One/ two/ six stoves were also found in Ahar's houses.
  • Red black ware also found there.
  • It was a copper-age civilization.
  • Agriculture and animal rearing were also done by Aharvasi.
  • Soil-made ox statue was also found there, which is known as the Banasiyal bull.

Additional Information

• Bairath civilization-
  • It is situated in Shahpura, Jaipur.
  • It is also known as Virat Nagar.
  • It is situated on the bank of the Banganga river.
  • It was firstly searched by Rai Bahadur Dayaram Sahani in 1936 AD.
  • Its survey and excavation were done by Kailash Dixit and Neel Ratna Banarjee. 
• Bagore civilization- 
  • It is situated in Bhilwara on the bank of the Kothari river.
  • It was excavated by Dr. V.N. Misra and Dr. L.S. Laishnik.
  • It has evidence of the most ancient animal rearing of India.
  • It is also known as the museum of primitive culture.
  • Swastik sign was used there for Vastu dosh prevention.
• Kalibanga civilization-
  • It was excavated by Amlanand Ghosh (firstly) in 1952 AD.
  • It was also excavated by Brijvasi Lal and Balkrishna Thapar in 1961-69 AD.
  • It is situated on the bank of the Ghaggar river.