Question Discussion & Solution

The chemical substance present in bones and teeth is Calcium Phosphate or Ca₃(PO₄)₂.

• Calcium phosphate is fundamental to the formation of bone and teeth.
• It is essential for achieving optimal peak bone mass in the first 2–3 decades of life and for the maintenance of bone in later life.
• Bones:-
  • Bones are mostly made of collagen, a type of protein.
  • Calcium phosphate, a mineral, is the other main component of the bones.
  • Collagen gives the bones a soft framework, while calcium phosphate is what makes them hard and strong.
  • Bones are made of living tissues, so old bone tissue is broken down and removed, and then new tissue is created to replace the old.
• Teeth:-
  • Enamel – the hard, outer layer of your teeth – is made of minerals like calcium phosphate.
  • Enamel is harder than the bones. It's the hardest substance in the whole body.
  • However, unlike the bones, the teeth enamel doesn't contain any living tissues and so can't heal on its own.

Soil is one of the most important natural resources as mankind is dependent on soil for food. The soils of Rajasthan have developed under the arid and humid climate over the bedrocks of complex nature predominately through the process of Lateralization.

Classification: The old system of classification was developed by scientists (Thorpe & Smith) of the U.S Department of Agriculture in 1949. The classification is based upon differences in climate and mineralogy. As per this system, soils of Rajasthan can be classified into 8 types:

1. Desert Soils
2. Dunes and Associated Soils
3. Brown Soils
4. Sierozems
5. Red Loams
6. Hill Soils (Lithosols)
7. Saline Sodic Soils (Solonchaks)
8. Alluvial Soils/and Black Soils

Brown soil:

• Brown Soils Major area of these soils is in the catchment area of Banas River.
• Districts – Tonk, Bundi, Sawai Madhopur, Bhilwara, Udaipur, and Chittorgarh
• Annual Rainfall – 50 cm to 75 cm is sufficient for Kharif crops.
• Texture – Sandy loam to clay loam.
• Colour – Ranges from greyish brown to yellow-brown.
• They are rich in calcium salts but have poor organic matter
• The use of fertilizers becomes essential to get a good harvest
• As the groundwaters are saline, soils irrigate with these waters have accumulated salts
• Tank irrigated soils have also developed a problem of the high water table.
• Rabi crops are grown under irrigation.

Hence, option 1 is the correct answer.

The correct answer is Velocity, time, and acceleration.

The first equation of motion gives the relation between initial velocity, final velocity, acceleration, and time.

• First equation of motion is given as v = u + at
  • Where, v = final velocity
  • u = initial velocity
  • a = acceleration
  • t = time taken

• The first equation of motion gives the value of velocity acquired by the body at any particular point of time t.
• The second equation of motion is given as s = ut + ½at²
• It gives the value of distance (s) traveled by a body at a given time t.
• Third equation of motion is given as v² = u² + 2as
• This equation gives the velocity of the body in traveling the distance s.

The correct answer is MICR.

Key Points

•  MICR- Magnetic Ink Character Recognition
  • It is a technology used primarily to identify and process checks.
  • The MICR on a check is the string of characters that appears at the bottom left of the check.
  • It consists of three groups of numbers, including the bank routing number, the account number, and the check number.

Additional Information

•  OCR- Optical Character Recognition
  • It is a widespread technology to recognize text inside images, such as scanned documents and photos.
  • It is used to convert virtually any kind of image containing written text (typed, handwritten, or printed) into machine-readable text data.
• OMR- Optical Mark Recognition
  • It is the process of reading information that people mark on surveys, tests, and other paper documents.
• IFSC- Indian Financial System Code
  • It represents the 11 digit character on our bank’s cheque leaves, or other bank-sponsored material.
  • This 11 character code helps identify the individual bank branches that participate in the various online money transfer options like NEFT and RTGS.

The correct answer is Golden Gloves.

• The 'Golden Glove Award' is presented to the most outstanding goalkeeper at each FIFA World Cup finals.
• An award has been given to the best goalkeeper since the first World Cup in 1930. 

Additional Information

• The FIFA Women’s World Cup 2023 will be staged in Australia and New Zealand.
• It will also be the first to be hosted by Australia and New Zealand.