Question Discussion & Solution

The correct answer is Uttar Pradesh.

Key Points

• Uttar Pradesh
  • Uttar Pradesh is the most populous state in India, with 199,581,477 people as of 1 March 2011. Hence, Option 4 is correct.
  • The state contributes 16.16 percent of India's population
  • The population density is 828 people per square kilometer, making it one of the most densely populated states in the country
  • The sex ratio in 2011 was 908 women to 1000 men, lower than the national figure of 933
  • Estimates released by the Planning Commission for the year 2009-10 revealed that Uttar Pradesh had 59 million people below the poverty line, the most for any state in India
  • Hindi is the official language as well as the mother tongue of many in the state.
  • Urdu, additionally an official state language, is primarily spoken by Muslims.

Additional Information

• Largest State in India by Population

• S. No.	State Name	Population (As per Census 2011)
  1	Uttar Pradesh	199,812,341
  2	Maharashtra	112,374,333
  3	Bihar	104,099,452
  4	West Bengal	91,276,115
  5	Andhra Pradesh	84,580,777
  6	Madhya Pradesh	72,626,809
  7	Tamil Nadu	72,147,030
  8	Rajasthan	68,548,437
  9	Karnataka	61,095,297
  10	Gujarat	60,439,692

Map of India Population Density:

The correct answer is Kwashiorkor.

Key Points

• Kwashiorkor disease of caused by protein deficiency.
• Kwashiorkor, also known as “edematous malnutrition” because of its association with edema (fluid retention), is a nutritional disorder most often seen in regions experiencing famine.
• It is a form of malnutrition caused by a lack of protein in the diet. People who have kwashiorkor typically have an extremely emaciated appearance in all body parts except their ankles, feet, and belly, which swell with fluid.

Important Points

• Most people who are affected by kwashiorkor recover fully if they are treated early.
• Treatment involves introducing extra calories and protein into the diet. Children who develop kwashiorkor may not grow or develop properly and may remain stunted for the rest of their lives.
• There can be serious complications when treatment is delayed, including coma, shock, and permanent mental and physical disabilities. Kwashiorkor can be life-threatening if it’s left untreated.
• It can cause major organ failure and eventually death.

Additional Information

The correct answer is Copper and Tin.
Key Points

• Bronze
  • Bronze is an alloy traditionally composed of copper and tin.
  • Bronze is of exceptional historical interest and still finds wide applications.
  • It was made before 3000 BC, though its use in artifacts did not become common until much later.
  • The proportions of copper and tin varied widely (from 67 to 95 percent copper in surviving artifacts), but, by the Middle Ages in Europe, certain proportions were known to yield specific properties.
  • An alloy described in an 11th-century Greek manuscript in the library of St. Mark’s, Venice, cites a proportion of one pound copper to two ounces of tin (8 to 1), approximately that used for bronze gunmetal in later times.
  • Some modern bronzes contain no tin at all, substituting other metals such as aluminum, manganese, and even zinc.

Additional Information

• Copper and Silver
  • The best-known copper-silver alloy is sterling, which is 92.5 percent silver and 7.5 percent copper.
  • In England sterling, silver is traditionally identified by the hallmark of a lion passant.
  • Coin silver is an alloy of 90 percent silver and 10 percent copper.
  • For jewelry and ornaments, 85–90 percent silver (and the balance copper) is frequently used.
  • Dental alloys of 60–70 percent silver, 18–25 percent tin, 2–14 percent copper, and 0.5–2 percent zinc are amalgamated with varying quantities of mercury to form the filling materials for cavities in teeth.
• Copper and zinc
  • Brass is an alloy of copper and zinc, of historical and enduring importance because of its hardness and workability.
  • The earliest brass was called calamine brass, which dates to Neolithic times.
  • It was probably made by the reduction of mixtures of zinc ores and copper ores.
  • In ancient documents, such as the Bible, the term brass is often used to denote bronze, the alloy of copper with tin.
• Copper and Lead
  • Leaded bronzes contain from 4 to 25 percent lead plus additions of copper and tin, and some copper-lead bearing alloys contain up to 40 percent lead.
  • All these bearing alloys are sufficiently soft so that lubrication failure does not result in damage to the bearing.
  • Lead-based bearing alloys are also known as lead-based babbitt metals or white metals.
  • These are usually antimonial lead with widely variable additions of tin or copper (or both) and arsenic to increase strength.
  • One such alloy is commonly used for railroad-car journal bearings, contains 86 percent lead, 9 percent antimony, and 5 percent tin.
  • Many alloys of lead and alkaline-earth metals, such as calcium and sodium, also are widely used as bearing materials.

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All are divisible by 10 except 25.