Question Discussion & Solution

A mountain range is a group or chain of mountains that are near together and formed by orogenic forces.

Important Points

• The Aravalli Range (sometimes called Aravali) is a mountain range in Northern-Western India.
• It runs roughly 670 kilometers (430 miles) from Delhi to Gujarat, going through southern Haryana and Rajasthan.
• Guru Shikhar, at 1,722 meters, is the tallest summit (5,650 ft).
• The Aravalli Range, which dates back to the Proterozoic era, is considered the world's oldest fold mountain system.

Additional Information

• Vindhya and Satpura ranges run parallel to each other and separate peninsular India from the mainland. 
• The Himalayas protect the Indian subcontinent from the North East as a natural barrier providing geopolitical benefits to the country.
• Vindhya, Satpura, and Himalayas are all young-fold mountains.

Hence, Aravallis is the oldest folded mountain in India.

The correct answer is Viceroy Curzon.

Key Points

• Lord Curzon:
  • ​He served as Governor-General of India from 1899 to 1905.
  • He passed the Calcutta Corporation Act in the year 1899.
  • According to the act, it increased the number of official members and decreased the strength of elected official members.
  • As official members were mostly British Subjects it caused resentment in the Indian public.
  • He was the Viceroy who passed a law for protecting Ancient Indian monuments.
  • He passed the law in 1904 made the destruction of Ancient Monuments an offence and directed officials to collect and preserve ancient monuments.
  • British viceroy in India, Lord Curzon, carried out Partition of Bengal, (1905) despite strong Indian nationalist opposition.

Additional Information

• The Partition of Bengal was announced on 19 July 1905 by the then Viceroy Lord Curzon.
  • And was implemented on 16 October 1905
  • However, in 1911 it was withdrawn by Lord Hardinge.
• The stated reason was to ease the administration.
  • But the actual reason was to weaken the growing nationalism in Bengal and break the unity.
• As per Curzon, after the partition, the two provinces would be Bengal (including modern West Bengal, Odisha, and Bihar) and Eastern Bengal and Assam.
• Annulment of Bengal:
  • The partition of Bengal was annulled in 1911 by Lord Hardinge.
  • The capital of British India was moved to Delhi from Calcutta in 1911.
  • Despite the annulment, the partition already succeeded in making a communal divide between Muslims and Hindus of Bengal.

The correct answer is Harmeet Desai.

• Harmeet Desai won the men's singles title at the International Table Tennis Federation Challenge Indonesia Open 2019 Table Tennis Tournament.

Key Points

• The tournament was held in Batam, Indonesia. 
• He also won the Commonwealth championship in July 2019 held in Cuttack, Odisha. 
• He defeated Amalraj Anthony of India.

Additional Information

• Table Tennis:
  • The first match of The Table Tennis World Championship was played in 1927.
  • Table Tennis Association of India was formed in 1938.
  • Terminologies used in Table Tennis are Volley, Late service, Half volley, Backhand, Drive spin, Topspin, Chop, etc.
  • Swaythling Cup, Corbitton Cup, Barna-Bellack Cup, and Ramanujan Trophy are related to table tennis.

Explanation:

• Bronze is an alloy of copper and tin as the two main constituent elements.
• Bronze is a copper-based alloy that typically consists of approximately 88% copper and 12% tin.
• Some other elements added in minute quantities can be aluminium, nickel or zinc.
• It is one of the first alloys used by mankind and an entire era known as the 'Bronze Age' is known because of the extensive use of the alloy in many human artefacts.

Additional Information

Steel: 

• Stainless steel is an alloy of iron and chromium.
• Steel is an alloy of iron and carbon.
• Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon, and other alloying elements.

Solder:

• Soldering is a joining process used to join different types of metals together having different properties. 
• Solder is a metal alloy, usually made up of tin and lead which is melted using a hot iron (soldering iron).
• The iron is heated to temperatures above 600˚F which then cools to create a strong bond.
• Flux material used in soldering is ZnCl2 (Zinc Chloride) and NH4Cl (Ammonium Chloride).

Brass:

• Brass is a metal alloy that is made up of copper and zinc.
• The proportions of zinc and copper can vary to create different types of brasses with different properties.
• It has higher malleability than bronze or zinc and has a relatively low melting point (900 to 940 °C).

Mistake Points

• Copper was the first metal used by men.
• Copper was first used by man over 10,000 years ago.  
• Probably copper can be found as a naturally occurring native metal that is sometimes found in large lumps on the ground.
• People learned to make this into copper tools and other things, although, for a metal, it is quite soft.
• When it was melted over the fire, people learned how to make an alloy called bronze, which is much harder and stronger than copper.

The mirror image of this image is:

Hence, option (2) is the correct answer.