The international date line, established in 1884, passes through the mid-Pacific Ocean and roughly follows a 180 degrees longitude north-south line on the Earth.
The Himalayas are young fold mountains formed mainly by the collision of the Indian Plate with the Eurasian Plate. Their continuing uplift reflects active plate convergence.
67. Which of the following mountain ranges in India are the oldest?
A
Himalayas
B
Vindhyas
C
Aravalli
D
Sahyadri
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The Aravalli Range is among the oldest surviving mountain systems on Earth, with rocks dating to the Precambrian era. It extends broadly across Rajasthan toward Haryana and Delhi; the Himalayas are geologically much younger.
The McMahon Line was drawn in the 1914 Simla Convention to define the boundary between Tibet and India's north-eastern frontier. India regards it as the basis of the eastern sector of the India–China boundary; China disputes it.
69. The exact time taken by the Earth for a single rotation on its own axis is:
A
24 hrs
B
24 hrs 30 min
C
23 hrs 54 min 7.8 sec
D
23 hrs 56 min 4.09 sec
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The Earth takes about 23 hours 56 minutes 4.09 seconds for one rotation relative to distant stars; this is the sidereal day. The approximately 24-hour solar day is longer because Earth also moves along its orbit.
70. Which state has the longest international border among the Seven Sisters?
A
Nagaland
B
Mizoram
C
Arunachal Pradesh
D
Assam
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Arunachal Pradesh has the longest international boundary among the Seven Sister states, bordering China, Bhutan and Myanmar. It also has the largest area among the Seven Sisters.
71. Which of the following sites is not located in India?
A
Harappa
B
Kalibanga
C
Rangpur
D
Ropar
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Harappa is in present-day Pakistan, in Punjab province. Kalibangan is in Rajasthan, Rangpur in Gujarat, and Ropar/Rupnagar in Punjab, India. Harappa is one of the type-sites of the Indus Civilization.
72. Which pass was opened between India and China for trade?
A
Nathu La
B
Khardung La
C
Chumbi
D
Solang
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Nathu La in Sikkim is an important India–China border pass and was reopened for designated border trade in 2006. It historically formed part of the Silk Route.
73. Which state's boundary does not touch Myanmar?
A
Manipur
B
Meghalaya
C
Arunachal Pradesh
D
Nagaland
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Meghalaya does not share a border with Myanmar. India's four states bordering Myanmar are Arunachal Pradesh, Nagaland, Manipur and Mizoram. Meghalaya instead borders Bangladesh.
74. Which North-East State has the lowest concentration of tribal population?
A
Meghalaya
B
Mizoram
C
Assam
D
Arunachal Pradesh
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Among the options, Assam has the lowest proportion of Scheduled Tribe population. This asks about percentage/concentration, not absolute tribal population.
75. The Fundamental Rights in our Constitution are inspired by the Constitution of:
A
United State of America
B
United Kingdom
C
Switzerland
D
Canada
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The Fundamental Rights were substantially influenced by the U.S. Constitution’s Bill of Rights. In India they are mainly contained in Part III, Articles 12–35.
An international agreement to reduce greenhouse gases.
B
An international agreement for extradition of foreign enemy
C
An international agreement describing formula for conversion of foreign exchange
D
An international agreement to deal with International Terrorists organization
Detailed Explanation
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The Kyoto Protocol was adopted in 1997 under the UNFCCC and entered into force in 2005, establishing binding emission targets mainly for developed countries.