DAY – 17 ( INSTA REVISION TEST – 17)INSTA REVISION PLAN 3.0, 2021

Solution: C

Standard Meridian of India which is 82°30′ East longitude passes through Uttar Pradesh, Madhya Pradesh, Chattisgarh, Odisha and Andhra Pradesh. Hence, statement 1 is incorrect.

Tropic of cancer and IST meridian intersect at Koriya district in Chhattisgarh. Hence, statement 2 is correct.

Official time signals are generated by the Time and Frequency Standards Laboratory at the National Physical Laboratory in New Delhi, for both commercial and official use. The signals are based on atomic clocks and are synchronised with the worldwide system of clocks that support the Coordinated Universal Time.  Hence, statement 3 is correct.

Solution: C

Western Ghats are locally known by different names such as Sahyadri in Maharashtra, Nilgiri hills in Karnataka and Tamil Nadu and Anaimalai hills and

Cardamom hills in Kerala. Western Ghats are comparatively higher in elevation and more continuous than the Eastern Ghats.

Eastern Ghats comprising the discontinuous and low hills are highly eroded

by the rivers such as the Mahanadi, the Godavari, the Krishna, the Kaveri, etc. Some of the important ranges include the Javadi hills, the Palconda range, the Nallamala hills, the Mahendragiri hills, etc. The Eastern and the

Western Ghats meet each other at the Nilgiri hills. Hence, both statement 1 and statement 2 are correct

Solution: B

The islands of the Arabian sea include Lakshadweep and Minicoy. These are scattered between 8°N-12°N and 71°E -74°E longitude. These islands are located at a distance of 280 km-480 km off the Kerala coast. The entire island group is built of coral deposits. There are approximately 36 islands of which 11 are inhabited. Minicoy is the largest island with an area of 453 sq. km. The entire group

of islands is broadly divided by the Eleventh degree channel, north of which is the Amini Island and to the south of the Canannore Island. Hence, statement 1 is incorrect.

Sri Lanka, formerly Ceylon, island country lying in theIndian Ocean and separated from peninsular India by the Palk Strait. Hence, statement 2 is correct.

Solution: D

The Tungabhadra River is a river in India that starts and flows through the state of Karnataka during most of its course, before flowing along the border between Telangana, Andhra Pradesh and ultimately joining the Krishna River.

The Koyna River is a tributary of the Krishna River which originates in Mahableshwar, Satara district, western Maharashtra, India.

Musi River is a tributary of the Krishna River in the Deccan Plateau flowing through Telangana state in India. Hyderabad stands on the banks of Musi river, which divides the historic old city and the new city.

Sabari River is one of the main tributaries of Godavari. It originates from the western slopes of Eastern Ghats in Odisha state from Sinkaram hill ranges at 1370 m MSL. It is also known as Kolab river in Odisha.

Hence, option (d) is correct.

Solution: C

When the rivers originate from a hill and flow in all directions, the drainage pattern is known as ‘radial’. The rivers originating from the Amarkantak range present a good example of it. Hence, statement 1 is correct.

An area drained by a river and its tributaries is called a drainage basin. The boundary line separating one drainage basin from the other is known as the watershed. Hence, statement 2 is correct.

Solution: D

Solution: A

Shipki La is a mountain pass and border post on the India-China border. The river Sutlej, which is called Langqên Zangbo in Tibet, enters India near this pass. The road is an offshoot of the ancient Silk Road.

Hence, option (a) is correct.

Niti Pass is an international high mountain pass at an elevation of 5.070m (16,633ft) connecting Uttarakhand, a state in the northern part of India and southern Tibet, an autonomous region of the People’s Republic of China.

Nathu La is a mountain pass in the Himalayas in East Sikkim district. It connects the Indian state of Sikkim with China’s Tibet Autonomous Region. The pass, at 4,310 m above mean sea level, forms a part of an offshoot of the ancient Silk Road.

Mana Pass is a mountain pass in the Uttarakhand Himalayas on the border between India and Tibet.

Solution: B

Tso Moriri is a lake in the Ladakhi part of the Changthang Plateau in Jammu and Kashmir in Northern India. The lake and surrounding area are protected as the Tso Moriri Wetland Conservation Reserve. It is a brackish water lake. Hence, statement 1 is incorrect.

Dal is a lake in Srinagar, the summer capital of Jammu and Kashmir, India. The urban lake, which is the second largest in the union territory, is integral to tourism and recreation in Kashmir . Hence, statement 2 is correct.

Atapaka Bird Sanctuary, located in Kolleru Lake on the borders of Krishna and West Godavari districts, has been identified as the largest spot-billed pelican home in the world. Hence, statement 3 is correct.

Solution: C

Khangchendzonga National Park also Kanchenjunga Biosphere Reserve is a National Park and a Biosphere reserve located in Sikkim, India. It was inscribed to the UNESCO World Heritage Sites list in July 2016, becoming the first “Mixed Heritage” site of India.

Neora Valley National Park is situated in the Kalimpong district, West Bengal, India and was established in 1986. It spreads over an area of 88 km² and is one of the richest biological zones in the entire Eastern India.

Namdapha National Park is a 1,985 km² large protected area in Arunachal Pradesh of Northeast India. With more than 1,000 floral and about 1,400 faunal species, it is a biodiversity hotspot in the Eastern Himalayas. The national park harbours the northernmost lowland evergreen rainforests in the world at 27°N latitude.

Singalila National Park is a national park of India located on the Singalila Ridge at an altitude of more than 7000 feet above sea level, in the Darjeeling district of West Bengal. It is well known for the trekking route to Sandakphu that runs through it.

Solution: A

Pt. Madan Mohan Malaviya:

• Madan Mohan Malaviya was a freedom fighter and social reformer.
• He had served as the President of the INC on four occasions.
• He was awarded the Bharat Ratna posthumously in 2014.
• He was the editor of a Hindi magazine, ‘Hindosthan’.
• He became the editor of the ‘Indian Opinion’ in 1889. He also started a Hindi weekly ‘Abhyudaya’, an English daily ‘Leader’, a Hindi newspaper ‘Maryada’.
• Pandit Malaviya was instrumental in founding the Benares Hindu University in 1916. He also became its Vice-Chancellor till 1939.
• He was opposed to separate electorates to Muslims and the Lucknow Pact.
• He was also against the INC’s participation in the Khilafat Movement.
• He was a participant in the Second Round Table Conference in 1931.
• He started the Ganga Mahasabha to oppose construction of dams in the Ganga.
• He was also a social reformer who opposed untouchability. He worked for the temple entry of Dalits at the Kalaram Temple at Nashik, Maharashtra.
• He also founded the organisation Shri Mathura Vrindavan Hasanand Gochar Bhoomi in Vrindavan.

Solution: D

Bibi Ka Maqbara:

• Bibi Ka Maqbara It is a tomb located in Aurangabad, Maharashtra.
• It was commissioned in 1660 by the Mughal emperor Aurangzeb in the memory of his first and chief wife Dilras Banu Begum.
• It is considered to be a symbol of Aurangzeb’s ‘conjugal fidelity’.
• The structure, known as the ‘Taj of the Deccan’ because of its striking resemblance to the Taj Mahal.

Solution: A

The Budapest Convention was the first ever treaty on cyber-crime that addressed internet and computer crimes. It was drawn by Council of Europe.  At present, it is the only treaty of cybercrime under the United Nations.

Countries like India and Brazil have not adopted the convention on the grounds that they did not participate in its drafting.

Solution: C

Quad Countries:

• The quadrilateral formation includes Japan, India, United States and Australia.
• All four nations find a common ground of being the democratic nations and common interests of unhindered maritime trade and security.
• The idea was first mooted by Japanese Prime Minister Shinzo Abe in 2007. However, the idea couldn’t move ahead with Australia pulling out of it.
• It was revived in 2017 and is being viewed as response to increased Chinese economic and military power.
• Quad is an opportunity for like-minded countries to share notes and collaborate on projects of mutual interest. Members share a vision of an open and free Indo-Pacific.

Solution: D

Dibang River, also known as Sikang in Adi and Talon in Idu, is a tributary river of the Brahmaputra that originates and flows through the Mishmi Hills and northeast India from the state of Arunachal Pradesh.

The Subansiri River is a tributary of the Brahmaputra River in the Indian states of Assam and Arunachal Pradesh, and the Tibet Autonomous Region of China. The Subansiri is the largest tributary of the Brahmaputra.

The Raidāk River, also called Wong Chhu in Bhutan, is a tributary of the River Brahmaputra, and a trans-boundary river. It flows through Bhutan, India and Bangladesh.

Hence, option (d) is correct.

Solution: B

 Narmada river is the fifth longest river in the Indian subcontinent and one of the major river that draining through the Gulf of Cambay into the Arabian Sea.

The Brahmani is a major seasonal river in the Odisha state of Eastern India. The Brahmani is formed by the confluence of the Sankh and South Koel rivers. It discharges into Bay of Bengal.

Mahi River originates in Madhya Pradesh and discharge into Arabian Sea by creating an wide estuary past Bay of Khambhat.

Sabarmati River originates in Dhebar lake near Udaipur in Aravalli hills of Rajasthan and meets the Arabian Sea at Gulf of Cambay. Ahmedabad and Gandhinagar city of Gujarat are situated on the banks of Sabarmati river.

Hence, option (b) is correct.

Solution: D

The Narmada and the Tapi are the only long rivers, which flow west and make estuaries. They do not form deltas.

Most of the major rivers of the Peninsula such as the Mahanadi, the Godavari, the Krishna and the Kaveri flow eastwards and drain into the Bay of Bengal. These rivers make deltas at their mouths.

Hence, option (d) is correct.

Solution: A

Solution: B

Solution: B

Solution: D

The Northeastern Plateau

In fact it is an extension of the main Peninsular plateau. It is believed that due to the force exerted by the northeastward movement of the Indian plate at the time of the Himalayan origin, a huge fault was created between the Rajmahal hills and the Meghalaya plateau. Later, this depression got filled up by the deposition activity of the numerous rivers.

Today, the Meghalaya and Karbi Anglong plateau stand detached from the main Peninsular Block. The Meghalaya plateau is further sub-divided into three: (i) The Garo Hills; (ii) The Khasi Hills; (iii) The Jaintia Hills, named after the tribal groups inhabiting this region. An extension of this is also seen in the Karbi Anglong hills of Assam. Similar to the Chotanagpur plateau, the Meghalaya plateau is also rich in mineral resources like coal, iron ore, sillimanite, limestone and uranium. This area receives maximum rainfall from the south west monsoon. As a result, the Meghalaya plateau has a highly eroded surface. Cherrapunji displays a bare rocky surface devoid of any permanent vegetation cover.

Solution: B

The outer-most range of the Himalayas is called the Shiwaliks. They extend over a width of 10-50 Km and have an altitude varying between 900 and 1100 metres. These ranges are composed of unconsolidated sediments brought down by rivers from the main Himalayan ranges located farther north. These valleys are covered with thick gravel and alluvium. The longitudinal valley lying between lesser Himalaya and the Shiwaliks are known as Duns. Dehra Dun,Kotli Dun and Patli Dun are some of thewell-known Duns.

Solution: C

The Coastal Plains

On the basis of the location and active geomorphological processes, it can be broadly divided into two: (i) the western coastal plains; (ii) the eastern coastal plains.

The western coastal plains are an example of submerged coastal plain. It is believed that the city of Dwaraka which was once a part of the Indian mainland situated along the west coast is submerged under water. Because of this submergence it is a narrow belt and provides natural conditions for the development of ports and harbours. Kandla, Mazagaon, JLN port Navha Sheva, Marmagao, Mangalore, Cochin, etc. are some of the important natural ports located along the west coast. Extending from the Gujarat coast in the north to the Kerala coast in the south, the western coast may be divided into following divisions – the Kachchh and Kathiawar coast in Gujarat, Konkan coast in Maharashtra, Goan coast and Malabar coast in Karnataka and Kerala respectively. The western coastal plains are narrow in the middle and get broader towards north and south. The rivers flowing through this coastal plain do not form any delta. The Malabar coast has got certain distinguishing features in the form of ‘Kayals’ (backwaters), which

are used for fishing, inland navigation and also due to its special attraction for tourists. Every year the famous Nehru Trophy Vallamkali(boat race) is held in Punnamada Kayal in Kerala.

As compared to the western coastal plain, the eastern coastal plain is broader and is an example of an emergent coast. There are well developed deltas here, formed by the rivers flowing eastward in to the Bay of Bengal. These include the deltas of the Mahanadi, the Godavari, the Krishna and the Kaveri. Because of its emergent nature, it has less number of ports and harbours. The continental shelf extends up to 500 km into the sea, which makes it difficult for the development of good ports and harbours.

Answer: C

A characteristic feature of the cold weather season over  the  northern  plains  is  the inflow of cyclonic disturbances from the west and the northwest. These low-pressure systems, originate over the Mediterranean Sea and western Asia and move into India, along with the westerly flow.

They cause the much-needed winter rains over the plains and snowfall in the mountains. Although the total amount of winter rainfall locally known as ‘mahawat’ is small, they are of immense importance for the cultivation of ‘rabi’ crops.

Solution: C

Why does Tamil Nadu coast remains dry during monsoon season. There are two factors responsible for it:

(i) The Tamil Nadu coast is situated parallel to the Bay of Bengal branch of southwest monsoon.

(ii) It lies in the rain shadow area of the Arabian Sea branch of the south-west monsoon.

Solution: B

Break in the Monsoon

During the south-west monsoon period after having rains for a few days, if rain fails to occur for one or more weeks, it is known as break in the monsoon. These dry spells are quite common during the rainy season. These breaks in the different regions are due to different reasons:

(i) In northern India rains are likely to fail if the rain-bearing storms are not very frequent along the monsoon trough or the ITCZ over this region.

(ii) Over the west coast the dry spells are associated with days when winds blow parallel to the coast.

Correct Answer : B
Answer Justification :
Time taken by one tap to fill half of the tank = 3 hrs.
Remaining part = (1-1/2) = ½
Part filled by the four taps in 1 hour =4*1/6 =2/3
2/3: 1/2:: 1: x
=> x = (1/2*1*3/2)=3/4 hrs = 45 minutes.
So, total time taken = 3 hrs + 45 mins

Correct Answer : B
Answer Justification :
Time taken by one tap to fill half of the tank = 3 hrs.
Remaining part = (1-1/2) = ½
Part filled by the four taps in 1 hour =4*1/6 =2/3
2/3: 1/2:: 1: x
=> x = (1/2*1*3/2)=3/4 hrs = 45 minutes.
So, total time taken = 3 hrs + 45 mins

Correct Answer : C
Answer Justification :
Work done by the waste pipe in 1 minute
=1/15-(1/20+1/24)=1/15-11/120
= -1/40 [- ve sign means emptying]
Volume of 1/40 part = 3 gallons
Volume of whole = (3 x 40) gallons = 120 gallons

Correct Answer : D
Answer Justification :
The logic is
30*1.5 , 45*2 , 90*2.5 , 225*3 , and so on
675*3.5 = 2362.5

Correct Answer : B
Answer Justification :
From the first and second clue we have
5 = colour.
Then from 256 and 254 we can see that 2 = chalk.
Hence from 254 we can conclude that 4 = white