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Drainage System

CBSE · Class 11 · Geography

NCERT Solutions for Drainage System — CBSE Class 11 Geography.

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EXERCISES

1(i)Which one of the following rivers was known as the 'Sorrow of Bengal'?Show solution
The river known as the 'Sorrow of Bengal' is the Damodar. The chapter states this directly.

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1(ii)Which one of the following rivers has the largest river basin in India?Show solution
The chapter says the Ganga is the largest river system in India and has the largest river basin in India. So the correct answer is the Ganga.

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1(iii)Which one of the following rivers is not included in 'Panchnad'?Show solution
Panjnad means the five rivers of Punjab: Satluj, Beas, Ravi, Chenab and Jhelum. The Indus is not one of them.

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1(iv)Which one of the following rivers flows in a rift valley?Show solution
The chapter says the Narmada flows through a rift valley between the Satpura and Vindhyan ranges.

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1(v)Which one of the following is the place of confluence of the Alaknanda and the Bhagirathi?Show solution
The chapter states that at Devprayag, the Bhagirathi meets the Alaknanda. So the place of confluence is Deva Prayag.

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2(i)River Basin and WatershedShow solution
A river basin is the area drained by a river and its tributaries. It is usually large in extent. A watershed is the boundary line separating one drainage basin from another, and the term is also used for a small drainage area. Thus, basins are larger areas, while watersheds are smaller in area.

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2(ii)Dendritic and Trellis drainage patternShow solution
Dendritic drainage pattern looks like the branches of a tree; it is common in the rivers of the Northern Plains. Trellis drainage pattern has primary tributaries flowing parallel to each other, and secondary tributaries joining at right angles. So, dendritic is tree-like, while trellis is like a ladder or grid.

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2(iii)Radial and Centripetal drainage pattern
2(iv)Delta and Estuary
3(i)What are the socio-economic advantages of inter-linking of rivers in India?
3(ii)Write three characteristics of the Peninsular river.
4(i)What are the important characteristic features of north Indian rivers? How are these different from Peninsular rivers?
4(ii)Suppose you are travelling from Haridwar to Siliguri along the foothills of the Himalayas. Name the important rivers you will come across. Describe the characteristics of any one of them.

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Frequently Asked Questions

What are the important topics in Drainage System for CBSE Class 11 Geography?
Drainage System covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Drainage System — CBSE Class 11 Geography?
Understand the core concepts first, then work through the 79 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
Where can I get free NCERT Solutions for Drainage System Class 11 Geography?
This page has free step-by-step NCERT Solutions for every exercise question in Drainage System (CBSE Class 11 Geography) — written the way examiners award marks: given, formula, working, answer.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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