CBSE Class 11 Geography Chapter 4 Climate NCERT Solutions

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NCERT Solutions PDF Class 11 PDF

This chapter delves into the intricacies of India's climate, providing detailed NCERT Solutions for Class 11 Geography. It covers the fundamental factors influencing weather patterns, such as air pressure, wind circulation, and the role of jet streams and western disturbances. The solutions explain the concept of the Inter-Tropical Convergence Zone (ITCZ) and the phenomenon of 'bursting of the monsoon,' highlighting Mawsynram as the place receiving the highest rainfall. It also touches upon Koeppen's classification of climates and the types of cyclones affecting India. These solutions are designed to help students grasp complex meteorological concepts and prepare effectively for their examinations by offering clear explanations and accurate answers to all questions.

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BoardCBSE
ClassClass 11
SubjectGeography
Session2026
LanguageEnglish
TypeNCERT Solutions
Chapter4. Climate

Chapter summary

Chapter 4, 'Climate,' provides an in-depth look at the climatic conditions in India. The NCERT Solutions cover the factors influencing Indian weather, the Inter-Tropical Convergence Zone (ITCZ), the bursting of monsoons, and the highest rainfall locations. It also introduces Koeppen's climate classification and the role of different cyclones in causing rainfall. These solutions offer clear explanations for understanding the diverse climatic phenomena across India.

Learning outcomes

  • Understand the factors influencing India's weather mechanisms.
  • Define and explain the Inter-Tropical Convergence Zone (ITCZ).
  • Describe the phenomenon of the 'bursting of the monsoon'.
  • Identify regions with specific climate types based on Koeppen's classification.
  • Explain the causes of rainfall in different parts of India during various seasons.
  • Recognize the impact of western disturbances and tropical depressions on Indian weather.

Topics covered

Paper topics

  • Factors Influencing Indian Weather
  • Distribution of Air Pressure and Winds
  • Upper Air Circulation
  • Jet Streams
  • Western Disturbances
  • Tropical Depressions
  • Inter-Tropical Convergence Zone (ITCZ)
  • Monsoon Mechanism
  • Bursting of Monsoon
  • Highest Rainfall Areas in India
  • Koeppen's Climate Classification
  • Cyclones and Rainfall

Important topics

  • Factors Influencing Indian Weather
  • Inter-Tropical Convergence Zone (ITCZ)
  • Bursting of Monsoon
  • Koeppen's Climate Classification
  • Role of Western Disturbances and Tropical Depressions

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Questions and Solutions

Question 1 (i)

Choose the right answer from the four alternatives given below: What causes rainfall on the coastal areas of Tamil Nadu in the beginning of winters?

(a) South-West monsoon

(b) Temperate cyclones

(c) North-Eastern monsoon

(d) Local air circulation

Solution: The correct option is (c) North-Eastern monsoon. During the winter season, the winds blow from the land towards the sea. These winds, known as the North-Eastern monsoon, pick up moisture from the Bay of Bengal and cause rainfall along the coast of Tamil Nadu.

Question 1 (ii)

Choose the right answer from the four alternatives given below: What is the proportion of area of India which receives annual rainfall less than 75 cm?

(a) Half

(b) One-third

(c) Two-third

(d) Three-fourth

Solution: The correct option is (b) One-third. Approximately one-third of the total area of India receives an annual rainfall of less than 75 cm. This region primarily includes the arid and semi-arid parts of the country, such as parts of Rajasthan, Gujarat, and the rain shadow areas of the Western Ghats.

Question 1 (iii)

Choose the right answer from the four alternatives given below: Which one of the following is not a fact regarding South India?

(a) Diurnal range of temperature is less here.

(b) Annual range of temperature is less here.

(c) Temperatures here are high throughout the year.

(d) Extreme climatic conditions are found here.

Solution: The correct option is (d) Extreme climatic conditions are found here. South India, being closer to the equator and surrounded by the sea, experiences a moderated climate. The diurnal (daily) and annual ranges of temperature are relatively small, and temperatures remain high throughout the year, preventing extreme conditions.

Question 1 (iv)

Choose the right answer from the four alternatives given below: Which one of the following phenomenon happens when the sun shines vertically over the Tropic of Capricorn in the southern hemisphere?

(a) High pressure develops over North-western India due to low temperatures.

(b) Low pressure develops over North-western India due to high temperatures.

(c) No changes in temperature and pressure occur in north-western India.

(d) 'Loo' blows in the North-western India.

Solution: The correct option is (a) High pressure develops over North-western India due to low temperatures. When the sun is vertically overhead the Tropic of Capricorn (around December 22nd), it is winter in the Northern Hemisphere. This results in low temperatures and consequently, a high-pressure system develops over the northwestern parts of India.

Question 2 (i)

In which of the following states in India do we find 'As' type of climate as per Koeppen's classification?

1. In Kerala and coastal Karnataka

2. In Andaman and Nicobar Islands

3. On Coromandel Coast

4. In Assam and Arunachal Pradesh

Solution: The correct option is 3. On Coromandel Coast. The 'As' type of climate, according to Koeppen's classification, represents a tropical savanna climate with a dry summer. This type of climate is found along the Coromandel Coast, particularly in the region around Chennai, which experiences its main rainfall during the retreating monsoon season (October-November).

Question 2 (ii)

What are the three important factors which influence the mechanism of Indian weather?
Solution: The three most significant factors influencing the mechanism of Indian weather are:
  1. Distribution of air pressure and winds on the surface of the earth: This includes seasonal pressure variations and the direction of prevailing winds, which are crucial for understanding monsoon patterns.
  2. Upper air circulation: This involves the flow of air at higher altitudes, including the influence of jet streams and the inflow of different air masses, which significantly impact weather systems.
  3. Inflow of western disturbances and tropical depressions: Western disturbances bring winter rain to northwestern India, while tropical depressions cause heavy rainfall during the southwest monsoon period, contributing to the overall weather conditions.

Question 2 (iii)

What is the Inter-Tropical Convergence Zone?
Solution: The Inter-Tropical Convergence Zone (ITCZ) is a broad, low-pressure trough located near the equator. It is characterized by the convergence of the northeast and southeast trade winds. In this zone, the warm, moist air tends to ascend, leading to cloud formation and precipitation, and it shifts north and south with the apparent movement of the sun.

Question 2 (iv)

What is meant by 'bursting of monsoon'? Name the place of India which gets the highest rainfall.
Solution: The 'bursting of monsoon' refers to the sudden and abrupt onset of heavy rainfall during the southwest monsoon season. It is characterized by a significant increase in the mean daily rainfall across India. The place in India that receives the highest rainfall is Mawsynram, located in the Khasi Hills of Meghalaya.

Question 2 (v)

Define 'climatic region'. What are the bases of Koeppen's classification?
Solution: A 'climatic region' is an area that exhibits a broad uniformity in its climatic conditions, resulting from the combined effect of various climatic factors like temperature, precipitation, and wind patterns. Koeppen's classification of climates is based on the monthly values of temperature and precipitation, using specific symbols to denote different climate types.

Question 2 (vi)

Which type(s) of cyclones cause rainfall in north-western India during winter? Where do they originate?
Solution: Rainfall in north-western India during winter is primarily caused by 'western disturbances'. These are extra-tropical cyclones that originate over the Mediterranean Sea, the Atlantic Ocean, and sometimes the Pacific Ocean. They move eastwards and bring light to moderate rainfall to the plains and snowfall to the mountains of northwestern India.

Common mistakes

  • Confusing the causes of rainfall during different monsoon seasons.
  • Misinterpreting Koeppen's climate classification criteria.
  • Incorrectly identifying the origin or impact of cyclones.
  • Not clearly distinguishing between diurnal and annual temperature ranges.

Revision tips

  • Focus on understanding the seasonal variations in India's climate.
  • Memorize the key factors that drive the monsoon mechanism.
  • Relate Koeppen's classification to specific regions of India discussed.
  • Use maps to visualize the areas receiving high and low rainfall.
  • Review the definitions of key terms like ITCZ and 'bursting of monsoon'.

Practice MCQs

Q1. Which monsoon is responsible for rainfall in the coastal areas of Tamil Nadu at the beginning of winter?

Q2. What proportion of India's area receives less than 75 cm of annual rainfall?

Q3. Which of the following statements is NOT true about South India's climate?

Q4. When the sun is directly over the Tropic of Capricorn, what happens in North-western India?

Q5. According to Koeppen's classification, which region in India has an 'As' type of climate?

Q6. What is the Inter-Tropical Convergence Zone (ITCZ)?

Q7. Which phenomenon signifies a sudden increase in rainfall during the monsoon season?

Frequently asked questions

What are the main factors that influence the weather mechanism in India?

The three main factors are the distribution of air pressure and winds on the Earth's surface, upper air circulation influenced by global weather patterns and jet streams, and the inflow of western disturbances and tropical depressions.

What is the Inter-Tropical Convergence Zone (ITCZ)?

The ITCZ is a low-pressure zone located near the equator where the trade winds from both hemispheres converge, causing the air to rise.

What does 'bursting of monsoon' mean?

It refers to the sudden and abrupt onset of heavy rainfall during the southwest monsoon season, marking a significant change in weather conditions.

Which place in India receives the highest rainfall?

Mawsynram, located in Meghalaya, receives the highest rainfall in the world.

On what basis is Koeppen's climate classification made?

Koeppen's classification is based on the monthly average values of temperature and precipitation.

What causes rainfall in north-western India during winter?

Rainfall in north-western India during winter is caused by western disturbances, which are extra-tropical cyclones originating in the Mediterranean region.

How do these NCERT Solutions help Class 11 Geography students?

These solutions provide clear, step-by-step answers to all questions in Chapter 4, helping students understand complex concepts like monsoon mechanisms and climate classification for effective exam revision.

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