NCERT Class 7 Geography — Chapter 1: Air

mcqeasy

Which of the following is NOT a permanent wind?

Official previous-year question

Verified 1 Aug 2026.

Options

AMonsoon
BEasterlies
CTrade Winds
DWesterlies

Did you get this right?

Solution

The correct option is

Monsoon

Explanation

Winds are broadly classified into three categories based on their periodicity and area of influence: Primary (Permanent or Planetary) winds, Secondary (Periodic or Seasonal) winds, and Tertiary (Local) winds. Permanent winds blow constantly throughout the year in a fixed direction over the globe.

Analysis of Options:

Westerlies: These are permanent winds blowing from the Sub-Tropical High-Pressure Belts towards the Sub-Polar Low-Pressure Belts in both hemispheres. They prevail throughout the year.
Easterlies: Also known as Polar Easterlies, these are permanent winds that blow from the Polar High-Pressure Belts towards the Sub-Polar Low-Pressure Belts.
Trade Winds Trade Winds: These are permanent winds blowing from the Sub-Tropical High-Pressure Belts towards the Equatorial Low-Pressure Belt. They are known for their consistency in force and direction.
Monsoon: Monsoons are classified as secondary or periodic winds. They are characterized by a complete seasonal reversal of wind direction (blowing from sea to land during summer and land to sea during winter). Therefore, they are not permanent winds.

Key Takeaway: The planetary wind system (Trade Winds, Westerlies, and Polar Easterlies) operates year-round, whereas Monsoons are seasonal winds driven by the differential heating of land and sea.

Your note

More from Chapter 1: Air

With reference to the composition of the atmosphere, consider the following statements: 1. Nitrogen is the most plentiful gas in the air. 2. Carbon dioxide and argon together make up the bulk of the atmosphere. 3. Helium and hydrogen are present in the atmosphere in lesser quantities than nitrogen. Which of the statements given above is/are correct?

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Which of the following gases is primarily responsible for the "greenhouse effect" by trapping the heat radiated from the earth?

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Consider the following statements regarding the circulation of air: 1. When air is heated, it contracts and becomes heavier. 2. Cold air is denser and tends to sink down. 3. Air circulation occurs when cold air from surrounding areas rushes to fill the gap left by rising hot air. Which of the statements given above is/are correct?

medium

With reference to the nitrogen cycle in the atmosphere, consider the following statements: 1. Plants absorb nitrogen directly from the air through their leaves. 2. Bacteria living in the soil and roots of some plants change the form of nitrogen for plant use. 3. Humans absorb all the nitrogen they inhale during breathing. Which of the statements given above is/are correct?

medium

Which one of the following best explains why the balance of carbon dioxide in the atmosphere is getting disturbed?

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Keep practising Chapter 1: Air

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The correct option is

Monsoon

Explanation

Analysis of Options:

Westerlies: These are permanent winds blowing from the Sub-Tropical High-Pressure Belts towards the Sub-Polar Low-Pressure Belts in both hemispheres. They prevail throughout the year.
Easterlies: Also known as Polar Easterlies, these are permanent winds that blow from the Polar High-Pressure Belts towards the Sub-Polar Low-Pressure Belts.
Trade Winds Trade Winds: These are permanent winds blowing from the Sub-Tropical High-Pressure Belts towards the Equatorial Low-Pressure Belt. They are known for their consistency in force and direction.
Monsoon: Monsoons are classified as secondary or periodic winds. They are characterized by a complete seasonal reversal of wind direction (blowing from sea to land during summer and land to sea during winter). Therefore, they are not permanent winds.