The very high rainfall of the Khasi Hills is linked with which relief-atmospheric process?
Answer and explanation
Correct answer: Orographic lifting of moist monsoon winds
The governing concept is orographic, or relief, rainfall. Moisture-laden monsoon winds from the Bay of Bengal encounter the Khasi Hills and are forced to rise along the slopes. As air rises, it expands and cools; cooling causes water vapour to condense into clouds, often producing intense rainfall on the windward side. This process explains the very heavy precipitation around Cherrapunji and Mawsynram in Meghalaya. Therefore, option A is correct. Lava flow is a volcanic process, glacial deposition requires moving ice and is not the controlling process here, and sand storms are dry-weather events associated with loose sediment. None of these can explain the Khasi Hills’ monsoon rainfall as directly as orographic lifting.
Frequently asked questions
What is the correct answer to this question?
Orographic lifting of moist monsoon winds
Why is this the correct answer?
The governing concept is orographic, or relief, rainfall. Moisture-laden monsoon winds from the Bay of Bengal encounter the Khasi Hills and are forced to rise along the slopes. As air rises, it expands and cools; cooling causes water vapour to condense into clouds, often producing intense rainfall on the windward side. This process explains the very heavy precipitation around Cherrapunji and Mawsynram in Meghalaya. Therefore, option A is correct. Lava flow is a volcanic process, glacial deposition requires moving ice and is not the controlling process here, and sand storms are dry-weather events associated with loose sediment. None of these can explain the Khasi Hills’ monsoon rainfall as directly as orographic lifting.
Which subject and chapter does this question cover?
This is a Class 10 General Knowledge question. Chapter: Indian Geography. Topic: Mountains and Plateaus of India.
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