SSC Geography Sample Paper NCERT Sample Paper-5

  • question_answer
    Orographic rainfall occurs

    A)  Along the Western Ghats

    B)  Along Aravalli Hills

    C)  Along Coromandel Coast

    D)  In Gujarat

    Correct Answer: A

    Solution :

    [a] Orographic rainfall occurs when warm and moist air is forced to rise across an orographic (landform) barrier, the as a high mountain range or a high hill range which lies across the path of the winds. When warm and moist air comes across an obstacle, it rises along the slope of the obstacle which leads to increase in relative humidity. The air becomes saturated. Condensation likes place, clouds are formed and rainfall occurs. This happens to the south-west monsoon when they reach the western coast of India and the Western Ghats put an obstacle in their way. They rise along the slopes of the Western Ghats and orographic rainfall occurs. The Aravalli Hills are not able to cause orographic rainfall because their direction is parallel to the-section of the monsoon winds and the Aravalli do not put any obstacle in the way of the monsoon winds. The Coromandel coast is also almost parallel to the south-west monsoons of the Bay of Bengal and do not cause any orographic rainfall. There are no mountains in Gujarat and the question of orographic rainfall does not arise at all.

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