Drainage
Bihar Board · Class 9 · Social Science
Most important questions from Drainage for Bihar Board Class 9 Social Science board exam 2026. MCQs, short answer, and long answer questions with marks.
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Which of the following are characteristics of Himalayan rivers?
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They are perennial, They receive water from rain and melted snow, They have long courses
Himalayan rivers are perennial (flowing throughout the year), receive water from both rainfall and melted snow from mountains, and have long courses from source to sea. Peninsular rivers are seasonal and have shorter courses.
The Brahmaputra river is known by different names in different regions.
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True
True. The Brahmaputra is known as Tsang Po in Tibet, Dihang when it enters India, Brahmaputra in Assam, and Jamuna in Bangladesh.
Which of the following rivers flow westward and drain into the Arabian Sea?
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Narmada, Tapi, Sabarmati
Among the major peninsular rivers, only Narmada and Tapi flow westward into the Arabian Sea. Sabarmati is also a west-flowing river. Most other peninsular rivers like Godavari and Krishna flow eastward into the Bay of Bengal.
The Sundarban Delta is formed by which rivers?
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Ganga and Brahmaputra
The Sundarban Delta is formed by the rivers Ganga and Brahmaputra. It is the world's largest and fastest growing delta and is home to the Royal Bengal tiger.
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