The question asks about the first landfall (onset) of the Southwest Monsoon in India. This is a fundamental concept in Indian geography and climatology. The Southwest Monsoon originates over the Indian Ocean and Arabian Sea and approaches the Indian subcontinent from the southwest. Its arrival is influenced by geographical location and atmospheric conditions.
Correct Option: B) Kerala is the state where the Southwest Monsoon typically makes its first landfall around June 1st. Its geographical position on the southwestern tip of the Indian peninsula and the presence of the Western Ghats make it the gateway for the monsoon into the Indian subcontinent.
The question asks about the main branches of the Southwest Monsoon upon reaching the southern tip of the Indian peninsula. This is a fundamental concept in Indian geography and climatology.
Correct Option: D) Arabian Sea branch and the Bay of Bengal branch. This option correctly identifies the two primary branches into which the Southwest Monsoon divides upon reaching the Indian peninsula.
The question asks about the characteristic rainfall pattern produced by the Arabian Sea branch of the Southwest Monsoon when it strikes the Western Ghats. This phenomenon is a classic example of orographic rainfall, where mountains play a crucial role in influencing precipitation distribution.
B) Heavy orographic rainfall on the windward (western) side, with a pronounced rain-shadow effect on the leeward (eastern) side. This accurately describes the rainfall distribution caused by the Arabian Sea branch of the Southwest Monsoon interacting with the Western Ghats.
The question asks to identify the location known for extremely heavy rainfall due to the Bay of Bengal branch of the Southwest Monsoon striking the Garo-Khasi-Jaintia hills. This requires knowledge of Indian geography, monsoon patterns, and specific locations known for high rainfall.
Correct Option: B) Mawsynram (and nearby Cherrapunji), Meghalaya is the correct answer. These locations are famous for receiving some of the highest annual rainfall in the world, primarily due to the unique topography of the Garo-Khasi-Jaintia hills interacting with the Bay of Bengal branch of the Southwest Monsoon.
The question asks about the geographical feature responsible for deflecting the Bay of Bengal branch of the monsoon westward along the Ganga plain, leading to a decrease in rainfall from east to west. This phenomenon is a key characteristic of the Indian monsoon system.
Correct Option: C) The Himalayas are responsible for deflecting the Bay of Bengal branch of the monsoon westward along the Ganga plain, causing rainfall to decrease from east to west.
The question asks why the Tamil Nadu coast remains relatively dry during the Southwest Monsoon. This phenomenon is primarily due to geographical factors and the direction of monsoon winds. We need to analyze how the Western Ghats and the orientation of the coast interact with the monsoon currents.
B) Both the Arabian Sea and Bay of Bengal monsoon currents blow parallel to this coast, creating a rain-shadow effect. This option correctly identifies the two main reasons: the rain-shadow effect caused by the Western Ghats for the Arabian Sea branch, and the parallel flow of the Bay of Bengal branch along the coast, which prevents significant rainfall.