Practice questions without fighting the page.

<div class="ai-exp-block"> <b>Explanation:</b> <p>Coral atolls are ring-shaped islands formed by coral reefs growing around a volcanic island, which then subsides, leaving a circular reef with a central lagoon. Lakshadweep Islands are a group of coral atolls in the Arabian Sea, hence they are associated with coral atolls. Other options are not primarily formed as coral atolls: Nicobar is a group of islands with diverse geology, Sundarbans are deltaic islands formed by sediment deposition, and Wheeler and Shorts Island is not a standard name for a coral-atoll group.</p> </div> <div class="ai-did-block"> <b>? Did You Know?</b><br> <p>Lakshadweep means “one hundred thousand islands” in Malayalam.</p> </div> <div class="ai-remember-block"> <b>? Remember:</b> <p>Coral atolls form from reef-building corals around sinking or aging islands; Lakshadweep is a classic example.</p> </div>

A "doab" is a term used in the Indian subcontinent to describe a fertile, low-lying land area lying between two rivers. The word "doab" is derived from the Persian language, with "do" meaning "two" and "ab" meaning "water" or "river."

<div class="ai-exp-block"> <b>Explanation:</b> <p>The Ganga river system receives tributaries like the Son and Gandak. Gomati is a river in the northeast that is a tributary of the Brahmaputra–a separate basin, not the Ganga. Subarnarekha drains into the Bay of Bengal and is not a tributary of the Ganga either. So the only option that is not a Ganga tributary among the choices is Subarnarekha.</p> </div> <div class="ai-did-block"> <b>? Did You Know?</b><br> <p>Subarnarekha means "golden line" in Sanskrit/Bengali, reflecting its golden-colored sands along parts of its course.</p> </div> <div class="ai-remember-block"> <b>? Remember:</b> <p>Not all rivers in eastern India feed the Ganga; Subarnarekha does not join the Ganga basin.</p> </div>

<div class="ai-exp-block"> <b>Explanation:</b> <p>The correct latitude is the Tropic of Cancer (around 23.5° N). It passes through the northern part of India, defining the tropical boundary for the sun’s vertical rays during the solstice. The Equator is 0° and runs through other continents; the Arctic Circle lies far north of India; the Tropic of Capricorn is in the southern hemisphere and does not pass through India. Understanding these latitudes helps explain the climate and daylight variation across different parts of the country.</p> </div> <div class="ai-did-block"> <b>? Did You Know?</b><br> <p>The Tropic of Cancer is located at approximately 23.5° N latitude.</p> </div> <div class="ai-remember-block"> <b>? Remember:</b> <p>India lies between the Tropic of Cancer (north) and the Tropic of Capricorn (south); Tropic of Cancer passes through India.</p> </div>

<div class="ai-exp-block"> <b>Explanation:</b> <p>All four are UNESCO World Heritage Sites for their remarkable natural heritage. Keoladeo National Park in Rajasthan is a WHS for its avifauna and wetlands. Manas National Park in Assam is recognized for its biodiversity and landscape. Nanda Devi Biosphere Reserve is part of the WHS titled Nanda Devi and Valley of Flowers National Parks. Great Himalayan National Park in Himachal Pradesh is also a WHS for its pristine Himalayan ecosystems. Hence, options (i), (ii), (iii) and (iv) are correct.</p> </div> <div class="ai-did-block"> <b>? Did You Know?</b><br> <p>Keoladeo National Park was designated a World Heritage Site in 1985.</p> </div> <div class="ai-remember-block"> <b>? Remember:</b> <p>All four parks—Keoladeo, Manas, Nanda Devi–Valley of Flowers, and Great Himalayan National Park—are UNESCO World Heritage Sites.</p> </div>

<div class="ai-exp-block"> <b>Explanation:</b> <p>The correct answer is Durgapur. Durgapur Steel Plant was established with British collaboration to develop steel production in the eastern region. Bhilai was built with Soviet/Indian collaboration, Rourkela with German assistance, and Bokaro with American/Soviet involvement. The plant at Durgapur became a key milestone in expanding India’s integrated steel industry under external cooperation.</p> </div> <div class="ai-did-block"> <b>? Did You Know?</b><br> <p>Durgapur is located in the Paschim Bardhaman district of West Bengal.</p> </div> <div class="ai-remember-block"> <b>? Remember:</b> <p>Durgapur Steel Plant: British collaboration for establishment; others involved different international partners.</p> </div>

<div class="ai-exp-block"> <b>Explanation:</b> <p>The Green Revolution refers to a shift in agriculture through the widespread adoption of high-yielding varieties, chemical inputs, and improved irrigation. This New Agricultural Strategy took hold in the 1960s, marking the era when faster, increased food production became a central policy aim in many regions. The options point to the decade of adoption, and the correct choice is the Sixties. The other decades (Fifties, Seventies, Eighties) did not see the formal, large-scale adoption tied to the Green Revolution as described by the term “New Agricultural Strategy.”</p> </div> <div class="ai-did-block"> <b>? Did You Know?</b><br> <p>The term Green Revolution refers to the rapid adoption of high-yielding varieties, chemical fertilizers, and modern irrigation techniques that boosted crop yields.</p> </div> <div class="ai-remember-block"> <b>? Remember:</b> <p>Green Revolution adoption occurred in the 1960s.</p> </div>