Physical & Regional Geography

The border between Canada and the United States is the longest international border in the world, stretching approximately 8,891 kilometers (5,525 miles), including the border shared with Alaska. It is a peaceful boundary and includes both land and water segments. Chile and Argentina: * Length: Approx. 5,308 kilometres * This is the third-longest international border in the world and the longest in South America. * It follows the Andes mountain range for most of its length, with several high-altitude border crossings. China and India: * Length: Approx. 3,488 kilometers
* It is highly disputed in areas such as Aksai Chin and Arunachal Pradesh, leading to occasional tensions between the two nations. Kazakhstan and Russian Federation: * Length: Approx. 7,644 kilometers * This is the second-longest international border in the world. * It is largely flat, passing through vast steppes, and is a vital region for trade and natural resources between the two countries.

* Statement 1: Correct. The Red Sea is located in a desert region with very high temperatures and low humidity. This leads to very little rainfall or any form of precipitation. * Statement 2: Correct. Due to its location, no major rivers are flowing into the Red Sea. The water in the Red Sea comes primarily from the inflow of saltier water from the Gulf of Aden through the Bab el-Mandeb Strait. Hence, both statements (1 and 2) are correct.

Statement 1 is correct: In a seismograph, P waves are recorded earlier than S waves. This is true because P waves, also known as Primary waves, are the first to be recorded by a seismograph during an earthquake. They are faster and hence, reach the recording instrument before the S waves. Statement 2 is correct: P waves are longitudinal or compressional waves, which means the particles in these waves vibrate in the same direction as the wave propagation. On the other hand, S waves, or Secondary waves, are transverse waves, where the particle motion is perpendicular to the direction of wave propagation.
Therefore, both statements are correct.

* Ilmenite (FeTiO3) and Rutile (TiO2) are both minerals that contain high concentrations of titanium.  * Titanium is a strong and lightweight metal known for its excellent corrosion resistance and high strength-to-weight ratio. It is widely used in various industries, including aerospace, automotive, medical, and construction.  * In India, certain coastal tracts are known for their significant ilmenite and rutile deposits. Hence these minerals are also called beach sand minerals. These minerals are commonly found in beach sand deposits and are extracted through beach sand mining operations. The extracted ilmenite and rutile are processed to obtain titanium dioxide (TiO2), which is then further refined to produce metallic titanium.  * Beach sand is rich in seven heavy minerals—ilmenite, leucoxene, rutile, zircon, sillimanite, garnet and monazite.

* Cobalt has emerged as a vital ingredient for the shift to a lower-carbon energy system, but reserves of the metal are concentrated heavily in just a single country. * The Democratic Republic of Congo (DRC) is home to half of the world's known resources and currently accounts for around 70% of global production.  * The metals used in electronic goods, particularly the rechargeable batteries used in electric vehicles and other forms of energy storage means interest in it is growing as the electrification of the global energy system continues to gather pace. * Cobalt is used in batteries, superalloys, catalysts, magnets, and pigments for various industries like electronics, aviation, and manufacturing. * Democratic Republic of Congo (I), Indonesia (II), Russia (III), Australia (IV), and Madagascar (V) are the top 5 Cobalt-producing countries in the world. * Small deposits of Cobalt are known to exist in Odisha & Jharkhand in India. * Cobalt has also been classified as a critical mineral by the Government of India.

Statement-I is incorrect: The temperature contrast between land and ocean is actually greater in winter, not in summer. In winter, land loses heat quickly and becomes much colder, while the ocean retains heat and stays relatively warm → large contrast.
In summer, both land and ocean warm up, but the difference is less pronounced compared to winter → smaller contrast. Statement-II is correct: Water has a higher specific heat capacity than land. It heats up and cools down more slowly, which explains why oceans have a moderating influence on temperature.

* Statement I is incorrect: The soil in tropical rainforests is not rich in nutrients. The heavy rainfall in these regions washes away the nutrients from the soil, preventing them from accumulating. * Statement II is correct: In tropical rainforests, high temperature and humidity help dead plants and animals decompose quickly. The warmth and moisture create the perfect conditions for bacteria and fungi, which are tiny organisms that break down dead material. These decomposers work faster in such an environment, turning dead matter into nutrients that go back into the soil to support new plant growth. Therefore, Statement-I is incorrect but Statement-II is correct.

Statement 1 is incorrect: The East-West Corridor is a part of the National Highways Development Project (NHDP) in India, which aims to connect Silchar in Assam to Porbandar in Gujarat. It does not connect Dibrugarh in Assam and Surat in Gujarat. Statement 2 is incorrect:  The Trilateral Highway is a connectivity project that aims to connect Moreh in Manipur, India, with Mae Sot in Thailand via Myanmar. It is an important infrastructure project to enhance trade, connectivity, and people-to-people ties among the three countries. Statement 3 is incorrect:  The Bangladesh-China-India-Myanmar Economic Corridor (BCIM) is a proposed economic corridor that aims to connect Kunming in China with Kolkata in India, passing through Myanmar and Bangladesh. Varanasi in Uttar Pradesh is not directly connected to this corridor. Thus, none of the statements are correct

* Option 1 is incorrect:  Jackfruit, (Artocarpus heterophyllus) is a tropical evergreen tree (family Moraceae) native to tropical Asia and widely grown throughout the wetland tropics for its large fruits and durable wood. The greenish unripe fruit is cooked as a vegetable, and the brown ripened fruit is eaten fresh for the sweetly acidic but insipid pulp surrounding the seeds.  * Option 2 and 3 are correct:  The Moist deciduous forests are more pronounced in the regions which record rainfall between 100-200 cm. These forests are found in the northeastern states along the foothills of Himalayas, eastern slopes of the Western Ghats and Odisha. Teak, sal, shisham, hurra, mahua, amla, semul, kusum, and sandalwood etc. are the main species of these forests.

* While it is true that the equator receives more direct sunlight compared to the poles, the actual difference in insolation is not as large as ten times. The difference in insolation between the equator and poles is primarily due to the curvature of the Earth and the tilt of its axis, resulting in varying angles at which sunlight reaches different latitudes. * Insolation includes various wavelengths, such as visible light, ultraviolet rays, and infrared rays, but infrared rays do not constitute two-thirds of it. * Water vapour is a greenhouse gas that absorbs infrared radiation emitted by the Earth's surface. This absorption contributes to the greenhouse effect and helps regulate the Earth's temperature. Hence, this is the correct statement. * Infrared waves are not part of the visible spectrum; they have longer wavelengths than visible light.