General Knowledge - Geography and Astronomy

Acoustics is the branch of physics that studies the production, control, transmission, reception, and effects of sound. Botany studies plants, virology studies viruses, and zoology studies animals - none of these relate to sound.

Amartya Sen won the Nobel Prize in Economics in 1998 for his contributions to welfare economics. Manmohan Singh, though an eminent economist, has not won a Nobel Prize. Asif Ali Zardari and Michael Jackson have not won Nobel Prizes.

The inner (terrestrial) planets are Mercury, Venus, Earth, and Mars - the four closest to the Sun. Jupiter, Saturn, and Neptune are outer (gas/ice giant) planets much farther from the Sun.

Venus is called Earth's twin because of their similar size (Venus diameter is about 95% of Earth's) and similar mass. Both are terrestrial planets, though Venus has a toxic atmosphere and extreme temperatures.

The 13th President of India was Pranab Mukherjee (2012-2017). Giani Zail Singh was 7th, K.R. Venkataraman was 8th, and Pratibha Patil was 12th. Since none of these options match, 'None of these' is correct.

Earth is called the 'Blue Planet' because about 71% of its surface is covered by water, which appears blue from space. Mars is the red planet (iron oxide), none are commonly called yellow or green planets.

China has been the world's largest gold producer for many years, mining over 300 metric tons annually. India, Sri Lanka, and Pakistan are not major gold producers by comparison - India mostly imports gold.

The outer planets are Jupiter, Saturn, Uranus, and Neptune - the gas and ice giants beyond the asteroid belt. Earth and Mars are inner planets, and Mercury is the innermost planet.

CTBT stands for Comprehensive Test Ban Treaty, an international treaty to ban all nuclear explosions for both civilian and military purposes. It was adopted by the UN in 1996 but has not yet entered into force.

Neptune takes about 165 Earth years (approximately 60,190 Earth days) to complete one orbit around the Sun due to its vast distance - about 30 times farther from the Sun than Earth is.

China is the world's largest tin producer, accounting for roughly 35-40% of global production, primarily from Yunnan province. Malaysia used to be a major producer but China has dominated in recent decades.

Earth orbits the Sun in an anticlockwise direction when viewed from above the North Pole. This is the same direction as most planets in our solar system due to the conservation of angular momentum from the solar nebula.

The Bay of Bengal is the northeastern part of the Indian Ocean, bordered by India and Bangladesh. It is the largest bay in the world by area and forms a crucial maritime region for South Asian countries.

The Arabian Sea is the northwestern part of the Indian Ocean, located between India and the Arabian Peninsula. It has been an important trade route connecting the Middle East, South Asia, and East Africa for millennia.

The Java Sea is an extension of the Pacific Ocean, located between the Indonesian islands of Java to the south, Borneo to the north, and Sumatra to the west. It is a vital shipping lane connecting the Straits of Malacca to the Pacific Ocean.

The Sulu Sea is located in the southwestern Philippines and is part of the Pacific Ocean basin. It connects to the South China Sea and the Celebes Sea, making it an important maritime route in Southeast Asia.

Mars takes approximately 687 Earth days (about 1.88 Earth years) to complete one revolution around the Sun. This orbital period is longer than Earth's 365 days because Mars is farther from the Sun and has a larger orbit to traverse.

Jakarta is the capital and largest city of Indonesia, located on the northwest coast of the island of Java. It is the country's political and economic center, as well as the most populous urban area in Southeast Asia.

Y.S. Rajasekhara Reddy, popularly known as YSR, served as the Chief Minister of Andhra Pradesh from 2004 until his death in 2009. He was a prominent Indian National Congress leader known for his welfare schemes.

Sea of Japan is the marginal sea of the western Pacific Ocean. 

K-2, the second-highest mountain in the world at 8,611 meters, is also known as Godwin-Austen. It is located in the Karakoram range on the border between Pakistan and China. The name honors Henry Haversham Godwin-Austen, a British surveyor who explored the region.

Mahmud of Ghazni invaded India 17 times between 1000-1027 AD and famously destroyed the Somnath Temple in 1025 AD. He was a Turkish ruler who sought wealth from India's rich temples and established the Ghaznavid dynasty.

Venus is the hottest planet in our solar system with surface temperatures around 465°C due to its thick carbon dioxide atmosphere creating an extreme greenhouse effect. Although Mercury is closer to the Sun, it lacks a substantial atmosphere to trap heat.