General Science and Technology Quiz

John Logie Baird, a Scottish engineer, is credited with inventing the first working television system in the 1920s. He demonstrated the first working TV in 1926 and later developed color television. Faraday worked in electromagnetism, Edison in electric lighting and phonographs, and Marconi in wireless telegraphy.

Brijmohan Lal Munjal was the founder of the Hero Group, which established Hero Honda as a joint venture with Honda. Pawan Munjal is his son and the current chairman, but Brijmohan was the original founder.

The Soviet Union's Venera 3 spacecraft became the first spacecraft to crash-land on another planet when it impacted Venus on March 1, 1966. While it didn't survive the landing to transmit data, this mission marked humanity's first physical contact with another planet. Mars landings came later, with the Soviets' Mars 3 making the first soft landing in 1971.

Helium has the lowest boiling point of any element at approximately -268.93°C (or 4.22 K), just 4.2 degrees above absolute zero. This extremely low boiling point makes helium useful for cryogenic applications. Hydrogen, while also very low at -252.87°C, boils at a higher temperature than helium. Argon and Boron boil at much higher temperatures.

Maca root (Lepidium meyenii) is native to the Andes mountains of Peru, where it has been cultivated for over 2,000 years. This cruciferous vegetable grows at high altitudes (above 13,000 feet) in Peru's central region. While other Latin American countries have their own traditional herbal remedies, maca is specifically associated with Peruvian culture and agriculture.

Sweetlip Emperor, Bummalow, and Slippery Dick are all species of fish found in various marine environments. Slippery Dick is a type of wrasse found in the Atlantic, Sweetlip Emperor is a snapper from the Indo-Pacific, and Bummalow is a name used for certain fish species. These are not birds, lizards, or plants.

Dry ice is solid carbon dioxide (CO2). When it sublimates (turns directly from solid to gas), it becomes carbon dioxide gas. This is why dry ice 'disappears' without leaving a liquid residue. Carbon monoxide is a different, toxic gas.

Évariste Galois is credited with founding modern group theory in the early 19th century, making groundbreaking contributions to abstract algebra before his death at age 20. Archimedes focused on geometry and physics, Pascal on probability and fluid mechanics, and Descartes on analytic geometry and coordinate systems. Note the option has a minor spelling error but correctly identifies Galois.

DNA consists of four nucleotide bases represented by single letters: A (Adenine), T (Thymine), C (Cytosine), and G (Guanine). These four bases in various sequences encode all genetic information. The options with R and L are incorrect as they don't represent standard DNA nucleotides.

Aerobic respiration, including the Krebs cycle and electron transport chain, is completed in the mitochondrion, the powerhouse of the cell. The nucleus contains genetic material, the cytoplasm hosts glycolysis (the first stage of respiration), and the plasma membrane regulates transport. Note option D has a truncated word but the context remains clear.

Deuterium is a stable isotope of hydrogen with one proton and one neutron in its nucleus, unlike common hydrogen (protium) which has only a proton. It's also called 'heavy hydrogen' and is used in nuclear reactors and biochemical research. Carbon, nitrogen, and sulfur are completely different elements.

Approximately one-fifth (about 20%) of Earth's land surface is classified as desert, defined by very low precipitation (less than 250mm annually). This includes both hot deserts like the Sahara and cold deserts like Antarctica. One-quarter, one-third, or one-half would overestimate desert coverage.

Jupiter boasts Ganymede, the largest moon in our solar system at 5,268 km diameter, which is even larger than the planet Mercury. Neptune's largest moon Triton, Earth's Moon, and Mars' moons Phobos and Deimos are all significantly smaller.

An amalgam is, by definition, an alloy containing mercury combined with one or more other metals. Mercury is the essential component that distinguishes amalgams from other alloys. Nickel, iron, and zinc can be alloyed with mercury to form amalgams, but mercury must be present.

Alexander Graham Bell patented the first practical telephone in 1876, famously demonstrating it by saying 'Mr. Watson, come here, I want to see you.' The invention revolutionized long-distance communication by transmitting voice electronically.

Thomas Adams invented modern chewing gum in 1869 while experimenting with chicle, a natural rubber from the sapodilla tree. He originally intended to use it as a rubber substitute but found it made better chewing gum, founding the American Chicle Company.

Orville and Wilbur Wright invented, built, and flew the world's first successful airplane in 1903 at Kitty Hawk, North Carolina. Their three-axis control system made fixed-wing powered flight possible and remains the standard for aircraft today.

Rudolph Diesel invented the diesel engine in the 1890s, patenting it in 1892. The diesel engine works on compression ignition rather than spark ignition, making it more efficient for heavy-duty applications like trucks, ships, and industrial machinery.

Thomas Alva Edison invented the phonograph (1877), perfected the practical lightbulb (1879), and played a pivotal role in developing motion pictures. His inventions established the modern electric and entertainment industries, earning him over 1,000 patents.

Biotechnology uses living organisms, cells, and enzymes to produce useful products on an industrial scale. It includes making drugs, vaccines, hormones, and antibiotics through fermentation processes using microorganisms like bacteria and yeast.