General Awareness (Easy)

The human spinal column typically consists of 33 vertebrae in total, including the cervical, thoracic, lumbar, sacral, and coccygeal regions.

The liver is the largest internal organ and the largest gland in the human body, performing numerous essential metabolic functions.

Christopher Latham Sholes is credited with inventing the first commercially successful typewriter in 1868.

Elisha Otis invented the safety elevator (lift) in 1852, which prevented the car from falling if the hoisting rope broke.

Tungsten is used for light bulb filaments because it has an extremely high melting point, allowing it to glow without melting when heated by electricity.

Heinrich Hertz was the first person to demonstrate the existence of electromagnetic waves (radio waves) in a laboratory setting.

The dog was the first species to be domesticated by humans, likely from wolves, long before other livestock.

TIROS-1 (Television Infrared Observation Satellite) was the first weather satellite, launched in 1960. The option 'Tiras-I' appears to be a misspelling of TIROS-1. Bhaskara-I was Indian, Meteostat is European.

Willow wood is used for cricket bats because it is lightweight yet tough and resistant to splitting upon impact with a cricket ball.

Carbon dioxide is an acidic oxide because it reacts with water to form carbonic acid.

Wheat rust is a plant disease caused by fungi of the genus Puccinia.

Uranium-235 is the isotope primarily used in nuclear fission weapons because it is fissile.

Radioactive elements emit three main types of radiation: alpha particles, beta particles, and gamma rays.

German silver is an alloy consisting of copper, nickel, and zinc. Despite its name, it contains no silver.

The rusting of iron is a chemical process where iron reacts with oxygen in the presence of water to form iron oxide, which is an oxidation reaction.

Thiamine (vitamin B1) was the first B vitamin discovered and is often referred to simply as vitamin B in older contexts. Other options: riboflavin is B2, nicotinamide is a form of B3, and ascorbic acid is vitamin C.

Convex mirrors provide a wider field of view compared to plane or concave mirrors, allowing drivers to see more of the road behind them. They produce virtual, diminished, and erect images.

The Sea of Tranquility (Mare Tranquillitatis) is a large lunar mare on the Moon, famous as the landing site of the Apollo 11 mission.

The Coulomb is the SI unit of electric charge, representing the amount of charge transported by a constant current of one ampere in one second.

A standard galvanometer is designed to measure direct current (DC). Using alternating current (AC) would cause the needle to oscillate rapidly around zero due to the changing direction of current, resulting in no net deflection.

The word algebra comes from the Arabic word al-jabr, which appears in the title of a book by the mathematician Al-Khwarizmi.

Human somatic cells contain 46 chromosomes, which are organized into 23 pairs. Gametes (sperm and egg cells) contain 23 chromosomes.

The sky appears blue because of Rayleigh scattering, which is a form of light scattering where shorter wavelengths (blue) are scattered more strongly by atmospheric particles than longer wavelengths (red). While often categorized under scattering, it is frequently grouped with dispersion in general science contexts.