States of Matter

Gasoline cannot freeze no matter how cold the temperature falls under normal conditions. This is because gasoline is a complex mixture of various hydrocarbons with different freezing points. While individual components might freeze at extremely low temperatures, the mixture as a whole doesn't have a single freezing point like water or other pure liquids.

This is a trivia question based on the common myth that alcohol causes scorpions to become aggressive and sting themselves. Small amounts of alcohol are believed to affect scorpions' nervous systems, causing erratic behavior. This falls under general trivia/interesting facts.

In the Bollywood film 3 Idiots, Farhanitrate and Prerajulization were made-up terms used by the character Chatur Ramalingam (Silencer) to mock his classmates. These nonsense words were meant to sound impressive but were actually meaningless. The joke highlights the absurdity of rote learning and pretentious academic language.

The brain is approximately 80% water. This high water content is necessary for proper brain function, as water is essential for neural transmission, maintaining cellular structure, and removing waste products from brain tissue.

Apples contain approximately 84-86% water by weight, making them a very hydrating fruit. This high water content is typical of most fresh fruits.

Dry ice is solid carbon dioxide (CO₂). When it sublimates (transitions directly from solid to gas without becoming liquid), it becomes carbon dioxide gas. The process releases CO₂ gas visible as fog when it contacts moist air. It doesn't become water (which would require H₂O), carbon monoxide (CO), or nitrous oxide (N₂O). This is a fundamental property of dry ice used for cooling and special effects.

The French word for "water" is "eau" (option A). Options B ("Froid") and C ("Chaud") mean cold and hot respectively - temperature descriptors, while D ("Livre") means book.

Aqua regia is a mixture of nitric acid and hydrochloric acid, typically in a 1:3 molar ratio. This combination can dissolve noble metals like gold and platinum, which neither acid can dissolve alone - the chlorides formed are soluble while the oxides are not.

While some bottled water has been found to contain contaminants, the specific claim that exactly one-third contains synthetic organic chemicals, bacteria, and arsenic together is not supported by research. Studies show varying contamination levels, but this precise statistic is exaggerated.

The refrigeration effect is the heat absorbed by the refrigerant as it evaporates at low pressure and temperature. This is the useful cooling produced by the system - the evaporator absorbs heat from the space being cooled.

Unit operations involve physical changes (like filtration, distillation, heat transfer) without chemical reactions. Unit processes involve chemical changes (like combustion, polymerization) where chemical composition changes. Option E correctly combines these definitions: unit operations are physical-only, unit processes are chemical-focused changes.

Water on the Moon exists primarily as thin films of water molecules trapped in lunar dust and minerals, not as liquid bodies like rivers or wells. This water was confirmed by missions like Chandrayaan-1 in 2009. Options A and C suggest flowing water bodies which don't exist on the Moon, while 'gel' is not how lunar water is found.

Sodium is an alkali metal that reacts violently with water, producing hydrogen gas and heat. The heat ignites the hydrogen, causing an explosion. This is a characteristic property of Group 1 metals.