States of Matter

When atoms from two or more different elements chemically bond together, they form a compound. Compounds have properties different from the elements that make them up. A crystal is a structured arrangement of particles, not specifically different substances joining. Particles and liquid are general terms not specific to chemical combination.

The adult human body is approximately 60-70% water, with the exact percentage varying by body composition and gender. The brain and heart are about 73% water, while bones are about 31% water. The overall average for adults is commonly cited as 60-70%.

Water intoxication (hyponatremia) occurs when excessive water consumption dilutes sodium levels in the blood to dangerous levels. This can cause cells to swell, leading to potentially life-threatening complications including brain swelling. It's most common in endurance athletes and people participating in water drinking contests.

Standard vodka is 40% ABV (80 proof), which is the most common and widely-regarded strength for optimal flavor balance. The 42.8% and 42% options are unusual. Option B at 84.2% would be extremely high for vodka (well above standard rectified spirit). The 40% standard is used globally for premium vodka brands.

Water has polar molecules with partial positive and negative charges due to oxygen's electronegativity. This allows strong dipole-dipole interactions and hydrogen bonding, requiring more energy (higher temperature) to overcome. Methane is nonpolar with weaker intermolecular forces.

Liquid water does have hydrogen bonds, but they're dynamic and transient - constantly breaking and reforming as water molecules move. This allows fluidity (tumbling motion) while maintaining stronger intermolecular attraction than would exist without hydrogen bonding.

Iodine (as tincture of iodine or povidone-iodine) is a common antiseptic carried in first aid kits for disinfecting wounds and preventing infection. While alcohol can also be used as a disinfectant, iodine solutions are more stable and have longer-lasting antimicrobial properties, making them preferred for field use. NaCl (salt) is not a disinfectant, and benzene is a toxic carcinogen never used medically.

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.

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.