Tag: science & technology

Carbonic acid (H2CO3) is formed when carbon dioxide dissolves in water, creating the characteristic fizz or bubbles in soft drinks. Ascorbic acid is Vitamin C sometimes added as a preservative. Citric acid adds tart flavor. Phosphoric acid is used in colas for tartness but doesn't produce the fizz itself.

Sodium hydroxide (NaOH), also known as lye or caustic soda, is a key ingredient in traditional soap-making through saponification - reacting with fats/oils to produce soap. Potassium hydroxide is used for liquid soaps. Sodium chloride is table salt. Calcium carbonate is not involved in soap production.

Thimerosal (spelled thimerosol in the question) is an organomercury compound containing approximately 49% mercury by weight. It was widely used as a preservative in vaccines and other medical products. Iron, cadmium, and silver are not components of thimerosal.

Ajay Bhatt is the co-inventor of USB (Universal Serial Bus) along with his team at Intel. He appeared in Intel's 'Sponsors of Tomorrow' campaign highlighting his contributions to computing technology. The other options (Ajay Chawla, Ajoy Mukherjee, Ajay Devgan - the actor) are not the correct USB co-inventor.

BHA (butylated hydroxyanisole) and BHT (butylated hydroxytoluene) are antioxidants specifically added to fats and oils in foods to prevent oxidation. Oxidation causes fats to become rancid, developing off-flavors and odors. These compounds work by interrupting the free-radical chain reactions that cause lipid breakdown. They do not affect sugars, colors, or artificial sweeteners.

Fructose is a natural sugar found in fruits, honey, and some vegetables. It is not chemically synthesized like artificial sweeteners. Acesulfame potassium, aspartame, and sucralose are all artificial sweeteners created through chemical synthesis to provide sweetness without calories. The question asks which one is NOT artificial, making fructose the correct choice.

Red ants inject formic acid (methanoic acid, HCOOH) when they sting, causing the characteristic burning sensation. Formic acid is named after the Latin word for ant, 'formica.' Ascorbic acid is vitamin C, glutamic acid is an amino acid involved in umami taste, and hydrochloric acid is found in gastric juice.

McCaslin was the code name for Intel's Ultra Mobile Platform 2007, designed for ultra-mobile PCs and mobile internet devices. It was part of Intel's strategy for low-power, portable computing platforms before the Atom brand was fully established. The other options refer to other Intel projects or tools but are incorrect.

Silicon dioxide (SiO2) is the fundamental compound used as the base material for manufacturing all integrated circuits (ICs). It serves as an excellent insulator and is the primary material in semiconductor wafers.

The modern decimal system with place value and zero was indeed developed by ancient Indian mathematicians. While the Indus Valley Civilization had advanced mathematics, the fully developed decimal system emerged during the classical period of Indian mathematics.