Skip to content Home Questions Play Progress Daily Challenge Questions › Chemistry Questions QUESTION Which listed greenhouse gas is most abundant in Earth’s atmosphere when atmospheric water vapour is included? Open question → QUESTION In NCERT’s account of Indian mineral and energy resources, which coal is described as the most popular in commercial use? Open question → QUESTION An isotope of which listed element is used as a gamma-ray source in cancer radiotherapy? Open question → QUESTION Which listed material is commonly rich in quartz, silicon dioxide? Open question → QUESTION Eugenol is a major component of the essential oil of which listed spice? Open question → QUESTION In standard high-temperature short-time pasteurisation of ordinary fluid milk, what minimum temperature is paired with a holding time of at least 15 seconds? Open question → QUESTION Which listed food antioxidant is also used as an antioxidant constituent in defoaming formulations for yeast processing? Open question → QUESTION Which sodium salt of glutamic acid is commonly added to Chinese food, canned vegetables, soups and processed meats to enhance the flavour? Open question → QUESTION Which listed compound is a naturally occurring yellow-orange pigment in turmeric? Open question → QUESTION Which of the following pairs correctly matches a food product with a common, toxic adulterant used to alter its appearance? Open question → QUESTION Which listed range is closest to the usual pH of fresh normal milk? Open question → QUESTION Which listed gas has been used improperly for artificial fruit ripening and is prohibited for that purpose by FSSAI? Open question → QUESTION Which listed gas is used with oxygen for inhalation sedation and analgesia in dentistry? Open question → QUESTION Match the chemical compounds in List I with their characteristic spice sources in List II. List I (Chemical compound) | List II (Spice) A.… Open question → QUESTION Which listed synthetic red azo dye has been reported as an unauthorised colour adulterant in hot paprika? Open question → QUESTION Which listed gas is associated with both coal mines and marsh gas? Open question → QUESTION Which of the following contains small droplets of liquid or particles of solid dispersed in a gas? Open question → QUESTION Compounds containing which listed element are responsible for the characteristic garlicky odour of garlic? Open question → QUESTION Which organic compound has a pleasant almond aroma that is commonly used to impart almond flavour to chocolate and baked goods? Open question → QUESTION Which listed sodium compound is used as an antimicrobial preservative against yeasts and moulds in some acidic fruit juices? Open question → QUESTION What is formed when Anhydrite (CaSO₄) undergoes hydration? Open question → QUESTION Which of the following metal salts is responsible for permanent hardness in water? Open question → QUESTION Which listed clay mineral can form during hydrolytic weathering of orthoclase feldspar? Open question → QUESTION Which odour is conventionally associated with many simple esters in introductory chemistry? Open question → Home Questions Play Progress 