Skip to content Home Questions Play Progress Daily Challenge Questions › Chemistry Questions QUESTION Which listed chemist developed chemical silvering of glass for mirrors in the nineteenth century? Open question → QUESTION Consider the following statements. 1. Henry Moseley established atomic number through cathode-ray experiments. 2. Moseley’s law helped establish the ordering of the periodic table… Open question → QUESTION Who proposed the 1811 molecular hypothesis that reconciled Dalton’s atomic account with Gay-Lussac’s results on gas-combining volumes? Open question → QUESTION Which among the following is used as the fining agent in wine? Open question → QUESTION Which listed reaction contributes to browning and flavour development when meat is roasted or seared? Open question → QUESTION Which listed acid is used in precious-metal refining and parting, including separating silver from gold? Open question → QUESTION Which listed mineral is not a conventional toothpaste ingredient because it is a lead-sulphide ore? Open question → QUESTION In NCERT’s introductory example of flame-resistant coatings on firefighters’ uniforms, which plastic is named? Open question → QUESTION Which listed category is outside the purpose of microbial disinfection of drinking water, rather than being a target for microbial destruction or inactivation? Open question → QUESTION Which listed hazards may occur with concentrated acidic drain cleaners containing sulphuric or hydrochloric acid? Open question → QUESTION Which of the following is NOT a chemical coagulant used in water treatment? Open question → QUESTION In the conventional charge-neutralising coagulation stage before flocculation in water treatment, the species added to destabilise negatively charged particles are typically ______. Open question → QUESTION Urea, a commonly used nitrogen-based fertilizer, is prepared by the reaction between ammonia and ____. Open question → QUESTION Why is water fluoridation, which is the controlled adjustment of fluoride to public water supply, done? Open question → QUESTION Compounds containing which listed non-metallic element in petroleum can contribute to corrosion in engines and refinery equipment? Open question → QUESTION Which aspartic-acid-containing dipeptide-derived sweetener is approximately 2000 times sweeter than sucrose? Open question → QUESTION Saw dust is used to adulterate: Open question → QUESTION Which listed compound is used as a fumigant pesticide for stored cereals? Open question → QUESTION Which listed bath salt is the hydrated magnesium sulphate compound containing magnesium, sulphur and oxygen? Open question → QUESTION Titanium dioxide, which is used as a white pigment in products such as toothpaste, is derived from which mineral? Open question → QUESTION Which listed synthetic food colour is designated E104 and is used in specified foods and beverages where permitted? Open question → QUESTION Which inorganic compound is used to manufacture soap, rayon, paper, explosives, dyes, and petroleum products? Open question → QUESTION Consider the following statements about red-cabbage anthocyanin pigments. 1. They are pigments found in red cabbage. 2. They turn pink in alkaline substances and… Open question → QUESTION Which listed sodium compound is used as a fixer in conventional silver-halide photography? Open question → Home Questions Play Progress 