Chemistry questions This is a list of recently added questions about chemistry. Play chemistry quiz and see all the questions. Which of the following chlorine oxoacids is the strongest?HClO4. With the same central atom, acid strength increases as the number of oxygens attached to it increases, so perchloric acid (HClO4) is the strongest.Created by: Ninjaihard 50% HClOHClO72HClO2HClO236HClO3HClO359HClO4HClO4169acids riddles » What will happen if you mix glycerol with potassium permanganate?The flame will appear. Potassium permanganate is typically included in survival kits: as a fire starter (mixed with antifreeze from a car radiator or glycerol), water sterilizer, and for creating distress signals on snow.Created by: Ninjaivery hard 38% nothingnothing70it will emit a very strong odorit will emit a very strong odor119the flame will appearthe flame will appear297potassium permanganate will change its colourpotassium permanganate will change its colour292 What is the bond angle in a water molecule?Around 105°. The water molecule maintains a bent shape (at around 104.5 degrees) because of two considerations. First, the tetrahedral arrangment around the oxygen; and second, the presence of lone pair electrons on the oxygen.Created by: Ninjaihard 50% around 90°around 90°612around 65°around 65°649around 105°around 105°1798around 180°around 180°484water riddles » The dynamite patented by Alfred Nobel consisted of...Nitroglycerin and diatomaceous earth . Alfred Nobel found that when nitroglycerin was incorporated in an absorbent inert substance like diatomaceous earth it became safer and more convenient to handle, and this mixture he patented in 1867 as "dynamite".Created by: Ninjaihard 47% TNT and ligniteTNT and lignite1636gunpowder and plastic massgunpowder and plastic mass1125nitroglycerin and diatomaceous earth nitroglycerin and diatomaceous earth 4154nitroglycerin and ammonium nitratenitroglycerin and ammonium nitrate1771technology riddles » What was the first chemical element to be artificially produced?Technetium. Many of technetium's properties were predicted by Dmitri Mendeleev, who left a gap in his periodic table before the element was discovered. It was finally discovered by Emilio Segrè and Carlo Perrier in 1937 and named after the Greek word τεχνητός, meaning "artificial", since it was the first element to be artificially produced.Created by: Ninjaihard 40% promethiumpromethium16actiniumactinium25technetiumtechnetium46plutoniumplutonium28elements riddles » What effect does the botulinum toxin have on the neuromuscular junction?It prevents the release of the acetylcholine . Botulinum toxin is a neurotoxic protein that prevents the release of the neurotransmitter acetylcholine from axon endings at the neuromuscular junction and thus causes flaccid paralysis. Although it is the most acutely lethal toxin known, it is used commercially in medicine, cosmetics and research. Created by: Ninjaivery hard 27% it escalates the release of the acetylcholine it escalates the release of the acetylcholine 187It prevents the release of the acetylcholine It prevents the release of the acetylcholine 444it blocks the postsynaptic receptorsit blocks the postsynaptic receptors786it escalates the function of the acetylcholinesteraseit escalates the function of the acetylcholinesterase190science riddles » Which of the following is not a water soluble vitamin?K. Vitamins are classified as either fat soluble (vitamins A, D, E and K) or water soluble (vitamins B and C). Created by: Ninjaihard 55% B2B2411KK2414HH695B12B12861vitamins riddles » What chemical element gives the blood of a lobster and octopus a bluish tint?Copper. Lobsters,octopus, snails, spiders and other creepy-crawlies have blood that uses copper for oxygen transport. This is called Hemocyanin. Oxygenation causes a color change between the colorless Cu deoxygenated form and the blue Cu oxygenated form. Vertebrates like humans , have iron based blood.Created by: Tschukavery hard 22% CobaltCobalt68ManganeseManganese29CopperCopper32molybdenummolybdenum11blood riddles » Who Discovered Magnetic Field? Hans Christian Oersted. Danish physicist and chemist Hans Christian Oersted (1777-1851) discovers in 1820 that electric current affects a compass needle and create magnetic fields. He was the first scientist to find the connection between electricity and magnetism. He is remembered today for Oersted's Law. Created by: Tschukavery hard 35% André-Marie Ampère André-Marie Ampère 45Alessandro VoltaAlessandro Volta58Hans Christian OerstedHans Christian Oersted116Michael Faraday Michael Faraday 111Denmark riddles » What is "Aqua regiaor" ?A mixture of two acids. Aqua regiaor ("king's water") is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange fuming liquid, so named by alchemists because it can dissolve the noble metals gold and platinum, though not all metals. Created by: Marcelhard 45% a mixture of two acidsa mixture of two acids904water with the addition of a small amount of goldwater with the addition of a small amount of gold381the mythic substance that the alchemists wantedthe mythic substance that the alchemists wanted267hydrated gold oxidehydrated gold oxide425legends riddles » Play chemistry quiz and see all the questions.